Open AccessSurface-enhanced Raman fiberoptic sensors for remote monitoring
Author(s) -
David L. Stokes,
Jean Pierre Alarie,
Tuan VoDinh
Publication year - 1995
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/102165
Subject(s) - raman scattering , materials science , fabrication , optical fiber , in situ , raman spectroscopy , laser , fiber optic sensor , optoelectronics , signal (programming language) , fiber , nanotechnology , remote sensing , optics , chemistry , computer science , medicine , physics , alternative medicine , organic chemistry , pathology , composite material , programming language , geology
A new sensor design for remote surface-enhanced Raman scattering (SERS) measurements has been developed for environmental applications. The design features the modification of an optical fiber using layers of alumina microparticles and silver coatings for inducing the SERS effect at the sensing probe. A single fiber carries both the laser excitation and the SERS signal radiation, keeping optical parameters at the remote tip simple and consistent. The small tip size achievable with this configuration also demonstrates potential of this new design as a microsensor for in-situ measurement in microenvironments. Details of sensor tip fabrication and optical system design are described. SERS spectra of aqueous environmental samples acquired in-situ using the SERS sensor are also presented to illustrate the effectiveness of the SERS sensor
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