Terpene detection based on localized surface plasma resonance of thiolate-modified Au nanoparticles

Bin Chen, Chuanjun Liu, Manami Ota, Kenshi Hayashi

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The detection of terpene vapors, a group of biomarker vapors emitted by plants during their growth process, is an efficient way to monitor plant growth status and control plant pests and disease. In this study, a gas sensor based on the localized surface plasma resonance (LSPR) of Au nanoparticles (Au NPs) is proposed for the terpene vapors detection. Au ion sputtering method is used to deposit Au NPs on transparent glass substrates. The dependence of transmission spectra on the morphology of Au NPs prepared by different sputtering conditions is investigated. In order to enhance the sensitivity and selectivity of the sensor, thiolate modification is applied to form the selective soluble monolayer on the surface of Au NPs. The results indicate that different thiolates could form different steric capping layers, and the responding ability of the LSPR sensor is verified by a red-shift of the minimum transmittance in wavelength (Δλmin) and a decrease in the minimum transmittance (ΔTmin) upon exposure to terpene vapors.

Original languageEnglish
Article number6374202
Pages (from-to)1307-1314
Number of pages8
JournalIEEE Sensors Journal
Volume13
Issue number4
DOIs
Publication statusPublished - Feb 20 2013

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

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