IPS 2025
Conference Management System
Main Site
Submission Guide
Register
Login
User List | Statistics
Abstract List | Statistics
Poster List
Paper List
Reviewer List
Presentation Video
Online Q&A Forum
Ifory System
:: Abstract List ::

Page 6 (data 151 to 180 of 294) | Displayed ini 30 data/page
<< PREV 1 2 3 4 5 6 7 8 9 10 NEXT >>

151 Material Physics ABS-310

Synthesis and Characterization of Materials as Superhydrophobic Protectors Based on TEOS as a Replacement for Silica
Irpansyah Siregar, Jon Affi, Gunawarman, Yuli Yetri, Hariyati Lubis,Tengku Machdalie Sofie

1Postgraduate Program Mechanical Engineering, Department of Mechanical Engineering, Universitas Andalas, Limau Manis, 25166, Padang, West Sumatera, Indonesia
2Faculty of Engineering, Department of Mechanical Engineering, Universitas Andalas, Limau Manis, 25166, Padang, West Sumatera, Indonesia
3Department of Mechanical Engineering, Politeknik Negeri Padang, Limau Manis, 25166, Padang, West Sumatera, Indonesia
4Department of Civil Engineering, Universitas Amir Hamzah, Pancing Pasar V Barat, Medan 20371, Indonesia
5Department of Electrical, Universitas Amir Hamzah, Pancing Pasar V Barat, Medan 20371, Indonesia


Abstract

In the research, the superhydrophobic protects based on TEOS as a replacement for silica are done with using the coprecipitation method. The characterized use Scanning Electron Microscope (SEM-EDS) and X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD). The SiO2 diffraction peak was found at an angle of 2&#952- = 31.680, according to the XRD characterization. The building block of silica is the primary structural unit SiO44-, which is made up of one Si4+ atom surrounded by four oxygen atoms that are joined ionically and covalently to form tetrahedral bonds. The element Si was discovered to be present based on XRF analysis. The morphology results, which display uniform shapes, are the result of the sample^s even grinding process. Based on XRF testing, it was found that the element Si was present. obtained from TEOS as a substitute for Silica.

Keywords: Synthesis, TEOS, Superhydrophobic, Silica, Characterization

Share Link | Plain Format | Corresponding Author (Jon Affi)


152 Material Physics ABS-55

Analisis Celah Energi pada Film Tipis Ba0,375Sr0,625TiO3 di atas Substrat Kaca Indium Tin Oxide (ITO) dan Substrat Si (100) Tipe P
Muhammad Izatul Al Fajar (1*), Novia Fransiska Simbolon (1), Dea Widiawati (1), Renny Apriani Dwika Saputri (1), Habibah Assa^addah (1), dan Irzaman (1)

(1) Department Fisika, FMIPA, IPB University, Bogor, Indonesia, 16680

*E-mail: m_izatul[at]apps.ipb.ac.id


Abstract

Film tipis Ba0,375Sr0,625TiO3 berhasil difabrikasi pada substrat kaca Indium Tin Oxide (ITO) menggunakan metode Chemical Solution Deposition (CSD) dengan larutan prekursor berkonsentrasi 0,5 M. Proses pelapisan dilakukan melalui teknik spin coating pada kecepatan 3000 rpm, diikuti dengan proses annealing pada suhu 550 C dengan laju pemanasan 100 C per jam selama 16 jam, kemudian didinginkan secara bertahap hingga suhu kamar. Substrat kaca ITO yang digunakan memiliki ketebalan 1,1 mm dan resistivitas sekitar 20 ohm per kuadrat, sedangkan substrat silikon tipe P memiliki resistivitas sekitar 10 ohm per kuadrat. Sifat optik film tipis dikarakterisasi menggunakan spektrofotometer UV-Vis pada rentang panjang gelombang 230 hingga 850 nm. Hasil pengukuran menunjukkan nilai celah pita energi sebesar 1,57 eV pada substrat ITO dan 2,51 eV pada substrat silikon tipe P. Analisis celah pita dari film tipis Ba0,375Sr0,625TiO3 pada kedua jenis substrat ini penting dilakukan karena material tersebut berpotensi sebagai kandidat utama untuk aplikasi sensor tekanan di masa mendatang.

Keywords: Analisis energi gap- Film tipis- Ba0,375Sr0,625TiO3- Substrat ITO- Substrat Si (100)

Share Link | Plain Format | Corresponding Author (Muhammad Izatul Al Fajar)


153 Material Physics ABS-311

Preparation and Characterization of Chitosan from Shrimp Shells
Hariyati Lubis, Timbangen Sembiring, Susilawati, Perdinan Sinuhaji, Erna Frida, Syahrul Humaidi, Tengku Machdhalie Sofie, Irpansyah Siregar

Post Graduate Program Physics, Faculty of Mathematics and Natural Science, Universitas Sumatera Utara, Jl. Bioteknologi I Kampus USU, Medan, 20155, Indonesia
Department of Electrical Engineering, Faculty of Engineering, Universitas Amir Hamzah, Pancing Pasar V Barat, Medan 20371, Indonesia
Department of Mechanical Engineering, Faculty of Engineering, Universitas Amir Hamzah, Pancing Pasar V Barat, Medan 20371, Indonesia


Abstract

Shrimp is one of Indonesias leading export commodities, contributing significantly to the nation^s foreign exchange earnings. However, shrimp shell waste is an issue that needs to be addressed. Chitin and chitosan are multifunctional and versatile industrial materials. The chitin content in shrimp shell waste is approximately 20 percent-50 percent of its dry weight. Isolation of chitin compounds is carried out through a deproteinization reaction using 1&#8239-M NaOH solution with a ratio of 15:1 (v/w), stirred with a magnetic stirrer for 1 hour at 200&#8239-rpm. The demineralization reaction uses 1.5&#8239-M HCl solution, stirred for 1 hour at 200&#8239-rpm, and then dried in an oven for 6 hours at a temperature of 70C. The depigmentation reaction uses NaOCl solution with a ratio of 10:1 (v/w) in an extractor for 1 hour at 70&#8239-C. The deacetylation reaction to convert chitin into chitosan is carried out using 50 percent NaOH solution with a ratio of 10:1 (v/w) and oven-dried at 80C for 6 hours. XRD results show that chitosan derived from shrimp shells has a value of 19.54 theta. This is in accordance with the XRD test of Mercks chitosan factory which is 19.49 theta. Testing using SEM-EDX obtained a homogeneous morphology and a Si value of 0.4 percent. FTIR testing showed 2069.71 NH, N-H.The analysis of XRD results using XRD, SEM-EDS, FTIR show that chitosan has been successfully synthesized in this study.

Keywords: Preparation, Shrimp Shells, Chitosan, Characterization

Share Link | Plain Format | Corresponding Author (Timbangen Sembiring)


154 Material Physics ABS-56

Analisis Celah Energi Lapisan Tipis Ba0,75Sr0,25TiO3 pada Substrat Kaca Indium Tin Oxide (ITO) dan Substrat Si (100) Tipe-P
Kinanthi Freda Bhanuwati (1*), Ajat Sudrajat (1), Novia Fransiska Simbolon (1), Dea Widiawati (1), Renny Apriani Dwika Saputri (1), Habibah Assa^addah (1), dan Irzaman (1)

1) Departmen Fisika, FMIPA, IPB University, Bogor, Indonesia, 16680
*E-mail: kinanthifredabhanuwati[at]apps.ipb.ac.id


Abstract

Lapisan tipis Ba0,75Sr0,25TiO3 pada substrat kaca Indium Tin Oxide (ITO) dan Substrat Si (100) Tipe-P telah berhasil dibuat dengan metode Chemical Solution Deposition (CSD) dengan kelarutan 0,5 M yang dibantu dengan spin coating 3000 rpm, dan annealing pada suhu 550&#8451- dengan kelajuan suhu 100 &#8451-/jam yang ditahan selama 16 jam dan suhu pendinginan hingga suhu kamar. Substrat kaca Indium Tin Oxide (ITO) dengan ketebalan kaca 1,1 mm dan resistivitas ~20 ohm/sq serta resistivitas Si tipe-P ~10 ohm/sq. Lapisan tipis ini diuji sifat optiknya menggunakan Spektrofotometer UV-Vis dengan rentang 230 - 850 nm menghasilkan celah energi sebesar 2,84 eV di atas substrat Indium Tin Oxide (ITO) dan menghasilkan celah energi sebesar 2,24 eV di atas substrat Si (100) Tipe-P. Analisis celah energi pada lapisan tipis Ba0,75Sr0,25TiO3 pada substrat kaca Indium Tin Oxide (ITO) dan di atas substrat Si (100) Tipe-P sangat penting karena lapisan ini merupakan cikal bakal sensor tekanan.

Keywords: Analisis Energy Gap- Film Tipis- Ba0,75Sr0,25TiO3- Substrat ITO- Substrat Si (100) Tipe-P

Share Link | Plain Format | Corresponding Author (Kinanthi Freda Bhanuwati)


155 Material Physics ABS-57

Analisis Energi Gap Film Tipis Ba0,625Sr0,375TiO3 di atas Substrat Kaca Indium Tin Oxide (ITO) dan Substrat Si (100) Tipe P
Ayu Bonita Pertiwi Harianja (1)*, Ira Saira (1), Novia Fransiska Simbolon (1), Dea Widiawati(1), Renny Apriani Dwika Saputri (1), Habibah Assa^addah (1), dan Irzaman (1)

1) Departemen Fisika, FMIPA, IPB University, Bogor, Indonesia, 16680
* ayubonitapertiwi[at]apps.ipb.ac.id


Abstract

Abstrak. Lapisan tipis Ba0,625Sr0,375TiO3 di atas substrat kaca Indium Tin Oxide (ITO) dan Substrat Si (100) Tipe P telah berhasil dibuat dengan metode Chemical Solution Deposition (CSD) dengan kelarutan 0,5 M yang dibantu dengan spin coating 3000 rpm, dan annealing pada temperatur 550&#8451- dengan kelajuan suhu 100 &#8451-/jam yang ditahan selama 16 jam dan suhu pendinginan hingga suhu kamar. Substrat kaca Indium Tin Oxide (ITO) dengan ketebalan kaca 1,1 mm dan resistivitas ~20 ohm/sq dan resistivitas Si tipe P ~10 ohm/sq. Lapisan tipis ini diuji sifat optiknya menggunakan Spektrofotometer UV-Vis dengan rentang 230-850 nm dan menghasilkan celah energi sebesar 2,89 eV di atas substrat ITO dan celah energi sebesar 2,42 eV di atas substrat Si (100) tipe P. Analisis celah energi film tipis Ba0,625Sr0,375TiO3 di atas substrat kaca Indium Tin Oxide (ITO) dan di atas substrat Si (100) tipe P sangat penting dilakukan karena film ini merupakan cikal bakal sensor suhu.

Keywords:

Share Link | Plain Format | Corresponding Author (Ayu Bonita Pertiwi Harianja)


156 Material Physics ABS-63

Characteristics of Briquettes Made from Nipah Palm Fronds (Nypa fruticans) and Galam Bark (Melaleuca leucadendron)
Ninis Hadi Haryanti*, Suryajaya, Tetti Novalina Manik, Awal Ginanjar

Universitas Lambung Mangkuat (ULM)


Abstract

The utilization of nipah frond waste (Nypa fruticans) and galam bark (Melaleuca leucadendron) as materials for making briquettes has been carried out. Nipah fronds and galam bark were obtained from Bunipah Village, Banjar Regency, South Kalimantan. This study used an experimental method with a percentage variation of nipah frond and galam bark composition of 100:0, 75:25, 50:50, 25:75 and 0:100. The adhesive used was 20% resin, with a pressure of 200 kg/cm2 and was dipped in used cooking oil for 30 seconds. This study aims to determine the characteristics and quality of briquette combustion. The results showed that the characteristics of briquettes produced water content of 4.31-8.03%- ash content of 3.69-10.00%- bound carbon of 39.55-42.29%- calorific value of 6,854.71-7,689.51 cal/g, density of 0.78-0.83 g/cm3. While the quality of briquette combustion produced initial ignition time of 2.19-2.56 minutes- combustion duration of 91.47-129.24 minutes and combustion speed of 0.19-0.15 g/minute. Based on the test results, briquettes with a composition of 75:25 (75% galam bark: 25% nipah fronds) have the best characteristics and combustion quality compared to briquettes with other compositions.

Keywords: Briquettes, Nipah Palm Stems, Galam Bark, Resin, Waste Cooking Oil

Share Link | Plain Format | Corresponding Author (Ninis Hadi Haryanti)


157 Material Physics ABS-64

Effect of Calcination Temperature and Holding Time on Crystal Structure and Size of Tetragonal ZrO2
Anugrah Rezki Akhmad, Adam Aswin Usman, Misdayanti,Linda Silvia,Suminar Pratapa, Fahmi Astuti

Departement of Physics, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Surabaya, 60119, Indonesia


Abstract

This study investigates the synthesis of tetragonal zirconia (t-ZrO2) from natural zircon sand via alkali fusion, focusing on the effects of calcination temperature (800 C, 900 C, and 1000 C) and holding time (3, 5, 7, and 12 hours) on crystal structure and crystallite size. X-ray diffraction (XRD) analysis reveals that at 800 C, the lattice parameter a and unit cell volume initially decrease with increasing holding time, then increase, indicating a shift from stress relaxation and defect elimination to crystal growth and phase stabilization. In contrast, at 1000 C, both lattice parameter a and unit cell volume consistently decrease with longer holding times, reflecting enhanced atomic diffusion, reduction of oxygen vacancies, and stabilization of the tetragonal phase. Menawhile, crystallite size steadily increases with temperature and holding time, ranging from approximately 7 to 17 nm. These results indicate that holding time and temperature play crucial roles in the formation of t-ZrO2. Moreover, the crystallite size of t-ZrO2 increases nearly fourfold when the holding time is extended from 3 to 12 hours at 1000 C. The observed trends reflect the complex interaction between kinetic effects and thermodynamic stability in shaping the crystal structure and size evolution during alkali fusion synthesis.

Keywords: tetragonal zirconia,calcination temperature, holding time, phase transformation, crystal structure, crystallite size.

Share Link | Plain Format | Corresponding Author (Anugrah Rezki Akhmad)


158 Material Physics ABS-69

Structural Characterization of Tetragonal ZrO2 Derived from Zircon Sand: Crystal and Local Atomic Insights
Budi Hariyanto1,2, Chatree Saiyasombat3, Retno Asih1, Suminar Pratapa1*

1Department of Physics, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember (ITS), Surabaya 60111, Indonesia
2Department of Physics, Faculty of Mathematics and Natural Science, Universitas Palangka Raya, Palangka Raya 73111, Indonesia
3Synchrotron Light Research Institute (Public Organization), 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand


Abstract

Crystallographic analysis of ZrO2 powder derived from zircon sand was performed using ex-situ conventional X-ray powder diffraction (XRD) and synchrotron extended X-ray absorption fine structure (EXAFS) techniques. The ZrO2 powder was purified through alkali fusion and co-precipitation methods, utilizing zircon sand as the primary raw material. Phase analysis of the XRD data demonstrated that the as-synthesized powder, after calcination at 1000 C for 3 hours, yielded a pure tetragonal ZrO2 (t-ZrO2). Further structural analysis was conducted using the Rietveld refinement method, which provided the following lattice parameters: a = b = 3.5962(1) A, c = 5.1953(3) A, and unit cell volume V = 67.186(6) A3. The Zr-O shell in tetragonal ZrO2 was observed to consist of two distinct tetrahedra, designated as Zr-OI and Zr-OII. The EXAFS analysis of the local atomic structure around the Zr atoms revealed that the bond lengths for Zr-OI and Zr-OII were 2.112(7) A and 2.377(4) A, respectively. These findings provide valuable insight into the atomic-level structure of tetragonal ZrO2 derived from zircon sand.

Keywords: t-ZrO2, zircon sand, crystal structure, local structure

Share Link | Plain Format | Corresponding Author (Budi Hariyanto)


159 Material Physics ABS-100

THE EFFECT OF PURIFICATION PROCESS ON COLOIDAL GOLD AND SILVER CAPPED BY ORGANIC MATERIALS AND ITS APPLICATION AS PLASMONIC BIOSENSOR
Azza Azahra Ronald(a), Dinta(a), Setiya Rahayu(a), Herman (a), and Priastuti Wulandari(a*)

a) Physics of Magnetism and Photonics Research Division, Bandung Institute of Technology, Bandung, Indonesia
*pwulandari[at]itb.ac.id


Abstract

Nanotechnology is rapidly advancing, particularly in the use of gold (AuNPs) and silver nanoparticles (AgNPs) for biosensor applications. These metal nanoparticles exhibit localized surface plasmon resonance (LSPR), enabling strong light absorption and scattering at specific wavelengths based on size, shape, and environment, making them highly sensitive probes for biosensing applications. Capping agents such as citrate are commonly used to prevent nanoparticle aggregation and to facilitate further functionalization. In our study, we attempt to develop stable colorimetric biosensor probes based on AuNPs and AgNPs capped by citrate. Nanoparticles were synthesized via a chemical reduction method and purified through high-speed centrifugation to remove excess ions and unreacted substances. Characterization was conducted by used of Ultraviolet-Visible (UV-Vis) spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, and Transmission Electron Microscopy (TEM). The results show the appearance of plasmonic peaks at 522 nm for citrate capped Au (AuCA) with a red-wine color, while citrate capped Ag (AgCA) exhibits peak at 426 nm with a brownish-yellow color. FTIR analysis reveals distinct chemical interactions between capping agent and metal surfaces. In our experiment, the optimum speed and time of centrifugation process for purification of our synthesized nanoparticles are 8000 rpm and 20 min of time duration for AuCA, while 8000 rpm and 10 min of time duration for AgCA. TEM images confirm homogeneous and stable distribution of both nanoparticles after purification with average nanoparticle diameters are 15.1 nm for AuCA and 38.4 for AgCA. Colorimetric assays indicate aggregation through spectral shifts of plasmonic peaks in both AuCA and AgCA upon avidin-biotin interaction. However, in our experiment the visual detection of color changes in the colloidal solutions are not clearly visible.

Keywords: Gold Nanoparticle, Silver Nanoparticle, Citrate, Localized Surface Plasmon Resonance, Purification.

Share Link | Plain Format | Corresponding Author (Azza Azahra Ronald)


160 Material Physics ABS-111

Synthesis Strategy of Cs2SnI6 Perovskite by Modified Hot Injection Method and Its Potential Application for Optoelectronic Device
Hilarius Donatus Hun, Difa Ayatullah Muthmainnah, Hawinda Restu Putri, Setiya Rahayu, and Priastuti Wulandari*

Physics of Magnetism and Photonic Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, West Java, Indonesia
*pwulandari[at]itb.ac.id


Abstract

In recent years, the easy and environmentally friendly synthesis of lead-free perovkite materials has become a competitive topic for researchers especially related to the application in solar energy harvesting technology. Lead-free perovskite using tetravalent tin (Sn4+, Cs2SnI6) has attracted much attention compared to divalent tin (Sn2+, CsSnI3) because it is more stable and can be synthesized without using a glove box. The synthesis of this type of perovskite is often carried out using solution-based techniques because it allows for control of the size and shape of the perovskite. Previously, this type of perovskite was widely synthesized using a simple chemical solution method by reacting CsI and SnI4 at room temperature. However, this technique cannot control the size and shape of the perovskite. In the hot injection method, the size and shape of the resulting nanocrystals can be controlled by varying the reaction time between Cs-Oleate and the SnI4 complex at high temperatures.
The synthesis of Cs2SnI6 perovskite using the hot injection method is usually carried out in a low-pressure environment with an inert gas flowing. In this study, we synthesized Cs2SnI6 perovskite using the hot injection method with only N2 gas flowing. As a result, we obtain a dark brown paste precipitate that is green when irradiated with a 408 nm laser. Then we purified this precipitate using toluene and hexane (1:1). Furthermore, we performed characterization of Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Ultraviolet-Visible Spectroscopy (UV-Vis), Photoluminescence Spectroscopy (PL), Fourier Transform Infrared (FTIR), and Raman spectroscopy.
The SEM results show that the Cs2SnI6 perovskite has a spherical shape with an average diameter of about 0.70 &#956-m for the unpurified sample and 0.84 &#956-m for the purified sample. The XRD results show that the formed Cs2SnI6 perovskite has a cubic crystal structure for both unpurified and purified samples. In addition, the results of chemical characterization with FTIR and Raman spectroscopy show differences in vibration frequencies for the samples without purification and after purification due to the influence of the solvent and ligands involved. The results of optical characterization with UV-Vis spectroscopy and Photoluminescence show two specific peaks in samples without purification and purification. However, there is found the shifted in the absorbance peak towards a larger wavelength (red shift).

Keywords: Lead-free perovskite, Cs2SnI6 synthesis, Hot injection technique, Purification effects

Share Link | Plain Format | Corresponding Author (Hilarius Donatus Hun)


161 Material Physics ABS-113

Effect Milling Time on the Phase Formation and Magnetic Properties of Co0.75Ni0.25Ti0.975Y0.025O3 Sintered at 1000 C
Tesalonika Siregar (a,b), Yunasfi (b), Mashadi (b), Wisnu Ari Adi (b), Budhy Kurniawan (a*), Jan Setiawan (b*)

a) Departement of Physics, Universitas Indonesia, Depok 16424, Indonesia
b)Research Center for Advanced Material-National Research and Innovation Agency (BRIN), Complex Puspiptek Building 440-442, Tangerang South, Banten 15314, Indonesia
* budhy.kurniawan[at]sci.ui.ac.id, *jans002[at]brin.go.id


Abstract

This study investigates the effect of milling time on the phase formation and magnetic properties of Co0.75Ni0.25Ti0.975Y0.025O3 (CNTYO) synthesized via a solid-state reaction method and sintered at 1000 C. Stoichiometric amounts of Co3O4, NiO, TiO2, and Y2O3 powders were mixed and milled using High Energy Milling at 1000 rpm for 1, 3, 5, and 7 hours. X-ray diffraction (XRD) analysis revealed that a single-phase trigonal structure was fully formed after 5 hours of milling, while Y2O3 residues were still detected at 3 hours. Lattice parameter analysis confirmed structural stability with slight variations in unit cell volume and microstrain. Crystallite size calculated using the Williamson-Hall method decreased from 1021 nm (1 hour) to 862 nm (7 hours), accompanied by a reduction in microstrain from 9.5 x 10^-4 to 8.1 x 10^-4. Scanning Electron Microscopy (SEM) observations supported these findings, showing decreased grain size and improved homogeneity with prolonged milling time. The correlation between XRD, WH plot, and SEM results indicates that extended milling enhances densification and structural refinement. Magnetic measurements using a Vibrating Sample Magnetometer (VSM) demonstrated a decrease in saturation magnetization (Ms) from 0.569 emu/g to 0.541 emu/g and a reduction in coercivity (Hc) from 0.0103 Oe to 0.0020 Oe with increasing milling time. These reductions are attributed to weakened magnetic domain interactions caused by crystallite refinement and increased grain boundary area, which hinder domain wall movement. Overall, a milling time of 5 hours provides an optimal balance between phase formation, crystal structure stability, microstructural refinement, and controlled magnetic behavior.

Keywords: High energy milling- Phase Formation- Williamson-Hall method- Microstructure- Magnetic properties

Share Link | Plain Format | Corresponding Author (Tesalonika Siregar)


162 Material Physics ABS-114

Effect of Cu Doping on the Formation of Metastable Al2O3 Nanoparticles Synthesized through Plasma Arc
Imam Sholahuddin (1*), Rudy Soenoko (2), Djarot B. Darmadi (2), Lilis Yuliati (2), Haidzar Nurdiansyah (1)

1. Department of Mechanical Engineering, Jember University, Jember 68121, Indonesia
*imam.teknik[at]unej.ac.id
2. Department of Mechanical Engineering, Brawijaya University, Malang 65145, Indonesia


Abstract

We report the successful synthesis of Cu-doped metastable Al2O3 nanoparticles using a plasma arc technique, where Cu was introduced in situ via electrode erosion during high-temperature processing. The airflow rate of both plasma and carrier gas was introduced at 16 lpm and 5 lpm, respectively, to sustain the arc discharge and served as the primary oxidizing medium. The aluminum precursor was atomized, oxidized, and doped simultaneously at a feed rate of 6 g/min. EDX analysis and Rietveld refinement of XRD patterns confirmed Cu incorporation (2.1-4.0%) into the Al2O3 lattice. This Cu affects the difference in the increase of gamma-Al2O3 and theta-Al2O3, and decreases delta-Al2O3 phases at 14.1%, 8.1%, and 22.2%, respectively. These are changes due to the presence of minor Cu atoms occupying interstitial sites in the spinel lattice framework. The presence of polymorphic Al2O3 phase coexistence was also detected through SAED patterns, as exhibited by diffuse rings. The spatial distributions of Al2O3 phases revealed extending to the particle surface, suggesting the influence of uneven cooling rates during in-flight plasma processing, as shown by the Fast Fourier Transform examination of HR-TEM images. These findings demonstrate the role of minor Cu doping in tailoring metastable Al2O3 nanostructures through plasma arc, offering the functional properties for broader applications, with promise for scalable production of advanced materials.

Keywords: Metastable Al2O3- Cu dopant- Plasma arc- Polymorphic nanoparticles

Share Link | Plain Format | Corresponding Author (Imam Sholahuddin)


163 Material Physics ABS-116

A Comparative Analysis of Uncoated and PAN Nanofiber-Coated QCM Sensors for Volatile Organic Compound Sensing
Maria Gabriela Sabandar (a), Riris Sukowati (a), Dian Ahmad Hapidin (a), and Khairurrijal Khairurrijal (a,b,c, *)

(a) Department of Physics, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Jalan Ganesa 10, Bandung 40132, Indonesia
(b) University Center of Excellence - Nutraceutical, Bioscience, and Biotechnology Research Center, Bandung Institute of Technology, Jalan Ganesa 10, Bandung 40132, Indonesia
(c) Department of Physics, Faculty of Science, Sumatera Institute of Technology, Jalan Terusan Ryacudu, Way Huwi, Lampung 35365, Indonesia
*krijal[at]itb.ac.id


Abstract

Sensitive and selective detection of volatile organic compounds (VOCs) is crucial to support air quality monitoring and the implementation of sustainable development principles. In this study, a comparative study was conducted on the performance of a quartz crystal microbalance (QCM)-based gas sensor without coating (blank) and a QCM coated with electrospinning polyacrylonitrile (PAN) nanofibers. Five types of VOC gases were tested in this study, namely dimethylformamide (DMF), isopropyl alcohol (IPA), methanol, acetone, and tetrahydrofuran (THF). The test results showed that coating the QCM with PAN nanofibers significantly increased the sensitivity to all gases tested. QCM with PAN coating showed the highest sensitivity to methanol at 2.3539 Hz/ppm, followed by IPA (1.733 Hz/ppm), acetone (0.688 Hz/ppm), DMF (0.633 Hz/ppm), and THF (0.4647 Hz/ppm). In comparison, the sensitivity of QCM without coating to the five gases was 0.3386 Hz/ppm (methanol), 0.3496 Hz/ppm (IPA), 0.2624 Hz/ppm (acetone), 0.3186 Hz/ppm (DMF), and 0.4003 Hz/ppm (THF), respectively. These results indicate that the use of PAN nanofibers as a coating material improves sensor performance in detecting VOC gases, especially methanol and IPA, so it has the potential to be applied in a sustainable environmental monitoring system.

Keywords: Quartz crystal microbalance, PAN nanofiber, gas sensor, volatile organic compounds (VOC), sensitivity.

Share Link | Plain Format | Corresponding Author (Maria Gabriela Sabandar)


164 Material Physics ABS-118

Thermoelectric properties of Epoxy/SWCNT/Polyaniline ternary nanocomposite
Iswadi Ibrahim Patunrengi (1,2,3*), Ahmed Alshahrie (1), Numan Salah (2).

1 Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
2 Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
3 Department of Physics, Faculty of Science and Technology, Alauddin State Islamic University, Makassar 92118, Indonesia
*E-mail: : wadi.phys.dept[at]uin-alauddin.ac.id


Abstract

In this study, highly conductive single-walled carbon nanotubes (SWCNTs) were employed to establish a conductive network within an epoxy matrix, resulting in the formation of an epoxy/SWCNT nanocomposite with a 4 wt. percent SWCNT loading. To further enhance its electrical performance, the nanocomposite was subsequently incorporated with 3 wt. percent polyaniline (PANI). The thermoelectric (TE) properties of the nanocomposites, both before and after PANI addition, were systematically investigated over a temperature range of 243 K to 348 K. Additionally, power output was evaluated under temperature differentials of 25, 45, and 65 K, at conditions near and slightly above room temperature. Initially, the epoxy/SWCNT nanocomposite exhibited electrical conductivities of 7.51 S/m at 243 K and 9.18 S/m at 348 K, with corresponding Seebeck coefficients of 66 microV/K and 91 microV/K, respectively. The measured power outputs under &#916-T values of 25, 45, and 65 K were 6.20, 11.18, and 18.0 nW, respectively, using a small-leg TE module. Upon the incorporation of PANI, all key thermoelectric parameters, except for the Seebeck coefficient, exhibited notable improvements. The electrical conductivity significantly increased to 224.848 S/m at 243 K and 313.702 S/m at 348 K, while the Seebeck coefficients slightly decreased to 52 microV/K and 56 microV/K, respectively. Correspondingly, the power output demonstrated a general enhancement across all tested temperature differentials. These results clearly indicate that PANI effectively reinforces the thermoelectric performance of the epoxy/SWCNT nanocomposite, underscoring its potential as a promising filler for polymer-based thermoelectric materials

Keywords: TE Properties, Epoxy, SWCNT, Polyanniline, & Nanocomosite.

Share Link | Plain Format | Corresponding Author (Iswadi Ibrahim Patunrengi)


165 Material Physics ABS-119

Analysis of Physical - Chemical Properties and Variation of Rare Earth Elements in Ciuyah Mud Volcano and Supported by SEM and XRD Data to Bolster Advanced Materials Industry in Indonesia
Fina Nurfaradila (a*), Eleonora Agustine (b), Sartono (b), Amira Sasanti Nugroho Putri (b), Krishna Agra Pranatikta (c)

a)Department of Physisc, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Jl. Ir. Soekarno, Km. 21, Jatinangor, Sumedang Regency, 45363, West Java, Indonesia
*) fina19001[at]mail.unpad.ac.id
b)Department of Geophysics, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Jl. Ir. Soekarno, Km. 21, Jatinangor, Sumedang Regency, 45363, West Java, Indonesia
c)Department of Geophysical Engineering, Institut Teknologi Bandung, West Java, Indonesia


Abstract

A mud volcano is a geological phenomenon that emerges on the earth^s surface when mud material is ejected due to excess pressure, buoyancy, and temperature variations from beneath the earth^s surface. Located in West Java, the Ciuyah Mud Volcano serves as a fascinating site for scientific exploration. With its unique characteristics and geological features, this mud volcano presents an intriguing opportunity for researchers to deepen their understanding of the earth^s processes. The material ejected by mud volcanoes, including Ciuyah Mud Volcano, contains a wealth of minerals, elements, and salt potential crucial for scientific investigation or livelihoods. Of particular interest is the presence of rare earth elements, which are significant for research due to their potential as important raw materials for modern technology. Exploring these elements within the material of the mud volcano could provide valuable insights into the earth^s composition and inform future research endeavors. This study aims to determine the physical-chemical properties of a mud volcano using the electrical method with parameters such as EC and VWC of the mud, EC and TDS of water, as well as variations in the distribution of REE using XRF and ICP-OES tests. Additionally, the study aims to obtain the distribution of salt and metals using SEM and XRD tests. The results of the study indicate that Ciuyah Mud Volcano contains conductive minerals due to the high EC and VWC values in the mud samples, as well as elevated TDS and salinity levels. The XRF and ICP-OES tests reveal the potential presence of REE, with 12 elements discovered including Ce, Dy, Eu, Gd, Ho, La, Nd, Pr, Sm, Tb, Sc, and Y. SEM and XRD test results from the salt Ciuyah Mud Volcano sample show Halite and Helvite mineralogy with a hexagonal shape and large crystal grains. The potential REE could support the advanced material industry and clean energy in Indonesia, as well as identify salt potential and hot spring manifestations that can be utilized by local communities, including as beauty salt.

Keywords: Ciuyah Mud Volcano- rare earth elements- ICP-OES- SEM- XRD- XRF

Share Link | Plain Format | Corresponding Author (Fina Nurfaradila)


166 Material Physics ABS-122

Comparative Study of the Incorporation of Gold and Silver Nanoparticles into N-719 Dye on the Performance of Dye-Sensitized Solar Cell (DSSC)
Hawinda Restu Putri(a), Hilarius Donatus Hun(a), Setiya Rahayu(a), Herman(a), Priastuti Wulandari(a*)

a) Physics of Magnetism and Photonics Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung, West Java, Indonesia
*pwulandari[at]itb.ac.id


Abstract

The Dye-Sensitized Solar Cell (DSSC) is a promising third-generation solar cell technology with many advantages. Recent strategies to improve DSSC efficiency include incorporating metal nanoparticles into the dye. This research aims to compare the incorporation of gold and silver nanoparticles capped with 3-Mercaptopropionic Acid (AuMPA or AgMPA) into N-719 dye in order to enhance DSSC performance. Metal nanoparticles exhibit a unique optical property called Localized Surface Plasmon Resonance (LSPR), which maximize light absorption. In our experiment, AuMPA and AgMPA were prepared using the chemical reduction method, then incorporated into the dye solution before the TiO2 photoanode was immersed and the DSSC assembled. Optical characterization, including absorbance and photoluminescence spectra, shows a blue shift in the spectral position and an overlap between the intrinsic peak of N-719 and the plasmonic peak of AuMPA or AgMPA, indicating a stable nanoparticle dispersion within the dye matrix. Fourier Transform Infrared (FTIR) spectroscopy results confirm chemical interaction through changes in the S-H and -COOH vibrations. Scanning Electron Microscopy (SEM) observation reveal the presence and growth of AuMPA and AgMPA nanoparticles within the mesoporous TiO2 layer. The addition of AuMPA into the dye solution increases the PCE of the device from 3.32% to 4.19%, while AgMPA yielded a PCE of 3.76%. Enhancement of our DSSC performance is attributed to the LSPR effect, which enhances light absorption and charge transport. The better performance by additition of AuMPA into dye is attributed to a high substantial plasmonic effect and stability, while AgMPA tends to aggregate, limiting its effectiveness.

Keywords: dye-sensitized solar cell-gold nanoparticles- silver nanoparticles- dye N-719

Share Link | Plain Format | Corresponding Author (Hawinda Restu Putri)


167 Material Physics ABS-124

Effect of Annealing Techniques on the Thermoelectric Properties of Molybdenum Disulfide Thin Films Prepared by RF Sputtering
Irasani Rahayu1, Mekhala Insawang2,3, Athorn Vora-ud2,3 , Tosawat Seetawan2,3, Iim Fatimah1, Yono Hadi Pramono1, Melania Suweni Muntini1*

1 Instrumentation and Electronic Laboratory, Department of Physics, Institute Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia
2Program of Physics, Faculty of Science and Technology, Sakon Nakhon Rajabhat University, 680 Nittayo Road, Mueang District, Sakon Nakhon, 47000, Thailand
3Center of Excellence on Alternative Energy, Research and Development Institute, Sakon Nakhon Rajabhat University, 680 Nittayo Road, Mueang District, Sakon Nakhon, 47000, Thailand


Abstract

Innovation in renewable energy, such as thermoelectric technology, is key to meeting the growing energy demand without harming the environment. The use of thermoelectric materials in renewable energy systems enables the direct conversion of heat into electricity, thereby enhancing energy efficiency and sustainability. Molybdenum disulfide, a transition metal dichalcogenide, shows great potential for applications in thermoelectric devices. The advancement of 2D material fabrication technologies supports the development of materials suitable for thermoelectric applications. One possible method is Physical Vapor Deposition (PVD), which can be implemented using the sputtering technique. Heat treatment of thin-film materials affects their structural, electronic, and thermoelectric properties. One effective approach for this treatment is annealing using a furnace. The MoS2 material is deposited using the Radio Frequency Sputtering under base pressure conditions below 2.2x10-3 Pa and a working pressure of 1.3 Pa. The deposition of MoS2 thin films was performed at room temperature with an argon gas flow of 53.5 sccm. The MoS2 thin films were deposited using the RF Sputtering method with a deposition time of approximately 30 minutes and a fixed power of 200 watts. After deposition, the MoS2 thin films underwent heat treatment using Quartz Tube Furnace before testing. Based on the test results, the thermoelectric characteristics were determined, including the resistivity and Seebeck coefficient . The resistivity of the MoS2 thin film was lowest when heated to 600 C, measuring 1.82 x 10-3 Ohm m at 50 C. The resistivity is inversely proportional to the measurement temperature on the ZEM3 machine. The Seebeck coefficient has a negative value, indicating that the MoS2 thin film contains charge carriers, with a value of -3.54 x 10-4 V/K at 50 C. Based on the resistivity and Seebeck coefficient values, the power factor was calculated as 1.29 x10-4 W/mK2 at 50 C.

Keywords: MoS2, Quartz Tube Furnace , RF Sputtering, Thermoelectric, Thin Film

Share Link | Plain Format | Corresponding Author (Irasani Rahayu)


168 Material Physics ABS-130

Karakterisasi Morfologi dan Komposisi Lapisan Ni-TiN-AlN-Al2O3 dengan Variasi Rapat Arus Pulsa
Rangga Aditya Pratama1*), Esmar Budi 1) Teguh Budi Prayitno 1)

1) Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta. Jakarta, Indonesia
Jl. Pemuda No. 10, Rawamangun, Jakarta
*rangga.a.pratama.18[at]gmail.com


Abstract

Penelitian ini dilakukan dengan membentuk lapisan komposit Ni-TiN-AlN-Al2O3 yang disintesis pada substrat tungsten karbida (WC) melalui metode elektrodeposisi. Tujuan utama dari penelitian ini adalah untuk menganalisis pengaruh variasi rapat arus pulsa terhadap morfologi dan komposisi lapisan yang dihasilkan. Proses pelapisan dilakukan dengan variasi rapat arus pulsa sebesar 0,3 , 0,4 , dan 0.5 mA/mm^2 selama 30 menit, dengan laju pengadukan 600 rpm pada suhu 40 C. Karakterisasi morfologi dan komposisi dilakukan menggunakan Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS). Hasil karakterisasi menunjukkan bahwa rapat arus 0,4 mA/mm^2 menghasilkan struktur mikro terbaik, ditandai oleh permukaan yang homogen, distribusi partikel yang merata, serta minimnya cacat seperti aglomerasi dan retakan mikro. Sebaliknya, pada rapat arus 0,3 mA/mm^2 ditemukan permukaan kasar dengan aglomerat besar dan distribusi partikel yang tidak seragam, sedangkan pada arus 0,5 mA/mm^2 terjadi pertumbuhan partikel yang tidak terkendali akibat laju deposisi yang terlalu tinggi. Dengan demikian, dapat disimpulkan bahwa arus 0,4 mA/mm^2 merupakan parameter optimal untuk menghasilkan lapisan komposit dengan kualitas morfologi dan struktur mikro yang unggul, yang berpotensi meningkatkan kekuatan mekanik dan daya rekat lapisan.

Keywords: Lapisan komposit Ni-TiN-AlN-Al2O3, Elektrodeposisi, Rapat arus pulsa, Morfologi

Share Link | Plain Format | Corresponding Author (Rangga Aditya Pratama)


169 Material Physics ABS-134

Pengaruh Variasi Rapat Arus Pulsa terhadap Morfologi Lapisan Komposit Ni-Al2O3/Si3N4 Dengan Metode Elektrodeposisi
Najmi Syahro Fadhlan (a*), Esmar Budi (b), Teguh Budi Prayitno (b)

(a) Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta. Jakarta, Indonesia
(b) Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta. Jakarta, Indonesia


Abstract

Penelitian ini mengkaji pengaruh variasi rapat arus pulsa terhadap pembentukan lapisan komposit Ni-Al2O3/Si3N4 menggunakan metode elektrodeposisi. Penelitian ini berfokus pada bagaimana arus memengaruhi morfologi lapisan komposit. Variasi rapat arus yang digunakan yaitu 0,3 mA/mm2, 0,4 mA/mm2, dan 0,5 mA/mm2. Proses elektrodepisisi menggunakna kecepatan pengadukan 600 rpm pada suhu 40 C selama 30 menit. Karakterisasi Scanning Microscopy (SEM) digunakan untuk mrnganalisis morfologu permukaan lapisan yang terbentuk. Hasil karakterisasi menunjukan bahwa pada rapat arus pulsa 0,3 mA/mm2 permukaan lapisan yang terbentuk menujukkan morfologi yang kasar, sebaran partikel yang tidak seragam, dan terbentuk aglomerasi. Pada rapat arus 0,4 mA/mm2 permukaan lapisan yang terbentuk menunjukkan morfologi yang lebih halus walaupun terbentuk jarak antar batas butir dan aglomerasi. Pada rapat arus 0,5 mA/mm2 permukaan lapisan yang terbentuk menunjukkan morfologi yang kasar, sebaran yang tidak seragam, dan aglomerasi pada permukaan.

Keywords: Ni-Al2O3/Si3N4, Elektrodeposisi, Rapat Arud Pulsa, Morfologi, SEM

Share Link | Plain Format | Corresponding Author (Najmi Syahro Fadhlan)


170 Material Physics ABS-136

ANALISIS PENGARUH VARIASI RAPAT ARUS PULSA TERHADAP MORFOLOGI LAPISAN Ni-AlN-Al2O3 HASIL ELEKTRODEPOSISI
Fatimah Haura1) Esmar Budi2) Teguh Budi Prayitno3)

1) Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta, Indonesia
2) Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta, Indonesia
3) Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta, Indonesia


Abstract

Keywords: Lapisan komposit Ni-AlN-Al2O3, Elektrodeposisi, Rapat arus, Morfologi, Komposisi.

Share Link | Plain Format | Corresponding Author (Fatimah Haura)


171 Material Physics ABS-138

PENGARUH VARIASI RAPAT ARUS PULSA TERHADAP MORFOLOGI LAPISAN KOMPOSIT Ni-TiN-Al2O3 DENGAN METODE ELEKTRODEPOSISI
Salsabila Putri Hayati 1), Esmar Budi 2), Teguh Budi Prayitno 2)

1) Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta, Jakarta, Indonesia.
2) Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta, Jakarta, Indonesia.


Abstract

Penelitian ini bertujuan untuk mengkaji morfologi permukaan lapisan komposit Ni-TiN-Al2O3 yang dibentuk melalui metode elektrodeposisi arus pulsa pada substrat tungsten karbida. Variasi rapat arus pulsa yang digunakan adalah 0,3 mA/mm2, 0,4 mA/mm2, dan 0,5 mA/mm2. Karakterisasi morfologi dilakukan menggunakan Scanning Electron Microscopy (SEM) untuk mengetahui pengaruh variasi rapat arus terhadap kualitas permukaan lapisan. Hasil pengamatan menunjukkan pada rapat arus 0,3 mA/mm2, permukaan lapisan terlihat tidak merata dengan aglomerasi partikel halus, sedangkan pada 0,4 mA/mm2 morfologi tampak lebih padat dan distribusi partikel lebih seragam. Rapat arus 0,5 mA/mm2 menghasilkan permukaan paling homogen dan terstruktur, dengan ukuran partikel yang relatif seragam serta bentuk yang lebih terdefinisi. Hasil ini menunjukkan bahwa 0,5 mA/mm2 merupakan kondisi optimal untuk memperoleh morfologi lapisan terbaik melalui proses elektrodeposisi.

Keywords: lapisan komposit Ni-TiN-Al2O3, elektrodeposisi, rapat arus pulsa, Scanning Electron Microscopy (SEM), morfologi permukaan

Share Link | Plain Format | Corresponding Author (Salsabila Putri Hayati)


172 Material Physics ABS-140

Analisis Pengaruh Variasi Rapat Arus Pulsa Terhadap Morfologi Dan Komposisi Lapisan Komposit Ni-TiN-Al2O3/Si3N4 Dengan Metode Elektrodeposisi
Fiona Fatiha (a*), Esmar Budi (b), Teguh Budi Prayitno (b)

(a) Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, Indonesia.
*piyonapatiha[at]gmail.com
(b) Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, Indonesia.


Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh variasi rapat arus pulsa terhadap morfologi lapisan komposit Ni-TiN-Al2O3/Si3N4 dengan metode elektrodeposisi. Proses pelapisan dilakukan dengan rapat arus pulsa sebesar 0,3 mA/mm2, 0,4 mA/mm2 dan 0,5 mA/mm2, dilakukan selama 30 menit dengan suhu 40 derajat celcius dan laju pengadukan 600rpm. Selanjutnya dilakukan karakterisasi Scanning Electron Microscopy - Energy Dispersive Spectroscopy (SEM-EDS) untuk menganalisis morfologi. Hasil penelitian menunjukkan pada arus 0,3 mA/mm2, permukaan terlihat kasar dan tidak homogen dengan distribusi butiran yang tidak merata. Terdapat area gelap yang mengindikasikan adanya aglomerasi partikel atau daerah yang belum terlapisi sempurna. Pada arus 0,4 mA/mm2 permukaan mulai menunjukkan struktur yang lebih padat. Ukuran butiran relatif lebih kecil dari rapat arus sebelumnya dan penyebarannya tampak lebih merata, meskipun masih terlihat adanya aglomerasi. Pada arus 0,5 mA/mm2, morfologi permukaan menunjukkan struktur yang lebih halus dan seragam di antara ketiganya. Distribusi partikel tampak lebih merata, ukuran butiran lebih kecil dan lebih compact. Terbentuknya lapisan komposit Ni-TiN-AL2O3/Si3N4 dikonfirmasi melalui identifikasi unsur Ni, Ti, Al, dan Si dalam hasil analisis EDS.

Keywords: Lapisan komposit Ni-TiN-AL2O3/Si3N4- Rapat arus pulsa- Elektrodeposisi- Morfologi permukaan

Share Link | Plain Format | Corresponding Author (Fiona Fatiha)


173 Material Physics ABS-144

The Effect of Hydrothermal Temperature Variations in the Synthesis of Copper (II) Oxide Nanoparticles in CuO-doped TiO2 Photoanode Fabrication on the Performance of Dye Sensitized Solar Cells (DSSCs)
Bramasto Arista Wibisono, Agus Supriyanto, Risa Suryana

Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret, Jalan Ir. Sutami 36 A, Kentingan, Surakarta 57126, Indonesia
Emails: bramastowibisono[at]student.uns.ac.id, agusf22[at]staff.uns.ac.id, rsuryana[at]staff.uns.ac.id


Abstract

DSSC is a third-generation solar cell developed as a renewable energy solution. Doping is one method used to overcome the low efficiency of DSSC. This study investigates the effect of hydrothermal temperature variations in the synthesis of Copper(II) Oxide (CuO) as a doping material in the fabrication of CuO-doped TiO2 photoanodes. CuO was synthesized using hydrothermal methods at temperatures of 160 deg C, 180 deg C, and 200 deg C. The resulting CuO nanoparticles had particle sizes of 18 nm, 16 nm, and 12 nm with a monoclinic crystal structure and corresponding crystal sizes of 13.90 nm, 21.33 nm, and 22.29 nm. CuO-doped TiO2 exhibited particle sizes of 27 nm, 20 nm, and 17 nm, with the same crystal size values. FTIR analysis confirmed the presence of Cu-O bonds in CuO and both Cu-O and Ti-O-Ti bonds in CuO-doped TiO2. The UV-Visible spectroscopy results showed maximum absorbance at wavelengths of 280 nm for CuO and 276 nm for CuO-doped TiO2. The measured band-gap of CuO ranged between 1.2 eV and 1.4 eV, while that of CuO-doped TiO2 was between 3.2 eV and 3.9 eV, indicating a band-gap increase. The highest DSSC efficiency using CuO-doped TiO2, measured with an I-V meter, was 0.023 percent at CT180. Based on the results, it can be concluded that the fabrication of DSSC photoanodes from CuO synthesized through hydrothermal variation and incorporated into TiO2 does not significantly enhance DSSC efficiency.

Keywords: CuO, TiO2, CuO - doped - TiO2 , Particle size, Crystal size, Band-gap, DSSC performance

Share Link | Plain Format | Corresponding Author (Agus Supriyanto)


174 Material Physics ABS-150

Preparation and Characterization of the Magnetic Properties of Barium Hexaferrite via the Solid-State Reaction Method
Nazaruddin Nasution(a),Syahrul Humaidi(a*), Erna Frida(a),Marzuki Naibaho(bc), 3Masno Ginting(b)

a)Department of Physics, Universitas Sumatera Utara, Medan, 20155, Indonesia
*syahrul1[at]usu.ac.id
b)Department of Physics, Faculty of Mathematics and Natural Science, Universitas Indonesia, Depok 16424, Indonesia
c)Center for Advanced Materials Research (PRMM) - National Research and Innovation Agency (BRIN), Complex Puspiptek Building 440-441, Tangerang-South, Banten,15314 Indonesia.


Abstract

Barium Hexaferrite is a magnetic material with significant potential for various industrial applications, including data storage devices, loudspeakers, and electromagnetic wave absorbers. This study aims to synthesize and characterize the magnetic properties of Barium Hexaferrite produced via the solid-state reaction method using mortar and High Energy Milling (HEM) techniques. Characterization was carried out using X-RayDiffraction (XRD), Scanning Electron Microscope (SEM), and Vibrating Sample Magnetometer (VSM). XRD results indicate that the hexagonal crystal structure of Barium Hexaferrite remains intact with stable lattice parameters. SEM analysis reveals a uniform particle morphology with sizes ranging from 2 to 4 micro meter. VSM testing shows that the sample prepared using the mortar technique (BHX-M) exhibits a saturation magnetization (Ms) of 51.03 emu/g, while the HEM technique (BHX-HEM) yields a value of 50.40 emu/g. The coercivity (Hc) of BHX-M is higher (0.32 T) than that of BHX-HEM (0.30 T), indicating that the synthesis technique influences the magnetic properties. This study confirms that the solid-state reaction method can produce Barium Hexaferrite with magnetic properties suitable for commercial applications and advanced technology.

Keywords: Barium hexaferrite, solid-state reaction, structure, morphology, magnetic properties

Share Link | Plain Format | Corresponding Author (Nazaruddin Nasution)


175 Material Physics ABS-151

The effect of adding perlite to unfired and fired geopolymer concrete made from fly ash and perlite on pore distribution and compressive strength
F M Farida V T Fauziastuti T Bambang A K Yusmaniar and M F Fikri

Universitas Negeri Jakarta


Abstract

Creep occurs in burned material
It made a decrease in yield strength and elasticity modulus
In this study five compositions of fly ash and perlite-based concrete geopolymer have been burned for 900 degree Celcius for 2 hours
The distribution of pore decreases for both unburned and burned concrete geopolymer is observed
One of the strength of concrete geopolymer indicator is compressive strength
Both of the results of compressive strength and the pore distribution are conducted through experimental study
Bet method has been used to measure pore volume of it
UTM machine has been used to calculate compressive strength
It is found that the addition of perlite to fly ash-based geopolymer concrete will increase the pore distribution value of unburned geopolymer concrete On the other hand, the summation of perlite to fly ash-based geopolymer concrete will decrease the pore distribution value of burned geopolymer concrete

Keywords: geopolymer compressive strength pore distribution passive fire protection

Share Link | Plain Format | Corresponding Author (Fransisca Maria Farida)


176 Material Physics ABS-163

Determination of K And L X-ray Intensity Ratios in Some Inorganic Compounds at 22.581 keV
Mehak Khatkar and Dr. Vandana Sharma

Department of Physics, NIET, Nims University Rajasthan, Jaipur

Department of Physics, Maharishi Markandeshwar deemed to be University, Mullana, Ambala


Abstract

In the present research, relative K&#945- / K&#946- intensity ratios and L&#945- / Lk (k = l, &#946-, &#946-I, II, III ) intensity ratios were measured at Silver(Ag) K X-rays of energy 22.581 keV for inorganic compounds such as Potassium Chromate (K2CrO4), Calcium Sulphide (CaS), Zinc Acetate (C2H3O2)2) for K X-ray intensity ratio and Barium Acetate (BaC4H6O4), Mercuric Chloride (HgCl2), Lead Acetate Trihydrate (Pb(C2H3O2)2 . 3H2O) for L X-ray intensity ratio. A comparison is made with the provided theoretical data of the pure targets. A fairly good agreement is observed with theoretical and experimental data wherever available.

Keywords: Intensity Ratio, K x-rays, L x-rays, Inorganic Compounds

Share Link | Plain Format | Corresponding Author (Mehak Khatkar)


177 Material Physics ABS-166

Tuning Ionic Conductivity and Stability in Perovskite-Derived Hydrides via Fluorine Substitution
Nur Ika Puji Ayu (a), Naoki Matsui (b), Ryoji Kanno (b), Takashi Kamiyama (c)

(a) Universitas Indonesia
(b) Research Center of All-Solid-State Battery, Institute of Innovation Research, Tokyo Institute
of Technology, Yokohama
(c) Neutron Science Division (KENS), Institute of Materials Structure Science, High Energy
Accelerator Research Organization (KEK), Ibaraki


Abstract

The hydride ion (H-) conducting properties of SrMgH4, which adopts a BaZnF4-type perovskite-derived structure. The hydride ion conductivity of SrMgH4 was demonstrated to be a relatively high value of 5 x 10-5 S cm-1 at 200 oC. Fluorine substitution described as SrMgH4-xFx was also examined to enhance its stability against air. Samples were synthesized via mechanochemical, then the sample purity was verified by X-ray diffraction (XRD). Neutron diffraction (ND) at J-PARC BL09 SPICA was collected to provide structural information. Rietveld analysis using neutron powder diffraction data of SrMgHF3 (x=3) revealed the disordering of fluoride and hydride ions. While fluorine substitution reduced ionic conductivity, SrMgH2F2 and SrMgHF3 show enhanced air stability. These findings demonstrate how controlled anion disorder can optimize the balance between conductivity and stability in hydride-ion-conducting materials.

Keywords: Hydrides, ionic conductor, air stability

Share Link | Plain Format | Corresponding Author (Nur Ika Puji Ayu)


178 Material Physics ABS-169

Accelerated Lattice Thermal Conductivity calculations for (\alpha-CX) (X=N, P, As) using a combination of Density Functional Theory, Machine Learning, and Molecular Dynamics
Muhammad Shaquille Hisham (a*), Nisrina Nindya (b), Irfan Dwi Aditya (a), Sparisoma Viridi (a), Nadya Amalia (c), Sasfan Arman Wella (c)

a) Department of Physics, Bandung Institute of Technology, Bandung, Indonesia
*10221055[at]mahasiswa.itb.ac.id
b) Department of Physics, Sepuluh Nopember Institute of Technology, Surabaya, Indonesia
c) Quantum Physics Research Center, BRIN, Serpong, Indonesia


Abstract

The growing potential of carbon pnictide (\alpha-CX) monolayers in optoelectronic and photovoltaic applications has sparked interest in their thermoelectric properties. One of the crucial properties in thermoelectric device performance is lattice thermal conductivity (LTC) which reflects how well the heat is conducted through phonons. However, accurate LTC calculations using conventional method such as density functional theory (DFT) are highly time consuming. To address this, a machine learning (ML) based approach was implemented to generate force fields that can be used in molecular dynamics (MD) simulations, which significantly reduces computational cost and data requirements. LTC was calculated for (\alpha-CX) using partial training data and a dataset consisting of different dimensions which consist of 20 random displacements. The result shows that for (\alpha-CX) ML models produced accurate LTC values while halving the data requirements and achieved up to six times faster calculations. This demonstrates the efficiency and reliability for thermoelectric property predictions in materials using ML based approach.

Keywords: (\alpha-CX) monolayers, density functional theory, machine learning, molecular dynamics, thermoelectric

Share Link | Plain Format | Corresponding Author (Muhammad Shaquille Hisham)


179 Material Physics ABS-171

Overview of Transparent Conducting Electrodes for Hybrid Perovskite Solar Cells
Tanti Dewinggih(a*), Reza Farel Ramdhani(a)

a) Department of physics, UIN Sunan Gunung Djati,
Jalan AH Nasution No.105, Bandung 40614, Indonesia
*dewinggih.tanti[at]uinsgd.ac.id


Abstract

Transparent conducting electrodes (TCEs) are incomparable class of materials that have outstanding optical transmission of electromagnetic wave in the visible light spectrum combined with very high conductivity at room temperature. They are required components in optoelectronic devices, such as solar cells, touch screen and displays. TCEs are essential for light transmission, collection and transport of charge carriers in photovoltaics. TCM act crucial role in hybrid Perovskite Solar Cells (PSCs), influencing their stability, efficiency and cost-effectiveness. The most popular used TCEs are transparent conducting oxides (TCOs), such as indium tin oxide (ITO) and fluorine-doped tin oxide (FTO), but alternatives are being explored to address issues related to cost, flexibility, and material scarcity. Graphene and carbon nanotubes (CNTs) are material alternatives as Carbon-based TCEs. In this article will explore the fundamental optical and electrical properties of TCEs, highlight the challenges, innovations and potential future research directions.

Keywords: Keywords: transparent conductive materials, transparent conducting electrodes, hybrid perovskite solar cells, photovoltaics, transparent conductive oxide, graphene, carbon nanotubes, silver nanowires, TCO-free.

Share Link | Plain Format | Corresponding Author (Tanti Dewinggih)


180 Material Physics ABS-173

Effect Milling Time on the Phase Formation and Magnetic Properties of Co0.75Ni0.25Ti0.975Y0.025O3 Sintered at 1000 C Sample Abstract
Tesalonika Siregar (a,b), Yunasfi (b), Mashadi (b), Wisnu Ari Adi (b), Budhy Kurniawan (a*), Jan Setiawan (b*)

a) Departement of Physics, Universitas Indonesia, Depok 16424, Indonesia
b)Research Center for Advanced Material-National Research and Innovation Agency (BRIN), Complex Puspiptek Building 440-442, Tangerang South, Banten 15314, Indonesia
* budhy.kurniawan[at]sci.ui.ac.id, *jans002[at]brin.go.id


Abstract

This study investigates the effect of milling time on the phase formation and magnetic properties of Co0.75Ni0.25Ti0.975Y0.025O3 (CNTYO) synthesized via a solid-state reaction method and sintered at 1000 C. Stoichiometric amounts of Co3O4, NiO, TiO2, and Y2O3 powders were mixed and milled using High Energy Milling at 1000 rpm for 1, 3, 5, and 7 hours. X-ray diffraction (XRD) analysis revealed that a single-phase trigonal structure was fully formed after 5 hours of milling, while Y2O3 residues were still detected at 3 hours. Lattice parameter analysis confirmed structural stability with slight variations in unit cell volume and microstrain. Crystallite size calculated using the Williamson-Hall method decreased from 1021 nm (1 hour) to 862 nm (7 hours), accompanied by a reduction in microstrain from 9.5 x 10^-4 to 8.1 x 10^-4. Scanning Electron Microscopy (SEM) observations supported these findings, showing decreased grain size and improved homogeneity with prolonged milling time. The correlation between XRD, WH plot, and SEM results indicates that extended milling enhances densification and structural refinement. Magnetic measurements using a Vibrating Sample Magnetometer (VSM) demonstrated a decrease in saturation magnetization (Ms) from 0.569 emu/g to 0.541 emu/g and a reduction in coercivity (Hc) from 0.0103 Oe to 0.0020 Oe with increasing milling time. These reductions are attributed to weakened magnetic domain interactions caused by crystallite refinement and increased grain boundary area, which hinder domain wall movement. Overall, a milling time of 5 hours provides an optimal balance between phase formation, crystal structure stability, microstructural refinement, and controlled magnetic behavior.

Keywords: High energy milling- Phase Formation- Williamson-Hall method- Microstructure- Magnetic properties

Share Link | Plain Format | Corresponding Author (Tesalonika Siregar)


Page 6 (data 151 to 180 of 294) | Displayed ini 30 data/page
<< PREV 1 2 3 4 5 6 7 8 9 10 NEXT >>

IPS 2025 - Conference Management System

Powered By Konfrenzi Ultimate 1.832M-Build8 © 2007-2025 All Rights Reserved