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All Journal Jurnal Sains Materi Indonesia INDONESIAN JOURNAL OF APPLIED PHYSICS
Pramudito, Sidikrubadi
Departemen Fisika, FMIPA - IPB Kampus IPB Darmaga, Bogor
Astronomy Energy Materials Science & Nanotechnology Physics

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Perhitungan Energi Disosiasi Gugus Fungsi OH- dan PO43- Hidroksiapatit dengan Pemodelan Spektroskopi Inframerah Berbasis Particle Swarm Optimization (PSO) Yakin, Khusnul; Pramudito, Sidikrubadi; Dahlan, Kiagus
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 3, No 01 (2013): IJAP VOLUME 03 ISSUE 01 YEAR 2013
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v3i01.1236

Abstract

Hydroxyapatite Ca10(PO4)6(OH)2 is a calcium phosphate compound having biocompatibility properties. FTIR (Fourier Transform Infrared Spectroscopy) was used to determine the characteristics of the hydroxyapatite group. Modeling the functional groups of hydroxyapatite can be used to obtain vibrational frequencies and spring constants. Analysis of energy release function is performed by calculating the dissociation energy. In this paper will be shown the results of theoretical modeling of hydroxyl and phosphate using spring models. Modeling the functional groups OH- obtained spring constant 524,4559 N/m and the absorption wave number 3497,5677 cm-1. Modelling functional groups PO43-obtained spring constant 612,2704 N/m and the wave number 1085,2559 cm-1 absorption. The constant and absorption wave numbers obtained are used to calculate the dissociation energy. OH- dissociation energy obtained by 566,5637 kJ/mol and the dissociation energy of PO43- is 567,6248 kJ/mol. Absorption wave numbers are obtained in accordance with experimental results on sometrik stretch modes, and the dissociation energy derived functional group is also close to the value of literature.
STRUKTUR DAN SIFAT OPTIK FILM ZnO HASIL DEPOSISI DENGAN TEKNIK SPIN-COATING MELALUI PROSES SOL-GEL Akhiruddin Maddu; Candra A. Basuki; Irmansyah Irmansyah; Sidikrubadi Pramudito
Jurnal Sains Materi Indonesia Vol 7, No 3: JUNI 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (432.191 KB) | DOI: 10.17146/jsmi.2006.7.3.4987

Abstract

STRUKTUR DAN SIFAT OPTIK FILM ZnO HASIL DEPOSISI DENGAN TEKNIK SPIN-COATING MELALUI PROSES SOL-GEL. Film ZnO telah dibuat pada substrat kaca dengan teknik deposisi spin coating melalui proses sol-gel. Pembuatan film ZnO dari prekursor zinc acetate dengan laju putaran 3.000 rpm selama 60 detik di atas pelat spin coater. Film yang diperoleh dikeringkan pada suhu ruang kemudian dilakukan annealing pada suhu 500 oC selama 3 jam. Hasil XRD menunjukkan bahwa film ZnO yang terbentuk adalah polikristal wurtzite heksagonal dengan nilai parameter kisi masing-masing adalah a = 3,290 Å dan c = 5,2531 Å. Ukuran kristal rata-rata ZnO adalah 29,554 nm. Berdasarkan morfologi permukaan hasil foto SEM menunjukkan film ZnO berbentuk lempengan-lempengan (disks) yang tidak seragamdan tidak beraturan. Karakterisasi spektroskopi UV-Vis menghasilkan karakteristik optik film ZnO, yaitu spektrum transmitansi optik dalam rentang panjang gelombang 370 nm sampai dengan 970 nm. Dari data spektrum UV-Vis tersebut ditentukan lebar celah energi ZnO sebesar 3,2 eV.
Co-Authors Akhiruddin Maddu Candra A. Basuki Irmansyah Irmansyah Kiagus Dahlan Yakin, Khusnul