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All Journal JPSE (Journal of Physical Science and Engineering) Science and Technology Indonesia KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Indonesian Physical Review Dedikasi: Jurnal Pengabdian Masyarakat Jurnal Teras Fisika : Teori, Modeling, dan Aplikasi Fisika MASALIQ: Jurnal Pendidikan dan Sains Newton-Maxwell Journal of Physics Jurnal Pengabdian Inovasi Masyarakat Indonesia Narra X Classroom Experiences Socio-Economic and Humanistic Aspects for Township and Industry Frontier Advances in Applied Science and Engineering Education Specialist Media for Empowerment, Mobilization, and Innovation in Research & Community
Kormil Saputra
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Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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A scoping review of potential biomaterials as optimal platforms for triboelectric nanogenerators Saputra, Kormil; Khuzaima, Nabila D.; Melani, Melani; Wahyudin, Wahyudin; Madani, Awanda OP.
Narra X Vol. 3 No. 2 (2025): August 2025
Publisher : Narra Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52225/narrax.v3i2.214

Abstract

The increasing human reliance on electricity, driven by rapid technological advancement, continues to depend largely on non-renewable fossil fuels, raising critical concerns about energy sustainability and environmental degradation. This study aims to explore the potential of biomaterials as alternative platforms for enhancing the performance of Triboelectric Nanogenerators (TENGs), using a scoping review approach. A systematic literature review was conducted utilizing the Scopus, Crossref, and Google Scholar databases, guided by the PRISMA Extension for Scoping Reviews (PRISMA-ScR) framework. Relevant studies were analyzed based on publication trends, types of biomaterials employed, synthesis methods, operational mechanisms, and key electrical output parameters. The findings indicate that biomaterials such as cellulose, chitosan, and natural proteins exhibit promising triboelectric properties, contributing to improvements in energy conversion efficiency, biocompatibility, and operational stability of TENGs. Further research is recommended to optimize material structures and surface modifications to enhance charge transfer mechanisms. Additionally, the incorporation of carbon-based materials such as graphene and MXene with biomaterials has demonstrated significant potential to amplify device performance. This review also underscores the wide-ranging applications of biomaterial-based TENGs in wearable electronics, biomedical sensing, and eco-friendly energy systems. Overall, this study provides a comprehensive overview and valuable insights into the strategic role of biomaterials in advancing next-generation green energy technologies.
COMPARATIVE BEHAVIOR OF MAGNETIC IRON OXIDE NANOPARTICLES (MIONS) VIA MECHANICAL AND CHEMICAL ROUTES Fajariman, Ilham Dias; Hidayat, Arif; Diantoro, Markus; Laksono, Yoyok Adi Setio; Wulandari, Nurul Putri; Chusna, Nadiya Miftachul; Yuliana, Futri; Saputra, Kormil; Sunaryono, Sunaryono
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.407

Abstract

This study successfully synthesized Magnetic Iron Oxide Nanoparticles (MIONs) through two different processes, namely mechanical synthesis (MIONs – M) and chemical synthesis (MIONs – N). The synthesized samples were characterized using X-Ray Fluorescence (XRF), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and Vibrating Sample Magnetometer (VSM) to determine the elemental composition, morphology, structure, and magnetization of the samples. XRF analysis revealed that iron (Fe) dominated both samples, with concentrations reaching 93.91% for MIONs – M and 89.91% for MIONs – N. SEM morphological analysis showed that the MIONs tended to be spherical and experienced agglomeration, with particle size distribution around 120 nm for MIONs – M and 30 nm for MIONs – N. XRD data indicated that both samples exhibited a cubic spinel Fe3O4 phase, consistent with the AMCSD 0000945 model data. Using the refinement method and Debye-Scherrer equation, the crystallite size and density of MIONs – M were found to be larger than MIONs – N. This correlates with VSM data analysis, where the saturation magnetization of MIONs – M (49.51 emu/g) was greater than that of MIONs – N (26.54 emu/g). These results provide important insights into the characteristics of MIONs and their implications for technological and industrial applications.
Optical Property Enhancement in Cobalt Doped Magnetite Nanoparticles Evaluated with UV Vis Tauc and Urbach Saputra, Kormil; Ika Umratul Asni Aminy; Rahmatun Inayah; Teguh Ardianto; Dian W. Kurniawidi
Newton-Maxwell Journal of Physics Vol. 6 No. 2: Oktober 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/nmj.v6i2.44047

Abstract

Magnetite (Fe3O4) is a spinel-based material that has broad potential in various applications, one of which is for magneto-optics. However, the value of the energy gap obtained from magnetite is too small to be applied. Efforts to improve these characteristics are carried out through transition metal ion doping techniques, one of which is cobalt (Co2+) which is known to modify the electronic structure and stabilize the crystal lattice. This study aims to analyze the optical properties of magnetite nanoparticles that have been doped with Co2+ through energy gap and Urbach energy calculations. The synthesis of Co0.125Fe2.875O4 was carried out using the coprecipitation method. Furthermore, characterization was carried out using UV–Vis spectroscopy and analyzed the size of the energy gap and Urbach energy. The results showed that cobalt doping (Co0.125Fe2.875O4) produced two indirect energy gap values ​​of 2.07 eV and 3.19 eV and one direct energy gap value of 3.63 eV. Urbach energy analysis revealed a very low Eu value of 0.0073 eV, indicating high crystal regularity and minimal structural defects in the material. This study demonstrated that cobalt doping not only increases the band gap energy of magnetite but also significantly lowers the Urbach energy, resulting in a material with more pronounced optical properties.
Pembimbingan Penyelesaian Soal Tes Pengetahuan Kuantitatif dan Tes Penalaran Matematika Bagi Siswa Kelas XII SMAN 2 Selong Lombok Timur Marzuki, Marzuki; Teguh Ardianto; Rahadi Wirawan; I Wayan Sudiarta; Ramadian Ridho Illahi; Gusti Ayu Niatri; Kormil Saputra
Jurnal Pengabdian Inovasi Masyarakat Indonesia Vol. 3 No. 2 (2024): Edisi Agustus
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpimi.v3i2.5914

Abstract

Melanjutkan studi ke perguruan tinggi merupakan impian banyak tamatan SMA sederajat. Untuk mewujudkannya, calon mahasiswa harus mempersiapkan diri dengan belajar dan bekerja keras, terutama bagi mereka yang tidak lolos jalur SNBP (Seleksi Nasional Berdasarkan Prestasi) dan harus menghadapi tes UTBK (Ujian Tulis Berbasis Komputer). Program pengabdian ini bertujuan memberikan pengalaman kepada siswa kelas XII tentang bentuk dan tingkat kesulitan tes masuk Perguruan Tinggi Negeri (PTN) serta cara penyelesaiannya. Pengalaman ini membantu siswa mengukur kesiapan mereka dalam menghadapi UTBK sekaligus memotivasi mereka meningkatkan waktu, kualitas, dan kuantitas belajar. Pelaksanaan program terdiri atas tiga tahapan: persiapan, pelaksanaan, dan evaluasi. Kegiatan utama meliputi: (1) review konsep matematika dasar, (2) ujicoba tes pengetahuan kuantitatif dan penalaran matematika, serta (3) pembimbingan soal ujicoba oleh tim. Hasil ujicoba menunjukkan kemampuan siswa dalam pengetahuan kuantitatif dan penalaran matematik masih rendah. Namun, pembimbingan terstruktur meningkatkan pemahaman siswa, menyadarkan mereka akan banyaknya materi yang perlu dipelajari, dan mendorong semangat belajar. Program ini juga membantu siswa lebih memahami jurusan yang diminati. Direkomendasikan kepada pihak sekolah untuk memberikan pembinaan intensif kepada seluruh siswa guna meningkatkan peluang lulus seleksi masuk PTN.
Tie-Dye Batik Training as a Medium for Creativity, Entrepreneurship, and Islamic Sciences Tramping for Students at Al-Intishor Islamic Boarding School Teguh Ardianto; Syamsuddin, Syamsuddin; Rahmatun Inayah; Kormil Saputra; Ika Umratul Asni Aminy; Indrawan Eka Badri; Nurmutyah Naylah; Nur Azzahra Al Radiyah; Nurjannah, Nurjannah; Fauziana Hidayat; Sofiana Aprilia
Media for Empowerment, Mobilization, and Innovation in Research & Community Vol. 1 No. 2 (2025): July-December
Publisher : Future Tecno-Science Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59535/1768hs15

Abstract

Batik is an Indonesian cultural heritage that embodies deep philosophical values and national identity. However, traditional batik-making techniques are often considered complex for beginners since they require specific skills. Therefore, the tie-dye technique, also known as batik ikat celup, is introduced as a simpler and more accessible alternative that can serve both as a learning medium and as an entrepreneurial opportunity. This community service program was conducted at Pondok Pesantren Al-Intishor, Mataram, involving 9th and 10th grade students. The method included delivering introductory materials, demonstrations, and hands-on practice in small groups under intensive guidance. The results revealed high enthusiasm among both students and teachers, who acknowledged the relevance of this activity to be integrated into craft and entrepreneurship education. Students successfully understood the stages of tie-dye batik making—from material preparation to the drying process—while also developing creativity through unique motifs and color variations. This program proved effective not only in enhancing knowledge about batik but also in fostering practical skills, self-confidence, and basic entrepreneurial potential. Thus, tie-dye batik training can be regarded as a strategic medium to preserve cultural heritage while simultaneously improving participants’ economic independence.  
UV-Vis Spectroscopic Analysis for Band Gap Determination of Cobalt-Doped Magnetite (Fe2.5Co0.5O4) Nanoparticles Derived from Natural Iron Sand Kurniawidi, Dian Wijaya; Saputra, Kormil; Ardianto, Teguh; Inayah, Rahmatun; Aminy, Ika Umratul Asni
KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Vol 10 No 2 (2025): KONSTAN (Jurnal Fisika dan Pendidikan Fisika)
Publisher : Universitas Islam Negeri (UIN) Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/konstan.v10i2.786

Abstract

Doping is an effective approach to altering the electronic and structural properties of a material, thereby influencing its optical and magnetic characteristics. This study successfully synthesized and characterized cobalt-doped magnetite (Fe2.5Co0.5O4) nanoparticles from natural iron sand using the coprecipitation method. The main objective was to evaluate the optical properties of the synthesized material through UV-Vis spectral analysis and to compare the band gap energy values using three approaches: the Tauc method (direct and indirect transitions), the Kubelka–Munk method, and the Urbach energy calculation as an indicator of structural disorder. The characterization results revealed that the incorporation of Co2+ ions into the magnetite structure induced significant changes in the absorption patterns, including the emergence of new absorption peaks and a redshift in wavelength. The obtained band gap values were 3.71 eV (Tauc-direct), 2.18 eV (Tauc-indirect), and 2.33 eV (Kubelka–Munk), confirming the presence of two types of optical transitions. Furthermore, the relatively low Urbach energy (0.07138 eV) indicated that the crystal structure remained well-preserved despite the modifications induced by doping. This study highlights the importance of employing multi-method approaches for reliable optical characterization and demonstrates that Fe2.5Co0.5O4 materials derived from local resources possess promising potential for photocatalytic and optoelectronic applications.
CO2 emissions in Indonesia: Key contributing factors and determinants Aminy, Ika UA.; Inayah, Rahmatun; Saputra, Kormil; Jayatri, Adella U.; Hidayati, Dian M.
Narra X Vol. 3 No. 3 (2025): December 2025
Publisher : Narra Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52225/narrax.v3i3.241

Abstract

Climate change is driven by increasing greenhouse gas emissions, particularly carbon dioxide (CO2). Developing countries such as Indonesia face a dilemma between meeting energy demands for development and reducing CO2 emissions. The aim of this study was to analyze trends of CO2 emissions in Indonesia during the period 1970–2023, utilizing secondary data from Our World in Data to obtain a comprehensive overview of national emission dynamics and Indonesia’s contribution at regional and global levels. A quantitative descriptive analysis method was applied using time-series data for the period 1970–2023, complemented by comparative analysis to evaluate temporal trends, dominant emission sources, and Indonesia’s proportional contribution at the Southeast Asia and global scales. The results indicate that Indonesia contributes approximately 3% of total global CO2 emissions and has the highest emission level in Southeast Asia, highlighting its strategic role in global climate change mitigation efforts. Historically, CO2 emissions in Indonesia showed a significant increase over the study period, rising from 3.37×108 tons in 1980 to 1.18×109 tons in 1984, largely due to economic growth from industrialization and increased energy consumption. The highest increase in CO2 occurred in 1997 due to forest fires and the El Niño phenomenon. Furthermore, the findings show that fossil fuel consumption, particularly coal, was the dominant contributor to national emissions in 2020. In conclusion, continued dependence on fossil energy remains a major challenge for Indonesia in achieving mitigation targets, underscoring the importance of energy transition and improved land-management strategies to curb future emission growth.
Electronic Properties of Fe3-xCoxO4 (x = 0.25 and 0.375) Synthesized from Natural Iron Sand: Evaluation of Band Gap and Urbach Tail Saputra, Kormil; Inayah, Rahmatun; Aminy, Ika Umratul Asni; Ardianto, Teguh; Kurniawidi, Dian W.
Jurnal Teras Fisika: Teori, Modeling, dan Aplikasi Fisika Vol 8 No 2 (2025): Jurnal Teras Fisika: Teori, Modeling, dan Aplikasi Fisika
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jtf.2025.8.2.17580

Abstract

Fe3-xCoxO4 nanoparticles (x = 0.25 and 0.375) were successfully synthesized using natural iron sand as the base material through a coprecipitation method with the addition of CoCl2·6H2O as a cobalt source. Optical characterization was carried out using UV–Vis spectroscopy in the wavelength range of 200–800 nm to analyze the electronic properties of the material. The measurement results showed that increasing the cobalt fraction strengthened the absorption in the visible region and shifted the absorption onset to lower energies, indicating a narrowing of the band gap energy. Tauc analysis revealed that the direct gap energy decreased from 2.271 eV (x = 0.25) to 2.221 eV (x = 0.375), while the indirect gap energy decreased from 2.222 eV to 2.204 eV. Furthermore, the Urbach energy calculation shows an increase from 0.073 eV at x = 0.25 to 0.074 eV at x = 0.375, indicating an increase in local disorder that broadens the band tail. This finding is consistent with previous research reports on Co-doped magnetite and CoFe2O4, and confirms that cobalt doping is effective in enhancing the visible light absorption capacity. Thus, Fe3-xCoxO4 based on natural iron sand, especially at x = 0.375, has potential applications as an active material in visible light-based photocatalysis and solar energy optoelectronic devices.
Effect of Polyol Synthesis Parameters on Particle Size and Crystal Size of ZnO: A Systematic Review Kormil Saputra; Rizka Ayu Fitri; Dian Wijaya Kurniawidi
MASALIQ Vol 6 No 4 (2026): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i4.10508

Abstract

Zinc oxide nanoparticles (ZnO NPs) are semiconductor oxide materials that have been widely developed because of their high chemical stability, relatively low synthesis cost, and broad potential applications in photocatalysis, sensors, pigments, catalysts, optical materials, and nanofluid systems. Particle size and crystallite size are critical parameters because they directly influence surface area, crystallinity, morphology, charge transfer, and the functional performance of ZnO. This study aims to examine the effects of synthesis parameters in the polyol method on the particle size and crystallite size of ZnO-based nanomaterials through a systematic literature review. Relevant literature published between 2021 and 2026 was collected from Scopus, ScienceDirect, and Google Scholar using Boolean search strategies. The selected articles were screened based on predetermined inclusion and exclusion criteria and analyzed using a descriptive-comparative approach. The review findings indicate that the polyol method influences the morphostructural characteristics of ZnO through several synthesis variables, including the type of polyol, precursor ratio, water content, base concentration, reaction temperature, reaction time, surfactants, stabilizers, and post-synthesis treatment. Ethylene glycol and diethylene glycol tend to support the formation of ZnO with smaller crystallite size and more controlled morphology, whereas prolonged reaction time and high-temperature calcination may increase crystal growth. In addition, doping and the use of surfactants can restrict crystal growth and reduce agglomeration. This review concludes that the polyol method is effective for controlling the particle size and crystallite size of ZnO; however, simultaneous optimization of synthesis parameters is required to obtain ZnO nanomaterials with morphostructural characteristics suitable for functional applications.
Pengaruh Parameter Green Sintesis TiO₂ Berbasis Metode Solvotermal terhadap Ukuran Partikel dan Ukuran Kristal: A Systematic Review Dian Wijaya Kurniawidi; Kormil Saputra; Nur Azzahra Al Radhiyah; Indrawan Eka Badri; Ika Umratul Asni Aminy
MASALIQ Vol 6 No 4 (2026): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i4.10523

Abstract

Titanium dioxide (TiO₂) is a semiconductor material widely used in photocatalysis, sensor, energy conversion, and environmental remediation applications because its performance is strongly influenced by structural characteristics, particularly particle size, crystal size, morphology, and crystal phase. This systematic review aims to analyze the influence of green synthesis parameters based on the solvothermal method on the particle size and crystal size of TiO₂. Articles were collected from the Scopus, ScienceDirect, and Google Scholar databases within the 2021–2025 publication range using combinations of Boolean keywords related to solvothermal synthesis, TiO₂, and green synthesis. Article selection was conducted based on inclusion and exclusion criteria emphasizing original research articles, the use of the solvothermal method, a green synthesis approach, and the availability of material characterization data. The review results showed that four articles met the inclusion criteria, with variations in TiO₂ particle size ranging from 25.41 to 100 nm and crystal size ranging from 0.96 to 31.9 nm. Parameters such as precursor type, solvent, green extract, solvothermal temperature, and processing time played important roles in regulating nucleation, crystal growth, surface stabilization, and particle agglomeration. The smallest particle size was obtained in the titanium isopropoxide–deionized water–banana peel system at 100 °C, whereas modified systems such as Ag-doped TiO₂ and TiO₂@g-C₃N₄ showed that application performance is determined not only by particle size but also by electronic engineering and interface structure. The conclusion of this review affirms that the optimization of green solvothermal synthesis of TiO₂ needs to be directed toward integrated control of particle size, crystal size, crystal phase, morphology, and application performance. The implications of this review contribute to the development of more targeted, efficient, and relevant green TiO₂ synthesis for sustainable functional material applications.
Co-Authors Adella Ulyandana Jayatri Aditya Yoga Purnama Agista, Wida Puteri Agness Claundya NT Ahmad Rifaldi Arahman Ahmad Taufiq Ahmad Zarkasi Ainiyah Fatin Alfina Taurida Alaydrus Alifni Aulia Aminy, Ika UA. Aminy, Ika Umratul Asni Amirin Kusmiran Anggun Almadani Anisa Anisa Apriani Apriani Arif Budianto Arif Hidayat Arin Artha Callista Ariyanthi, Gita Putri Ayu Mona Erisa Marpaung Baiq Adilya Putri Humaira Fatarani Baiq Laelatin Diniati Baiq Nabila Nasywa Baiq Revalina Restu Khaunifar Bakti Sukrisna Cahaya Rizkika Imanda Chanakan Sojayapan Chusna, Nadiya Miftachul Deatun Zahra Dewi Kgajar Fitriana Dian W. Kurniawidi Dian Wijaya Kurniawidi Dimas Mahendra Dionysius J. D. H. Santjojo Dwi Septia Kari Elen Renata Putra Fajariman, Ilham Dias Fatima Naimi Fauziana Hidayat Fina Nahdia Fitri Gina Fadilla Gusti Ayu Niatri Halia Safitri Handriani, Handriani Hendra Susanto Hidayati, Dian M. I Wayan Sudiarta Ika Umratul Asni Aminy Inayah, Rahmatun Indah Nur Gusfiana Indrawan Eka Badri Istiroyah Jayatri, Adella U. Kholis Nurhanafi Khuzaima, Nabila D. Kurniawan, Bakhrul Rizky Kurniawidi, Dian W. Kurniawidi, Dian Wijaya Laili Hidayati Laksono, Yoyok Adi Setio Luluk Tsaroya Zarkasyi Madani, Awanda OP. Maratus Soleha Markus Diantoro Marlina, Resti Marzuki Marzuki Masruroh Masruroh MASRUROH Melani Melani Mira Suhada Mislan Mohammad Asrul Muhammad Hardiansyah Muhammad Ihzan Muhammad Zuhdi Nabila Dwi Septia Nahdatul Wesi Najma Aldina Roshin Nandang Mufti Nela Ranita Amanda Nur Azzahra Al Radhiyah Nur Azzahra Al Radiyah Nurhasmi Wahyuni Nurjannah Nurjannah Nurmutyah Naylah Nurwijayanti Rahadi Wirawan Rahmatun Inayah Rahmawati Munir Ramadian Ridho Illahi Retna Apsari Rizka Ayu Fitri Saefullah, Lalu Sayida Magfirah Sembiring, Rinawati Shamim Mahabubul Haque Siti Azizah Sofiana Aprilia Suhayat Minardi Sunaryono Sunaryono Sunaryono, Sunaryono Susi Rahayu Syahrial A Syamsuddin Syamsuddin Teguh Ardianto, Teguh Thathit Suprayogi Umratun Hasanah Wahyu Lina Ramadani Wahyudin Wahyudin Wida Puteri Agista Wulandari, Nurul Putri Yuliana, Futri Yunan Amza Muhammad Yunitun Tamara Ziyadatun Adawiyah