Zhang L L, Chen X, Sun J H, Cai H Y, Li H, Chao Y P, Cui D F
State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, China.
Rev Sci Instrum. 2013 Mar;84(3):035001. doi: 10.1063/1.4792602.
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.
本文介绍了一种基于低成本、便捷的聚二甲基硅氧烷（PDMS）棱镜的表面等离子体共振（SPR）成像系统，该棱镜与金膜紧密接触。与传统玻璃棱镜相比，数值模拟和实验研究均表明，基于PDMS的棱镜具有更深但更宽的吸收峰以及更高的耦合角。通过对氦气和空气的循环检测对系统重复性进行了量化，并研究了流速的影响。此外，SPR系统检测并区分了五种气体（氮气、空气、氧气、氢气和氦气），计算得出的灵敏度为5×10^(-6) RIU。
