A surface-enhanced Raman scattering (SERS)-active optical fiber sensor based on a three-dimensional sensing layer

Chunyu Liu, Shaoyan Wang, Gang Chen, Shuping Xu, Qiong Jia, Ji Zhou, Weiqing Xu
2014 Sensing and Bio-Sensing Research  
To fabricate a new surface-enhanced Raman scattering (SERS)-active optical fiber sensor, the design and preparation of SERS-active sensing layer is one of important topics. In this study, we fabricated a highly sensitive three-dimensional (3D) SERS-active sensing layer on the optical fiber terminal via in situ polymerizing a porous polymer material on a flat optical fiber terminal through thermal-induced process, following with the photochemical silver nanoparticles growth. The polymerized
more » ... er formed a 3D porous structure with the pore size of 0.29-0.81 lm, which were afterward decorated with abundant silver nanoparticles with the size of about 100 nm, allowing for higher SERS enhancement. This SERS-active optical fiber sensor was applied for the determination of 4-mercaptopyridine, crystal violet and maleic acid The enhancement factor of this SERS sensing layer can be reached as about 10 8 . The optical fiber sensor with high sensitive SERS-active porous polymer is expected for online analysis and environment detection.
doi:10.1016/j.sbsr.2014.06.004 fatcat:7tkukbx4y5efjnydg7avlalqpu