Sains Malaysiana 40(3)(2011): 231–235
Detection of
Volatile Organic Compound Gas Using Localized Surface Plasmon Resonance of Gold Nanoparticles
(Pengesanan Gas Sebatian Organik Mudah Meruap Menggunakan Resonans Plasmon Permukaan Tempatan Nanozarah Emas)
Sri Nengsih, Akrajas Ali Umar* & Muhamad Mat Salleh
Institute of Microengineering and Nanoelectronic (IMEN), Universiti Kebangsaan Malaysia
43600, Bangi, Selangor D.E., Malaysia
Muhammad Yahaya
School of Applied Physics, Faculty of Science and Technology
Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor D.E., Malaysia
Received: 15 May 2010 / Accepted: 3 September 2010
ABSTRACT
This paper reports on the
detection of several organic vapors using the unique characteristic of
localized surface plasmon resonance (LSPR)
gold nanoparticles. Gold nanoparticles on quartz substrate were prepared using seed mediated growth method. In a
typical process, gold nanoparticles with average size
ca. 36 nm were obtained to densely grown on the substrate. Detection of gas was
based on the change in the LSPR of the gold nanoparticles film upon the exposure to the gas sample. It was found that gold nanoparticles were sensitive to the presence of volatile
organic compound (VOC) gas from the change in the
surface plasmon resonance (SPR)
intensity. The mechanism for the detection of VOC’s
gas will be discussed.
Keywords: Gold nanoparticles; LSPR; VOC gas
ABSTRAK
Kertas ini melaporkan tentang pengesanan beberapa wap organik menggunakan sifat khas daripada resonans plasma permukaan tempatan (LSPR) nanozarah emas. Nanozarah emas yang difabrikasi pada permukaan substrat kuarza telah disediakan melalui kaedah penumbuhan dengan pengantara benih. Pada proses tipikal, nanozarah emas dengan saiz purata 36 nm telah dihasilkan dan tumbuh dengan padat pada permukaan substrat. Pengesanan gas sebatian organik mudah meruap adalah berdasarkan kepada perubahan LSPR pada filem nanozarah emas apabila didedahkan terhadap sampel gas. Didapati bahawa filem nanozarah emas menunjukkan kepekaan terhadap kehadiran gas sebatian organik mudah meruap melalui perubahan puncak serapan resonans plasmon permukaan (SPR). Mekanisme pengesanan gas sebatian organik mudah meruap akan diperbincangkan.
Kata kunci: Gas mudah meruap; LSPR; nanozarah emas
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*Corresponding
author; email: akrajas@ukm.my
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