Respons Optik Nanopartikel Berbahan Paduan Logam Mulia
DOI:
https://doi.org/10.26418/pf.v9i3.51325Abstract
Telah dilakukan simulasi mengenai respons optik nanopartikel paduan logam mulia berdasarkan aproksimasi kuasi-statik elektromagnetika klasik. Penentuan spektrum serapan bahan logam (Qabs) digunakan untuk mengetahui efisiensi kinerja bahan logam. Logam yang digunakan diantaranya emas (Au), perak (Ag), tembaga (Cu) dan tungsten (W). kinerja bahan yang ditinjau meliputi logam murni, logam paduan Au-Ag, Au-Cu, Au-W, Ag-Cu, Ag-W dan Cu-W. Nilai logam murni yang paling tinggi adalah perak (Ag) sedangkan logam paduan bergantung dari jenis logam yang dipadukan diantaranya Au-Ag, Ag-Cu dan Ag-W kadar ketercampuran perak sangat mempengaruhi peningkatan kinerja bahan logam paduan, nilai kinerja tertinggi yaitu fraksi molar perak sama dengan 0,8; untuk logam paduan Au-Cu ketercampuran bahan hampir sama rata di mana nilai serapan berada pada fraksi molar 0,4 dan 0,6; untuk logam paduan Au-W ketercampuran bahan emas sangat mempengaruhi kinerja bahan di mana nilai kinerja tertinggi yaitu fraksi molar emas sama dengan 0,8; sedangkan untuk paduan Cu-W nilai ketercampuran tembaga memperngaruhi kinerja bahan logam di mana kinerja tertinggi yaitu fraksi molar tembaga sama dengan 0,8. Ukuran jari-jari logam juga sangat mempengaruhi peningkatan kinerja bahan logam. Hal ini membuktikan bahwa untuk simulasi logam murni Ag dan logam paduan Au-Ag yang dilakukan hampir sama dengan hasil eksperimen Rioux dkk 2014.
Kata Kunci : Nanopartikel, logam paduan, Spektrum serapan (Qabs), kinerja bahan.
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Date: 24-05-2023
Prisma Fisika
Email: prismafisika@physics.untan.ac.id
