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Tapered Optical Fiber Probe with a Double–substrate Strategy for Surface–enhanced Raman Scattering Detection
Author(s) -
Cao Jie,
Mao Qinghe
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600395
Subject(s) - raman scattering , substrate (aquarium) , analyte , materials science , detection limit , fiber , optical fiber , silver nanoparticle , nanoparticle , raman spectroscopy , optoelectronics , nanotechnology , chemistry , optics , chromatography , oceanography , physics , geology , composite material
We present a double‐substrate fiber probe for the improvement of SERS detection sensitivity by the laser‐induced deposition of silver nanoparticles (AgNPs) on the taper surface of the optical fiber and the addition of highly active AgNPs (prepared by an autoclave reaction method) in the analyte solution. The SERS performance of such fiber probe was evaluated by using 4‐aminothiophenol (4‐ATP) as a target analyte molecule, and the results indicate that double SERS substrate displays higher SERS enhancement compared to each substrate alone or a simple sum of the signals from the two separate substrates. Furthermore, the detection limit of double‐substrate fiber probe for 4‐ATP aqueous solution can be down to 10 −10 M.