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Empowering High School Students in Nganjuk Through Scientific Writing Training: A Community Engagement Initiative Frida Ulfa Ernawati; Lydia Rohmawati; Munasir; Zainul Arifin Imam Supardi; Evi Suaebah; Maftuhin, Wafa; Aini, Adawiyyah Nuurul Aini; Fitriana
Journal of Dedication in Community Vol. 3 No. 1 (2025)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences (FMIPA) Universitas Negeri Surabaya (UNESA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jodic.v3n1.p14-19

This community service activity was specifically aimed at high school students in Nganjuk, who generally need to improve their knowledge and skills in writing scientific articles. The objectives of this activity are to (1) provide knowledge and understanding of the methods for writing scientific works, particularly national journal articles, and (2) assist students in producing scientific papers. The training began with explanations accompanied by examples (including titles, background, methods, results, discussions, conclusions, implications, and references). Participants were then assigned writing exercises on topics of their interest to work on at home. After five days, they reconvened to present their written results. In general, the training resulted in improved knowledge and skills, as participants demonstrated increased understanding and ability in writing scientific papers compared to before the training. This improvement was reflected in the rise in average scores and the outcomes of interviews conducted after the training process. Keywords: Student, Scientific Paper, Training, Writing

REVIEW : SINTESIS NANOPARTIKEL SILIKA DARI BEBERAPA MATERIAL DENGAN METODE SOL-GEL: Kata Kunci: Silika, Karakterisasi, Metode Sol-Gel Elvita Eka Nursari; Widya Ningrum; Ersyzario Edo Yunata; Evi Suaebah; Rohim Amirullah Firdaus
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p115-123

Silika (SiO₂) adalah senyawa anorganik dengan struktur tiga dimensi yang memiliki beberapa sifat diantaranya luas permukaan besar, porositas tinggi, dan stabilitas termal yang baik. Material silika memiliki aplikasi luas dalam berbagai bidang industri, termasuk katalis, bahan elektronik, dan biosensor. Untuk memperoleh silika menggunakan metode yang efisien, seperti metode sol-gel telah diidentifikasi sebagai teknik yang efektif untuk sintesis nanopartikel silika dengan kualitas tinggi, memungkinkan penggunaan material alami seperti lumpur Lapindo, abu vulkanik, dan pasir pantai. Metode sol-gel memiliki keunggulan dalam kemurnian dan homogenitas produk yang dihasilkan. Proses sintesis melibatkan tahapan hidrolisis, kondensasi, dan polimerisasi untuk membentuk gel silika, yang kemudian dikeringkan dan dikarakterisasi. Hasil karakterisasi menggunakan X-Ray Fluorescence (XRF) menunjukkan peningkatan kadar SiO₂ yang signifikan setelah proses ekstraksi. Misalnya, kadar silika dalam pasir pantai Bajul Mati meningkat dari 31,0% menjadi 93,9%, sementara kadar SiO₂ dalam lumpur Lapindo meningkat dari 50,00% menjadi 77,71%. Selain itu, analisis X-Ray Diffraction (XRD) menunjukkan pola difraksi khas amorf dengan puncak difraksi pada sudut 2θ = 22°, mengindikasikan keberhasilan sintesis nanopartikel silika. Karakterisasi menggunakan Scanning Electron Microscope (SEM) menunjukkan bahwa nanopartikel yang dihasilkan memiliki ukuran sekitar 50 nm, dengan kemungkinan aglomerasi hingga ~1 μm. Hasil dari penelitian ini menunjukkan bahwa metode sol-gel efektif dalam mengekstraksi silika dari sumber alam dengan tingkat kemurnian yang tinggi, menjadikannya alternatif yang berpotensi untuk produksi silika dalam skala industri. Kata Kunci: Silika, Karakterisasi, Metode Sol-Gel Abstract Silica (SiO₂) is an inorganic compound with a three-dimensional structure that has several properties including large surface area, high porosity, and good thermal stability. Silica materials have wide applications in various industrial fields, including catalysts, electronic materials, and biosensors. To obtain silica using efficient methods, such as the sol-gel method has been identified as an effective technique for the synthesis of silica nanoparticles with high quality, allowing the use of natural materials such as Lapindo mud, volcanic ash, and beach sand. The sol-gel method offers advantages in the purity and homogeneity of the resulting product. The synthesis process involves the stages of hydrolysis, condensation, and polymerisation to form silica gel, which is then dried and characterised. Characterisation results using X-Ray Fluorescence (XRF) showed a significant increase in SiO₂ content after the extraction process. For example, the silica content in Bajul Mati beach sand increased from 31.0% to 93.9%, while the SiO₂ content in Lapindo mud increased from 50.00% to 77.71%. In addition, X-Ray Diffraction (XRD) analysis showed a typical amorphous diffraction pattern with a diffraction peak at an angle of 2θ = 22°, indicating the successful synthesis of silica nanoparticles. Characterisation using a Scanning Electron Microscope (SEM) revealed that the resulting nanoparticles were approximately 50 nm in size, with possible agglomeration up to ~1 μm. The results from this study show that the sol-gel method is effective in extracting silica from natural sources with a high degree of purity, making it a potential alternative for silica production on an industrial scale. Keywords: Silica, Characterisation, Sol-Gel Method

SINTESIS DAN KARAKTERISASI GRAPHENE OXIDE (GO) YANG DIMODIFIKASI DENGAN NANOPARTIKEL SILIKA BERBASIS LIMBAH CANGKANG SAWIT Paramundhita, Frizky Audis; Munasir; Evi Suaebah
Inovasi Fisika Indonesia Vol. 14 No. 3 (2025): Vol 14 No 3
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n3.p369-376

Abstrak Penelitian ini dilakukan dengan tujuan untuk menghasilkan dan mengkaji karakteristik nanokomposit graphene oxide (GO) yang telah dimodifikasi dengan nanopartikel silika (SiO₂), menggunakan limbah cangkang kelapa sawit sebagai sumber karbon. Tahapan awal meliputi pembuatan karbon aktif melalui proses aktivasi kimia menggunakan larutan NaOH, kemudian dilanjutkan dengan sintesis GO melalui metode Hummers yang telah dimodifikasi, serta sintesis komposit GO–SiO₂ dengan memanfaatkan prekursor TEOS (Tetraethyl Orthosilicate). Karakterisasi struktur material menggunakan X-Ray Diffraction (XRD) dan Fourier Transform Infrared Spectroscopy (FTIR). Berdasarkan hasil uji karakterisaasi, data XRD menunjukkan pergeseran sudut difraksi dari 2θ = 24,2° pada GO menjadi 23,8° pada GO-SiO₂, yang mengindikasikan peningkatan jarak antar bidang kristal dari 3,67 Å menjadi 3,73 Å, disertai dengan penurunan ukuran kristalit dari 3,7 nm menjadi 3,5 nm. Spektrum FTIR menunjukkan kehadiran gugus O–H, C=O, dan Si–O–Si, menguatkan terbentuknya struktur komposit. Analisis SEM memperlihatkan adanya nanopartikel silika yang menempel pada permukaan GO, sementara hasil EDX mengonfirmasi keberadaan unsur silikon sebesar 3,6% pada komposit GO–SiO₂, disertai peningkatan oksigen dan penurunan karbon yang menunjukkan keberhasilan proses modifikasi. Secara keseluruhan, hasil ini mengindikasikan bahwa limbah cangkang kelapa sawit memiliki prospek sebagai sumber material karbon yang berkelanjutan untuk pengembangan komposit GO–SiO₂ yang fungsional dan ramah lingkungan. Abstract This study aims to produce and evaluate the characteristics of graphene oxide (GO) nanocomposites modified with silica nanoparticles (SiO₂) by utilizing palm shell waste as a carbon source. The initial stage includes the production of activated carbon through a chemical activation process using NaOH solution. Then continued with the synthesis of GO through the modified Hummers method, and the synthesis of GO–SiO₂ composites using Tetraethyl Orthosilicate (TEOS) as a precursor. Characterization of the material structure was carried out using X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). XRD analysis showed a shift in the diffraction angle from 2θ = 24.2° for GO to 23.8° for GO-SiO₂, which indicated an increase in the interlayer distance from 3.67 Å to 3.73 Å, accompanied by a decrease in the crystallite size from 3.7 nm to 3.5 nm. The FTIR spectrum shows the presence of O–H, C=O, and Si–O–Si groups, strengthening the formation of the composite structure. SEM analysis shows the presence of silica nanoparticles attached to the GO surface, while EDX results confirm the presence of silicon elements of 3.6% in the GO–SiO₂ composite, accompanied by an increase in oxygen and a decrease in carbon indicating the success of the modification process. Overall, these results indicate that palm kernel shell waste has the prospect of being a sustainable source of carbon material for the development of functional and environmentally friendly GO–SiO₂ composites.

STUDI PERBANDINGAN BAJA-LAS TIPE G300 DAN G550 DENGAN MENGGUNAKAN OPTICAL EMISSION SPECTROSCOPY (OES) DAN IMPLIKASI TERHADAP SIFAT FISIS Sya'diyah, Ainur Rofiatus; Evi Suaebah; Nugrahani Primary Putri; Fany Aditama
Inovasi Fisika Indonesia Vol. 15 No. 2 (2026): Vol 15 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v15n2.p199-205

Abstrak Penelitian ini membandingkan komposisi kimia baja lapis aluminium seng (BjLAS) tipe G300 dan G550 menggunakan Optical Emission Spectroscopy (OES) serta menelaah kaitannya dengan perbedaan kuat tarik berdasarkan data uji tarik. Sebanyak delapan sampel, masing-masing empat untuk G300 dan empat untuk G550, dianalisis terhadap unsur karbon (C), mangan (Mn), fosfor (P), dan sulfur (S). Hasil pengukuran menunjukkan bahwa G300 memiliki rata-rata kadar C 0,0745% dan Mn 0,1562%, sedangkan G550 memiliki kadar C 0,0607% dan Mn 0,1340%. Untuk unsur pengotor, kadar P dan S pada kedua tipe masih berada di bawah batas standar yang dirujuk, dengan P sebesar 0,0213% dan 0,0158%, serta S sebesar 0,0113% dan 0,0163% untuk masing-masing G300 dan G550. Meskipun G300 memiliki kadar C dan Mn sedikit lebih tinggi, G550 menunjukkan kuat tarik rata-rata lebih besar, yaitu 694,25 MPa dibandingkan 404,25 MPa pada G300. Temuan ini menunjukkan bahwa perbedaan komposisi kimia saja belum cukup menjelaskan perbedaan sifat mekanik, karena riwayat termomekanik selama proses produksi diduga turut berperan. Metode OES terbukti efektif dan akurat dalam menganalisis komposisi unsur dengan ketelitian tinggi, yang menjadi dasar untuk kontrol kualitas dan pemilihan material dalam industri. Abstract This study compares the chemical composition of aluminum-zinc coated steel (BjLAS/AZCS) types G300 and G550 using Optical Emission Spectroscopy (OES) and examines its relation to differences in tensile strength using supporting tensile data. Eight samples, consisting of four G300 and four G550 specimens, were analyzed for carbon (C), manganese (Mn), phosphorus (P), and sulfur (S). The results show that G300 has average C and Mn contents of 0.0745% and 0.1562%, respectively, while G550 has 0.0607% C and 0.1340% Mn. The P and S contents of both grades remain below the cited standard limits, with P contents of 0.0213% and 0.0158% and S contents of 0.0113% and 0.0163% for G300 and G550, respectively. Although G300 contains slightly higher C and Mn, G550 exhibits a much higher average tensile strength, 694.25 MPa compared with 404.25 MPa for G300. These findings indicate that chemical composition alone is insufficient to explain the mechanical-property difference; the thermomechanical history during production is likely influential. The OES method has demonstrated efficacy and precision in analyzing elemental composition, providing a foundation for quality control and material selection in industry.

POLIANILIN SEBAGAI SENSOR pH TINJAUAN LITERATUR SISTEMATIS DAN ANALISIS BIBLIOMETRIK Ayu, Alfazahra Ayu Maulidyah; Alifatul Azkia Bakhrin; Dinda Hana Murty Wardah; Evi Suaebah; Nugrahani Primary Putri
Inovasi Fisika Indonesia Vol. 15 No. 2 (2026): Vol 15 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v15n2.p166-181

Abstrak Polianilin (PANI) merupakan salah satu polimer konduktif yang banyak diteliti sebagai material sensor pH karena sifat konduktivitasnya yang bergantung pada jumlah ion hidrogen (H⁺) di lingkungannya. Meskipun aplikasinya terus berkembang dalam bidang lingkungan, biomedis, dan teknologi fleksibel, belum ada kajian bibliometrik komprehensif yang memetakan arah dan relevansi ilmiahnya secara global. Penelitian ini bertujuan untuk menjawab: (1) bagaimana tren jumlah sitasi dari penelitian terkait sensor pH berbasis polianilin dan artikel mana yang paling berpengaruh dalam bidang tersebut, (2) apakah studi Polyaniline (PANI) sebagai sensor pH tetap menjadi topik yang relevan untuk penelitian akademis di masa depan, serta (3) bagaimana upaya penelitian saat ini didistribusikan mengenai sensor pH berbasis Polianilin dalam hal jejaring kolaborasi penulis dan peta topik penelitian berdasarkan kata kunci. Analisis dilakukan menggunakan basis data Dimensions dengan pendekatan Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) dan pemetaan visual melalui VOSviewer. Hasil menunjukkan peningkatan signifikan penelitian sensor pH berbasis PANI pada periode 2016–2019, diikuti fluktuasi hingga 2025. Meski publikasi menurun setelah 2019, tren sitasi terus meningkat, menandakan keberlanjutan relevansi akademis topik ini. Pemetaan kolaborasi mengidentifikasi klaster riset utama di Asia dan Eropa dengan pergeseran fokus dari sensor optik menuju integrasi nanokomposit dan sistem berbasis IoT. Temuan ini menegaskan meskipun laju publikasi menurun, topik ini tetap memiliki posisi strategis dalam riset material fungsional. Pengembangan masa depan berpotensi difokuskan pada peningkatan sensitivitas, stabilitas jangka panjang, integrasi dengan teknologi nirkabel dan perangkat pintar untuk mendukung sistem pemantauan lingkungan dan biomedis berkelanjutan. Abstract Polyaniline (PANI) is one of the most widely studied conducting polymer for pH sensing applications due to its conductivity, which depends on the concentration of hydrogen ions (H⁺) in its environment. Although its applications continue to expand in environmental monitoring, biomedical systems, and flexible technologies, no comprehensive bibliometric study has yet mapped its global scientific relevance and research trajectory. This study aims to address: (1) how citation trends of studies on polyaniline-based pH sensors have evolved and which articles have been the most influential in the field, (2) whether research on Polyaniline (PANI) as a pH sensor remains a relevant topic for future academic investigation, and (3) how current research efforts on PANI-based pH sensors are distributed in terms of author collaboration networks and keyword-based topic mapping. The analysis was conducted using the Dimensions database, applying the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) approach and visual mapping through VOSviewer. Results reveal a significant increase in PANI-based pH sensor research during 2016–2019, followed by fluctuations up to 2025. Although publication output declined after 2019, citation trends continued to rise, indicating the sustained academic relevance of this topic. Collaboration network mapping identified major research clusters in Asia and Europe, with thematic shifts from optical sensors toward nanocomposite integration and IoT-based systems. These findings confirm that despite the decline in publication rate, this topic remains strategically positioned within functional material research. Future directions are expected to focus on improving sensitivity, long-term stability, and integration with wireless and smart technologies to support sustainable environmental and biomedical monitoring systems.

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