title: A surface-enhanced Raman scattering optrode prepared by in situ photoinduced reactions and its application for highly sensitive on-chip detection.
abstract: A surface-enhanced Raman scattering (SERS)-active optical fiber sensor combining the optical fiber waveguide with various SERS substrates has been a powerful analytical tool for in situ and long-distance SERS detection with high sensitivity. The design and modification of a high-quality SERS-active sensing layer are important topics in the development of novel SERS-active optical fiber sensors. Here, we prepared a highly sensitive SERS-active optrode by in situ fabrication of a three-dimensional porous structure on the optical fiber end via a photoinduced polymerization reaction, followed by the growth of photochemical silver nanoparticles above the porous polymer material. The fabrication process is rapid (finished within 1 h) and can be on line under light control. The porous structure supports vast silver nanoparticles, which allows for strong electromagnetic enhancement of SERS. Interestingly, the preparation of this SERS optrode and its utilization for SERS detection can all be conducted in a microfluidic chip. The qualitative and quantitative on-chip SERS sensing of organic pollutants and pesticides has been achieved by this SERS optrode-integrated microfluidic chip, and its high detection sensitivity makes it a promising factor in the analysis of liquid systems.
authors: State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , 2699 Qianjin Avenue, Changchun 130012, China.
authors: Shaoyan
authors: S
authors: Wang
authors: Chunyu
authors: C
authors: Liu
authors: Hailong
authors: H
authors: Wang
authors: Gang
authors: G
authors: Chen
authors: Ming
authors: M
authors: Cong
authors: Wei
authors: W
authors: Song
authors: Qiong
authors: Q
authors: Jia
authors: Shuping
authors: S
authors: Xu
authors: Weiqing
authors: W
authors: Xu