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All Journal Jurnal Sains Materi Indonesia JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI EduChemia: Jurnal Kimia dan Pendidikan Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Journal of Teaching and Learning Physics Akta Kimia Indonesia JURNAL EKSAKTA PENDIDIKAN (JEP) KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Jurnal Pendidikan Fisika dan Teknologi Pascal: Journal of Physics and Science Learning DIFFRACTION: Journal for Physics Education and Applied Physics Indonesia Natural Research Pharmaceutical Journal (INRPJ) Optika : Jurnal Pendidikan Fisika Jurnal Pendidikan Fisika dan Sains (JPFS) Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Jurnal Pembelajaran Fisika Natural Science Education Research (NSER) Charm Sains : Jurnal Pendidikan Fisika Lontar Physics Today SEGARA : Jurnal Pengabdian Kepada Masyarakat SEARCH: Science Education Research
Rahmat Firman Septiyanto, Rahmat Firman
Jurusan Pendidikan Fisika FKIP UNTIRTA
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

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APPLICATION OF CARBON DOTS FROM PAPAYA PEEL USING THE OVEN HEATING METHOD ON SPINACH PLANT GROWTH Bunga Kusuma Putri; Rahmat Firman Septiyanto; Devi Ayu Nur'aini
Pascal: Journal of Physics and Science Learning Vol 10, No 1 (2026): JUNI
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/pascal.v10i1.13665

Abstract

This study aims to synthesize carbon dots (C-dots) from papaya peel using the oven heating method and to examine their effect on spinach growth. The synthesis process involved carbonization, grinding, dissolution, and filtration to obtain a clear C-dots solution. UV light testing showed fluorescence emission, indicating the formation of carbon nanoparticles. C-dots were applied at concentrations of 0.5 g/L and 1 g/L, with distilled water as the control. Plant growth was observed through plant height for seven days. The results showed that C-dots improved plant growth compared to the control. The 1 g/L concentration was more effective in the early phase, while 0.5 g/L showed more stable effects in the later phase. These findings indicate the potential of C-dots as an environmentally friendly nanotechnology-based plant growth enhancer. Further research is recommended to explore other concentrations and growth parameters.
Crystal Structure and Lattice Strain Analysis of Pure and Fe3+-Doped TiO2 Nanoparticles with Varied Dopant Concentrations Based on the Sol-Gel Method Anisatur Rofiah; Yus Rama Denny; Rahmat Firman Septiyanto
SEARCH: Science Education Research Journal Vol. 4 No. 2 (2026): SEARCH: April 2026
Publisher : IAIN Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47945/search.v4i2.2968

Abstract

Penelitian ini mengkaji modifikasi struktur mikro nanopartikel TiO2 melalui doping besi Fe3+ dengan variasi konsentrasi (0%, 0,25%, 0,5% dan 1%) menggunakan metode sol-gel. Sampel hasil kalsinasi suhu 450 dianalisis menggunakan X-ray diffraction (XRD). Hasil pengujian menunjukkan seluruh sampel berhasil mempertahankan fase tunggal tetragonal anatase tanpa adanya endapan fase sekunder besi oksida. Penambahan dopan memicu pelebaran nilai FWHM dan pergeseran bertahap pada puncak utama (2 = 25,3) Berdasarkan perhitungan persamaan Scherrer, ukuran kristalit menyusut secara konsisten dari 25,68 nm ke 16,61 nm seiring bertambahnya kadar besi. Sebaliknya, nilai regangan kisi (lattice strain) mengalami kenaikan linear akibat akumulasi distorsi lokal dalam kisi TiO2 dapat disimpulkan bahwa substitusi ion Fe3+ secara efektif mampu menahan pertumbuhan butir dan merekayasa struktur internal material, yang sangat potensial untuk aplikasi fotokatalis maupun sel surya
Development of a Sound Wave E-module to Enhance Grade XI Students’ Critical Thinking Skills: An ADDIE-Based Development Study at SMAN 1 Padarincang Maya Maelani; Rudi Haryadi; Rahmat Firman Septiyanto
SEARCH: Science Education Research Journal Vol. 4 No. 2 (2026): SEARCH: April 2026
Publisher : IAIN Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47945/search.v4i2.2973

Abstract

The development of technology in the digital era requires education to design learning resources that support 21st-century skills, including critical thinking. Critical thinking is important in physics learning because students must interpret phenomena, analyze relationships among variables, evaluate evidence, and draw scientific conclusions rather than merely memorize formulas. Sound wave material is often considered difficult by students because several concepts are abstract and are not sufficiently supported by interactive teaching materials. This study aimed to develop a sound wave e-module, determine its feasibility, examine student responses, and identify its potential to improve the critical thinking skills of Grade XI students at SMAN 1 Padarincang. This research used a Research and Development (R&D) approach with the ADDIE model, limited to four stages: Analysis, Design, Development, and Implementation. The results showed that the e-module achieved a very feasible category based on media expert validation, with percentages of 98%, and material expert validation, with percentages of 93,33%. Student responses were in the very good category, with an average percentage of 86.98%. The mean score increased from 19.31 in the pretest to 26.00 in the posttest, with an N-gain of 0.32, which is categorized as moderate. These findings indicate that the developed sound wave e-module is feasible, practical, and has the potential to support students’ critical thinking skills in physics learning.  
PERBANDINGAN PENGARUH CARBON DOTS DARI KULIT PARE DAN JAGUNG PADA PERTUMBUHAN BAYAM Khafilah Hendra Yani; Nelly Apriliani; Rahmat Firman Septiyanto; Tresna Galih Sukma Suryana; Jesica Amelda; Tatmimatul Hasanah; Dede Ardila
OPTIKA: Jurnal Pendidikan Fisika Vol. 10 No. 1 (2026): OPTIKA: Jurnal Pendidikan Fisika
Publisher : Department of Physics Education, Faculty of Teacher Training and Education, Universitas Flores

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37478/optika.v10i1.7994

Abstract

Penelitian ini bertujuan membandingkan pengaruh carbon dots (C-dots) dari kulit pare dan kulit jagung terhadap pertumbuhan tanaman bayam (Amaranthus sp.) pada konsentrasi 0,5 g/L dan 1 g/L. C-dots disintesis menggunakan metode pemanasan oven pada suhu 250°C selama 40 menit, kemudian diaplikasikan dengan penyiraman selama 7 hari. Parameter pertumbuhan yang diamati adalah tinggi tanaman. Hasil menunjukkan bahwa kedua jenis C-dots meningkatkan pertumbuhan bayam dibandingkan kontrol (aquades). Perlakuan C-dots kulit jagung 0,5 g/L menghasilkan pertumbuhan tertinggi (2,0 cm pada hari ke-7), diikuti oleh C-dots kulit pare 1 g/L (1,9 cm) dan kulit jagung 1 g/L (1,9 cm). Pengaruh C-dots bersifat tergantung dosis (dose-dependent), di mana konsentrasi optimal bergantung pada sumber biomassa. Kesimpulannya, C-dots dari kulit pare dan jagung berpotensi sebagai biostimulan ramah lingkungan, dengan kulit jagung 0,5 g/L sebagai perlakuan terbaik dalam penelitian ini.
Pengembangan Media Animation Series Terintegrasi Education for Sustainable Development Untuk Memfasilitasi Visualization Learning Pada Materi Energi Terbarukan Agni Yusifa; Asep Saefullah; Rahmat Firman Septiyanto
Jurnal Pendidikan Fisika dan Sains (JPFS) Vol 7 No 2 (2024): September
Publisher : Pendidikan Fisika, FKIP, Universitas Nahdlatul Ulama Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52188/jpfs.v7i2.754

Abstract

This research was conducted against the backdrop of the emergence of problems in the use of fossil energy which caused Indonesia to have an energy crisis. Education is one of the efforts to prevent the energy crisis. Therefore, research on the development of teaching media integrated with Education for Sustainable Development (ESD) was conducted. The purpose of this study was to determine the results of material and media validation and students' responses to the acceptance of teaching media. This research has developed ESD integrated animated video teaching media to facilitate visualisation learning on renewable energy material. This research method uses R&D with Thiagarajan's modified 4-D research model with stages namely define, design and development. This research. The results of material expert validation obtained a percentage of 83.7% which was categorised as very feasible and media validation obtained a percentage of 85.4%. Student response to teaching media obtained a percentage of 87.7% which is categorised as very good.
Pengaruh Carbon Dots Dari Kulit Kentang Dengan Teknik Iradiasi Gelombang Mikro Terhadap Pertumbuhan Tanaman Cabai Selvi Kurnia; Rahmat Firman Septiyanto; Yus Rama Denny M; Isriyanti Affifah
Jurnal Pendidikan Fisika dan Sains (JPFS) Vol 8 No 1 (2025): Maret
Publisher : Pendidikan Fisika, FKIP, Universitas Nahdlatul Ulama Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52188/jpfs.v8i1.1111

Abstract

Carbon Dots (C-dots) are carbon-based nanomaterials that have fluorescent properties, are environmentally friendly, and are easily synthesized from organic waste materials. This research aims to synthesize C-dots from potato skins using the microwave irradiation method as an environmentally friendly and economical alternative to increase the growth of chili plants. Application tests on chili plants were carried out by adding C-dots solution to the growing medium in various concentrations (control, 50 mg/L, 60 mg/L, and 70 mg/L). Observation results showed that chili plants watered with C-Dots showed optimum growth rates found to occur with 50 mg/L carbon dots, compared to the control study, which shows a balance between growth stimulation and effective nutrient absorption without causing toxicity effects on the plants. Then, the resulting C-Dots samples were characterized using a UV-Vis Spectrophotometer using a wavelength range of 200-800 nm. The results of measurements with a UV-Vis spectrophotometer showed absorption at a wavelength of 251 nm and showed an absorbance peak of 4.379.
APPLICATION OF CARBON DOTS FROM PAPAYA PEEL USING THE OVEN HEATING METHOD ON SPINACH PLANT GROWTH Bunga Kusuma Putri; Rahmat Firman Septiyanto; Devi Ayu Nur'aini
Pascal: Journal of Physics and Science Learning Vol 10, No 1 (2026): JUNI
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/pascal.v10i1.13665

Abstract

This study aims to synthesize carbon dots (C-dots) from papaya peel using the oven heating method and to examine their effect on spinach growth. The synthesis process involved carbonization, grinding, dissolution, and filtration to obtain a clear C-dots solution. UV light testing showed fluorescence emission, indicating the formation of carbon nanoparticles. C-dots were applied at concentrations of 0.5 g/L and 1 g/L, with distilled water as the control. Plant growth was observed through plant height for seven days. The results showed that C-dots improved plant growth compared to the control. The 1 g/L concentration was more effective in the early phase, while 0.5 g/L showed more stable effects in the later phase. These findings indicate the potential of C-dots as an environmentally friendly nanotechnology-based plant growth enhancer. Further research is recommended to explore other concentrations and growth parameters.
Co-Authors Agni Yusifa Akbar Hanif Dawam Akbar Hanif Dawam Abdullah Akbar Hanif Dawam Abdullah Akbar Hanif Dawam Abdullah Akbar Hanif Dawam Abdullah Alfarouqy, Ahmad Haekal Amalia, Rizkika Anang Suryana Andri Suherman Andri Suherman Anisatur Rofiah Asep Saefullah Asep Saefullah Asep Saefullah Atifah Alya Ramadhina Agustin Atika Diah Isnaeni Putri Ayu, Widya Purbo Kusumaning Azmar, Azmar Bunbun Bundjali Bunga Kusuma Putri Dede Ardila Devi Ayu Nur'aini Dina Rahmi Darman Dinda Aulia Oktaviana Fatah Sulaiman Fauziah, Siti Sepiyanti Fida Madayanti Warganegara Fida Madayanti Warganegara Firmanul Catur Wibowo Fitri, Amelia Febriana Guntara, Yudi Guntara, Yudi Firman Hanif Akbar Dawam Abdullah Indri Sari Utami Irah Namirah Isriyanti Affifah, Isriyanti Jesica Amelda Junitasari, Junitasari Khafilah Hendra Yani Masitoh Mangsur Maya Maelani Mukhtar, Yus Rama Denny Mustaqim, Ilham Namirag, Irah Nelly Apriliani Nisa Sa'diah Novita Aulia Safitri Prayoga, Adam Fori PUTRI HANDAYANI Qothrunnada, Qothrunnada Rahmat Awaludin Salam Rifdah Hanifah Rudi Haryadi Selvi Kurnia Sinda Intandiana Siti Nala Farihah Syamsul Hidayat Syamsul Hidayat Tatmimatul Hasanah Tresna Galih Sukma Suryana Utami, Indri Sari Utami, Indri Sari Widyawati, Dian Yayat Ruhiat Yudi Guntara Yus Rama Denny Yus Rama Denny Yuvita Oktarisa, Yuvita