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Title: Fiber optic apparatus for detecting molecular species by surface enhanced Raman spectroscopy

Abstract

Optrode apparatus for detecting constituents of a fluid medium includes an optical fiber having a metal coating on at least a portion of a light transmissive core. The metal is one, such as silver, gold or copper, which enhances emission of Raman signal frequencies by molecules adsorbed on the surface of the coating when monochromatic probe light of a different frequency is scattered by such molecules and the metal coating is sufficiently thin to transmit light between the absorbed molecules and the core of the fiber. Probe light is directed into one end of the fiber and a detector analyzes light emitted from the fiber for Raman frequencies that identify one or more particular molecular species. In one form, the optrode may function as a working electrode of an electrochemical cell while also serving to detect the products of oxidation or reduction reactions which occur at the electrode surface. 6 figs.

Inventors:
;
Issue Date:
OSTI Identifier:
7070344
Patent Number(s):
4781458
Application Number:
PPN: US 7-126159
Assignee:
Dept. of Energy, Washington, DC (United States)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Patent File Date: 30 Nov 1987
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DATA ACQUISITION SYSTEMS; DESIGN; FLUIDS; RAMAN SPECTROSCOPY; SPECTROMETERS; AUGMENTATION; DATA ACQUISITION; FIBER OPTICS; LIGHT TRANSMISSION; LASER SPECTROSCOPY; MEASURING INSTRUMENTS; SPECTROSCOPY; 400102* - Chemical & Spectral Procedures

Citation Formats

Angel, S M, and Sharma, S K. Fiber optic apparatus for detecting molecular species by surface enhanced Raman spectroscopy. United States: N. p., 1988. Web.
Angel, S M, & Sharma, S K. Fiber optic apparatus for detecting molecular species by surface enhanced Raman spectroscopy. United States.
Angel, S M, and Sharma, S K. Tue . "Fiber optic apparatus for detecting molecular species by surface enhanced Raman spectroscopy". United States.
@article{osti_7070344,
title = {Fiber optic apparatus for detecting molecular species by surface enhanced Raman spectroscopy},
author = {Angel, S M and Sharma, S K},
abstractNote = {Optrode apparatus for detecting constituents of a fluid medium includes an optical fiber having a metal coating on at least a portion of a light transmissive core. The metal is one, such as silver, gold or copper, which enhances emission of Raman signal frequencies by molecules adsorbed on the surface of the coating when monochromatic probe light of a different frequency is scattered by such molecules and the metal coating is sufficiently thin to transmit light between the absorbed molecules and the core of the fiber. Probe light is directed into one end of the fiber and a detector analyzes light emitted from the fiber for Raman frequencies that identify one or more particular molecular species. In one form, the optrode may function as a working electrode of an electrochemical cell while also serving to detect the products of oxidation or reduction reactions which occur at the electrode surface. 6 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {11}
}