Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7139874 | Sensors and Actuators B: Chemical | 2018 | 6 Pages |
Abstract
We propose and demonstrate a dual-channel surface plasmon resonance (SPR) sensor based on a microstructured hollow fiber (MHF), which is available for microfluidic chips. Two channels contain an internal sensing channel inside of the MHF due to the hollow structure, and an external sensing channel outside of the MHF. We employ a fiber grinding-polishing & butt-jointing technology to configure the hollow fiber SPR sensing probe. We plate the gold coatings on the internal and external sensing channels with the thickness of 50â¯nm, respectively. When the refractive index of the testing samples is in the range of 1.333-1.385, the range of resonance wavelengths in the internal sensing channel is 712nm-1010â¯nm, and the range of resonance wavelengths in the external sensing channel is 618nm-700â¯nm. The testing sensitivity of the internal sensing channel is 5645â¯nm/RIU and testing sensitivity of the external sensing channel is 1576â¯nm/RIU. Due to the special structure of the MHF, where an air hole in the MHF, the hollow fiber SPR sensor has the superiority of being easy to be multiplexed in a microfluidic chip system.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Zhihai Liu, Xianhui Yang, Yu Zhang, Yaxun Zhang, Zongda Zhu, Xinghua Yang, Jianzhong Zhang, Jun Yang, Libo Yuan,