Optics: measuring and testing – By dispersed light spectroscopy – With raman type light scattering
Reexamination Certificate
2005-09-20
2005-09-20
Smith, Zandra V. (Department: 2877)
Optics: measuring and testing
By dispersed light spectroscopy
With raman type light scattering
Reexamination Certificate
active
06947132
ABSTRACT:
A thermoelectrically cooled surface-enhanced Raman spectrometer sensor system and method for monitoring of volatile organic compounds in gas, liquid, and soil environments. The sensor system comprises a means for providing an inert gas, a thermal desorption tube containing an adsorbate, and a sample chamber with a SERS structure. For liquid and soil environments, the sensor system also comprises a manifold having a semipermeable membrane for separating moisture from an analyte. An optical module mounted to the sample chamber directs an optical excitation signal for irradiating the SERS structure and receives a SERS optical emissions signal. Such optical emissions signal may be detected by a spectroanalysis system and correlated to a particular analyte by a control processor, which generates an alert signal containing a message that the presence of analyte has been detected. The control processor may also activate warning device, such as an audible siren or a visual alarm.
REFERENCES:
patent: 5255067 (1993-10-01), Carrabba et al.
Easley et al., Enhanced adsorbate Raman scattering from pyridine on silver in ultrahigh vacuum, American Vacuum Society, pp. 629-632, Mar. 1981.
Dick et al., Metal Film over Nanosphere (MFON) Electrodes for Surface Enhanced Raman Spectroscopy (SERS): Improvements in Surface Nanostructure Stability and Suppressio of Irreversible Loss, American Chemical Society, pp. 853-859, published Dec. 27, 2001.
Litorja et al., Surface Enhanced Raman Scattering Detected Temperature Programmed Desorption: Optical Properties, Nanostructures, and Stability of Silver Film over SIO Nanosphere Surfaces, American Chemical Society, pp. 6907-6915, Jun. 16, 2001.
Anderson Gregory Wayne
Andrews John M.
Boss Pamela A.
Lieberman Stephen H.
Kagan Michael A.
Lee Allan Y.
Lipovsky Peter A.
Smith Zandra V.
The United States of America as represented by the Secretary of
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