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Title: Photoacoustic point spectroscopy

Abstract

A system and method are disclosed for generating a photoacoustic spectrum in an open or closed environment with reduced noise. A source may emit a beam to a target substance coated on a detector that measures acoustic waves generated as a result of a light beam being absorbed by the target substance. By emitting a chopped/pulsed light beam to the target substance on the detector, it may be possible to determine the target's optical absorbance as the wavelength of light is changed. Rejection may decrease the intensity of the acoustic waves on the detector while absorption may increase the intensity. Accordingly, an identifying spectrum of the target may be made with the intensity variation of the detector as a function of illuminating wavelength.

Inventors:
 [1];  [2];  [2]
  1. Kingston, TN
  2. Knoxville, TN
Issue Date:
Research Org.:
UT-Battelle LLC/ORNL, Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1019093
Patent Number(s):
7961313
Application Number:
US Patent Application 12/189,652
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Van Neste, Charles W, Senesac, Lawrence R, and Thundat, Thomas G. Photoacoustic point spectroscopy. United States: N. p., 2011. Web.
Van Neste, Charles W, Senesac, Lawrence R, & Thundat, Thomas G. Photoacoustic point spectroscopy. United States.
Van Neste, Charles W, Senesac, Lawrence R, and Thundat, Thomas G. Tue . "Photoacoustic point spectroscopy". United States. https://www.osti.gov/servlets/purl/1019093.
@article{osti_1019093,
title = {Photoacoustic point spectroscopy},
author = {Van Neste, Charles W and Senesac, Lawrence R and Thundat, Thomas G},
abstractNote = {A system and method are disclosed for generating a photoacoustic spectrum in an open or closed environment with reduced noise. A source may emit a beam to a target substance coated on a detector that measures acoustic waves generated as a result of a light beam being absorbed by the target substance. By emitting a chopped/pulsed light beam to the target substance on the detector, it may be possible to determine the target's optical absorbance as the wavelength of light is changed. Rejection may decrease the intensity of the acoustic waves on the detector while absorption may increase the intensity. Accordingly, an identifying spectrum of the target may be made with the intensity variation of the detector as a function of illuminating wavelength.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {6}
}

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