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 adsorbed 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:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 6176798
- Patent Number(s):
- 7126159
- Application Number:
- ON: DE89010957
- Assignee:
- Dept. of Energy
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; FIBER OPTICS; OPTICAL PROPERTIES; COATINGS; DESIGN; ELECTRODES; INVENTIONS; RAMAN SPECTROSCOPY; LASER SPECTROSCOPY; PHYSICAL PROPERTIES; SPECTROSCOPY; 440300* - Miscellaneous Instruments- (-1989)
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., 1987.
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. Mon .
"Fiber optic apparatus for detecting molecular species by surface enhanced Raman spectroscopy". United States. https://www.osti.gov/servlets/purl/6176798.
@article{osti_6176798,
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 adsorbed 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 = {Mon Nov 30 00:00:00 EST 1987},
month = {Mon Nov 30 00:00:00 EST 1987}
}