A surface-enhanced Raman scattering (SERS)-active optical fiber sensor based on a three-dimensional sensing layer
Abstract
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 polymer formed a 3D porous structure with the pore size of 0.29–0.81 μm, 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 108. The optical fiber sensor with high sensitive SERS-active porous polymer is expected for online analysis and environment detection. Keywords: Optical fiber sensor, 3D SERS substrate, Porous polymer, Laser-induced growth, Ag nanoparticles
Keywords
chemistry
microscopy
Materials of engineering and construction. Mechanics of materials
Chemical technology
Engineering (General). Civil engineering (General)
Industrial electrochemistry
Technology
Electrical engineering. Electronics. Nuclear engineering
Descriptive and experimental mechanics
Science
physics
analytical chemistry
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60725
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