A single light spot GC detector employing localized surface plasmon resonance of porous Au@SiO2 nanoparticle multilayer

Pei Ying Lin, Guarn Yi Le, Wei I. Chiu, Rih Sheng Jian, Chia-Jung Lu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper describes the synthesis of a nano-porous multilayered film consisting of Au@SiO2 nanoparticles. This film was used to miniaturize the size of a localized surface plasmon resonance (LSPR)-based capillary gas chromatograph (GC) detector. A layer-by-layer (LbL) approach with proper surface reaction sequences was used to create a multilayer structure that consisted of as many as five layers of Au@SiO2 nanoparticles. The center wavelength of LSPR was shifted from 520 to 634 nm due to the approximation of additional layers of nanoparticles. The vapor response time for this Au@SiO2 multilayer LSPR sensor was identical to that of an Au nanoparticle monolayer, which confirmed that this multilayer structure has a high level of gas permeability. The multilayer was synthesized inside a glass capillary for use as a GC detector. Due to the enhancement of absorbance, the gas chromatographic signal was obtained via a single spotlight that penetrated one side of the glass capillary and was then reflected by a silver mirror coated on the opposite side. The detection limits were ≤20 ng for cyclohexanone and m-xylene.

Original languageEnglish
Pages (from-to)698-706
Number of pages9
JournalAnalyst
Volume144
Issue number2
DOIs
Publication statusPublished - 2019 Jan 21

Fingerprint

Gas detectors
Surface Plasmon Resonance
Surface plasmon resonance
Nanoparticles
Multilayers
Gases
Light
gas
Glass
glass
Gas permeability
Surface reactions
xylene
Xylene
absorbance
Silver
Reaction Time
Limit of Detection
Monolayers
Permeability

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

Cite this

A single light spot GC detector employing localized surface plasmon resonance of porous Au@SiO2 nanoparticle multilayer. / Lin, Pei Ying; Le, Guarn Yi; Chiu, Wei I.; Jian, Rih Sheng; Lu, Chia-Jung.

In: Analyst, Vol. 144, No. 2, 21.01.2019, p. 698-706.

Research output: Contribution to journalArticle

Lin, Pei Ying ; Le, Guarn Yi ; Chiu, Wei I. ; Jian, Rih Sheng ; Lu, Chia-Jung. / A single light spot GC detector employing localized surface plasmon resonance of porous Au@SiO2 nanoparticle multilayer. In: Analyst. 2019 ; Vol. 144, No. 2. pp. 698-706.
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