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Rev Sci Instrum. 2013 Mar;84(3):035001. doi: 10.1063/1.4792602.

A poly(dimethylsiloxane) based prism for surface plasmon resonance imaging system and its application for gas detection.

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1
State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, China.

Abstract

This paper presents a surface plasmon resonance (SPR) imaging system based on a low-cost, convenient poly(dimethylsiloxane) (PDMS) prism featured with a close contact with the gold film. Compared to conventional glass prism, both numerical simulations and experimental studies indicated a deeper but wider absorption peak with a higher coupling angle for the PDMS based prism. System repeatability was quantified by the cycled detection of helium and air, with the effect of the flow rate investigated. Furthermore, five types of gases (nitrogen, air, oxygen, hydrogen, and helium) were detected and differentiated by the SPR system, with a calculated sensitivity of 5 × 10(-6) RIU.

PMID:
23556840
DOI:
10.1063/1.4792602
[Indexed for MEDLINE]
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