Jung, Seung-A Lee, Taek-Seong Kim, Won Mok Lee, Kyeong-Seouk Jeong, Doo Seok Lee, Wook Seong Kim, Inho 2024-01-20T11:34:58Z 2024-01-20T11:34:58Z 2021-09-05 2013-08-07 0022-3727 https://pubs.kist.re.kr/handle/201004/127778 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. English IOP PUBLISHING LTD OPTICAL CHEMICAL SENSOR SELECTIVE ELECTRODES FILM Thickness dependence of surface plasmon resonance sensor response for metal ion detection Article 10.1088/0022-3727/46/31/315104 1 JOURNAL OF PHYSICS D-APPLIED PHYSICS, v.46, no.31 JOURNAL OF PHYSICS D-APPLIED PHYSICS 46 31 scie scopus 000321897700007 2-s2.0-84880355762 Physics, Applied Physics Article OPTICAL CHEMICAL SENSOR SELECTIVE ELECTRODES FILM Sensor Surface plasmon resonance Metalion detection Response time PVC membrane Calcium ion