Thickness dependence of surface plasmon resonance sensor response for metal ion detection

Title
Thickness dependence of surface plasmon resonance sensor response for metal ion detection
Authors
정승아이택성김원목이경석정두석이욱성김인호
Keywords
Sensor; Surface plasmon resonance; Metalion detection; Response time; PVC membrane; Calcium ion
Issue Date
2013-07
Publisher
Journal of physics D, applied physics
Citation
VOL 46, NO 31, 315104-1-315104-6
Abstract
Surface plasmon resonance (SPR) sensor is one of the most viable technologies for portable and highly sensitive sensing in clinical and environmental applications. A lot of research on SPR sensors based on plasticized polyvinyl chloride (PVC) sensing layers for detection of various metal ions has been well reported, but a study on their correlation between sensing layer thickness and sensor response has been rarely done. The purpose of this study is to investigate thickness dependence of sensing layers on the response time and the sensitivity of SPR sensors based on plasticized PVC. Calcium ionophore was incorporated in the sensing layers for calcium ion detection. Our experimental results showed that thicker sensing layers exhibited higher sensitivity and wider detection range but longer response time. We discussed metal ion diffusion in plasticized sensing layers by correlating numerical calculations with experimental ones in order to understand temporal response of our SPR sensor. The response time also relied on the flow rate of calcium ion solutions, indicating that metal ion diffusion in bulk media is one of the limiting factors.
URI
http://pubs.kist.re.kr/handle/201004/45238
ISSN
00223727
Appears in Collections:
KIST Publication > Article
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