A Performance-Enhanced Bimetallic Chip for the Detection of Cadmium Ions with Surface Plasmon Resonance
A Performance-Enhanced Bimetallic Chip for the Detection of Cadmium Ions with Surface Plasmon Resonance
复制标题
一种用于表面等离子体共振检测镉离子的性能增强型双金属芯片
DOI：
10.1007/s11468-015-0150-9
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发表时间：
2016-08-01
期刊：
影响因子：
3
通讯作者：
Wang, Xiaoping
中科院分区：
文献类型：
--
作者：
Pang, Kai;Dong, Wei;Wang, Xiaoping
We demonstrate that a designed bimetallic chip is capable of improving the performance of a surface plasmon resonance (SPR) sensor based on angular interrogation. Through a numerical simulation and a refractometry experiment, we prove that this bimetallic chip can effectively reduce the noise level by about a factor of 2 compared to the traditional SPR sensors that only use a single gold film. The bimetallic chip presents a lower refractive index resolution of 5.3 x 10(-7) refractive index units. In addition, the enhancement of the electric field intensity at the surface of the configuration by a factor of 2 makes it possible to have a high sensitivity in a larger region, which promotes the biosensing applications of the chip. Through a simple and novel method for the detection of cadmium ions (Cd2+) based on the bimetallic configuration, a detection level for Cd2+ (0.01 mu M or 1.12 ppb) can be realized, which compares favorably with similar studies.
