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All Journal Jurnal Sains Materi Indonesia Physics Student Journal Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Indonesian Physical Review Journal of Dedication in Community (JoDiC)
Wafa Maftuhin
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Environmental Science Materials Science & Nanotechnology Physics Social Sciences Other

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Studi Sifat Elektronik Silicene dengan Pendekatan Teori Kerapatan Fungsional Maftuhin, Wafa; Pamungkas, Mauludi Ariesto
Physics Student Journal Vol 2, No 1 (2014)
Publisher : Department of Physics - Faculty of Science

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Abstract

Sifat elektronik dari Silikon dua dimensi berbentuk heksagonal yang disebut silicene telah diteliti dengan pendekatan teori kerapatan fungsional. Silicene diprediksi memiliki nilai konstanta kisi (lattice constant) sebesar 3,9 Angstrom, nilai ini mendekati hasil dari eksperimen. Silicene diprediksi memiliki sifat elektronik yang mirip dengan graphene. Pita energi silicene diprediksi tidak memiliki celah energi dan tidak saling tumpang tindih, banyaknya keadaan yang dominan adalah pada orbital p dan struktur membentuk ikatan kovalen.
EFEK DOPING ATOM ARSENIK PADA PITA ENERGI MATERIAL SILICENE BERDASARKAN PERHITUNGAN TEORI KERAPATAN FUNGSIONAL Mauludi Ariesto Pamungkas; Wafa Maftuhin
Jurnal Sains Materi Indonesia Vol 16, No 4: JULI 2015
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (819.953 KB) | DOI: 10.17146/jsmi.2015.16.4.4221

Abstract

 EFEK DOPING ATOM ARSENIK PADA PITA ENERGI MATERIAL SILICENE BERDASARKAN PERHITUNGAN TEORI KERAPATAN FUNGSIONAL. Menyusul sukses graphene dengan sifat-sifatnya yang super dan unik, material dua dimensi yang strukturnya serupa dengan graphene menjadi pusat perhatian para peneliti material. Silicene sebagai material yang memiliki struktur kristal sama dengan graphene namun terdiri dari atom-atom silicon menjadi material yang sangat penting mengingat dominasi silicon sebagai bahan utama komponen elekronika. Struktur pita dari silicene murni dan yang di doping dengan atom As diteliti dengan metode teori kerapatan fungsional (Density Functional Theory). Atom As disimulasikan pada beberapa posisi yang paling mungkin. Berdasarkan perhitungan energi pembentukan, posisi substitusi adalah posisi yang paling stabil dari atomAs pada silicene. Posisi atom As tepat di atas atom silkon jauh lebih stabil dari posisi di atas hexagonal (posisi hollow). Hasil perhitungan struktur pita menunjukkan bahwa silicene murni adalah semimetal sedangkan setelah di-doping dengan atom As berubah menjadi konduktor. Hasil ini berbeda dengan penambahan atom As pada graphene, di mana justru membuka band gap nya.
Third Generation Bioethanol Production from Chaetomorpha sp. isolated from Pulau Seribu Seawater using Acid Pretreatment Sepwin Nosten Sitompul; Wafa Maftuhin
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 37, No 3 (2020)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2020.37.3.1143

Abstract

Currently, the primary source of energy based on fossil fuel, thus promoting both the excessive use of fossil fuel and global warming. Bioethanol provides sustainable energy and serves to reduce the dependence on using fossil fuel. Third-generation bioethanol production from macroalgae provides alternative green energy. To observe the potency of biofuel resources of Chaetomorpha sp. isolated from Pulau Seribu Seawater, the effect of the acid pretreatment was evaluated by using two different acids (H2SO4) concentrations. Powdered Chaetomorpha sp. was prepared, followed by acid pretreatment using H2SO4 1% and 2% (v/v). After 72 hours of fermentation, 1% H2SO4 pretreatment produced 0.026 % of the ethanol from 3 grams of Chaetomorpha sp., whereas pretreatment with H2SO4 2% did not produce bioethanol.
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

Abstract

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
TWISTED INTRAMOLECULAR CHARGE TRANSFER IN STYRYLPENTAFLUOROPHENYL AMINOPYRENE: A DFT AND TDDFT STUDY OF SOLVENT EFFECTS AND MOLECULAR TWISTING DYNAMICS Maftuhin, Wafa; Walter, Michael
Indonesian Physical Review Vol. 9 No. 1 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i1.543

Abstract

Twisted intramolecular charge transfer is a key feature of donor–acceptor chromophores, significantly influencing their photophysical behavior. These processes are also central to the design of sensing and optoelectronic materials. In this study, we examine styrylpentafluorophenyl aminopyrene, which links a rigid pentafluorostyryl acceptor to a flexible N, N-dimethylaniline donor. Using density functional theory (DFT) and time-dependent DFT, we optimized ground and excited-state structures, mapped torsional energy surfaces, and explored solvent effects within a dielectric continuum model. The calculations indicate that the pentafluorostyryl unit remains locked in conjugation, while donor twisting through the dimethylaniline group drives the formation of a twisted intramolecular charge transfer (TICT) state. This mechanism reproduces observed solvent-independent absorption and solvent-sensitive fluorescence shifts of about 0.5 eV in polar media. The results place styrylpentafluorophenyl aminopyrene among donor-controlled twisted intramolecular charge transfer systems, while also highlighting how the structural asymmetry of a rigid acceptor and a flexible donor creates a single relaxation pathway. Such design principles can help guide the tuning of charge-transfer emission in functional dyes and related optoelectronic applications. In contrast to previously studied systems, styrylpentafluorophenyl aminopyrene reveals a distinctly donor-controlled mechanism reinforced by a rigid acceptor, establishing a new theoretical basis for predicting twisted intramolecular charge transfer behavior in asymmetric donor–acceptor chromophores.
Co-Authors Aini, Adawiyyah Nuurul Aini Evi Suaebah Fitriana Frida Ulfa Ernawati Lydia Rohmawati Mauludi Ariesto Pamungkas Munasir Sepwin Nosten Sitompul Walter, Michael ZAINUL ARIFIN IMAM SUPARDI