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All Journal Jurnal Layanan Masyarakat (Journal of Public Service) Molekul: Jurnal Ilmiah Kimia
Mulya, Fadjar
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Humanities Biochemistry, Genetics & Molecular Biology Chemistry Decision Sciences, Operations Research & Management Environmental Science Materials Science & Nanotechnology Social Sciences Other

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Band Gap Energy of Some Kekuléan Polycyclic Aromatic Hydrocarbon as Finite-Size Graphene: A DFT Study Aziz, Hafiz Aji; Mulya, Fadjar; Kuamit, Thanawit; Pranowo, Harno Dwi
Molekul Vol 20 No 3 (2025)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2025.20.3.14461

Abstract

Abstract. The effect of size and shapes of some Kekuléan Polycyclic Aromatic Hydrocarbon (PAH) were studied using the density functional theory with B3LYP hybrid function and LANL2DZ basis set using Gaussian09 software program. Four different geometries of PAH: Linear (L), Hexagonal (H), Zigzag (Z) and Rhombus (R) were evaluated. The results showed that band gap energy (Eg) tends to decrease as the size of the increase, but some geometry decrease faster. Simple analysis also showed that |log(N)| = o(Eg(N)) for L, H and R geometries, indicating that Eg will become 0 for a finite size. These trends indicate that PAH size and shape can be tuned to modulate electronic properties and redox behavior, offering routes to optimize PAH-based anodes for LIBs. In terms of industrial relevance, the ability to tailor Eg​ through geometry provides design guidelines to achieve higher energy density, faster charging, and improved cycling stability, while potentially enabling scalable and cost-effective synthesis and processing of carbon-based organic electrode materials. The findings support the development of PAH-based anodes as a viable pathway to enhance performance and manufacturability in lithium-ion battery technology. Keywords: Density functional theory, electronic structure, energy materials, polycyclic aromatic hydrocarbons, shape effect, size effect
THE USE OF SCREEN PRINTED ELECTRODE-BASED NANOSENSOR TO DETECT DRUGS IN BBPOM DENPASAR, BALI Amrillah, Tahta; Saputra, Mirza Ardella; Jiwanti, Prastika Krisma; Amalina, Ilma; Susilo, Raden Joko Kuncoroningrat; Hayaza, Suhailah; Mulya, Fadjar; Firmansyah, Mochamad Lutfi; Sari, Retno
Jurnal Layanan Masyarakat (Journal of Public Services) Vol. 9 No. 4 (2025): JURNAL LAYANAN MASYARAKAT
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/.v9i4.2025.667-675

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Nanotechnology sensor is one of technology that could support biomedicine developments, including in the pharmaceutical field. Highly sensitive sensor having ability to detect various pharmaceutical substances as well as components in the food have have been developed, including the so-called nanosensor based screen printed electrode, using nanomaterial boron doped diamond (BDD). This nanosensor could replace conventional sensing technology that is considered still have several drawbacks such as inefficient routes and time consuming, as well as high cost. A nanosensor-based screen printed electrode was developed and implemented for detection of pharmaceutical substances, including drugs. In this opportunity, this community service program disseminated nanosensor technology to pharmacists and food and drug assessors at BBPOM Denpasar, Bali. The program is conducted via short course and practical case on how to use the nanosensor that already developed in the laboratory. The community service program is started with pretest about sensor and nanotechnology, followed by course, practical case, and lastly, the post-test. The post-test results showed a highly positive response, with 71% of participants reporting very high interest, 66% expressing very high satisfaction, and the majority indicating that the activity was relevant, beneficial, and worth recommending. These community service activities are expected to facilitate the broader implementation of nanosensor technology in drug and food assessments. Hopefully, this technology could be spreadly used by the the pharmacies and stake holders who have the right for doing drug and food assessements, not only in Denpasar but also in other cities in Indonesia.
Co-Authors Aziz, Hafiz Aji Firmansyah, Mochamad Lutfi Harno Dwi Pranowo Ilma Amalina Kuamit, Thanawit Mirza Ardella Saputra Prastika Krisma Jiwanti Raden Joko Kuncoroningrat Susilo Retno Sari Suhailah Hayaza Tahta Amrillah