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Nanocomposite thin films for optical temperature sensing

United States Patent

February 14, 2017
View the Complete Patent at the US Patent & Trademark Office
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Embedded Gas and Temperature Sensors for Extreme Environments
The disclosure relates to an optical method for temperature sensing utilizing a temperature sensing material. In an embodiment the gas stream, liquid, or solid has a temperature greater than about C. The temperature sensing material is comprised of metallic nanoparticles dispersed in a dielectric matrix. The metallic nanoparticles have an electronic conductivity greater than approximately 10.sup.-1 S/cm at the temperature of the temperature sensing material. The dielectric matrix has an electronic conductivity at least two orders of magnitude less than the dispersed metallic nanoparticles at the temperature of the temperature sensing material. In some embodiments, the chemical composition of a gas stream or liquid is simultaneously monitored by optical signal shifts through multiple or broadband wavelength interrogation approaches. In some embodiments, the dielectric matrix provides additional functionality due to a temperature dependent band-edge, an optimized chemical sensing response, or an optimized refractive index of the temperature sensing material for integration with optical waveguides.
Ohodnicki, Jr.; Paul R. (Alison Park, PA), Brown; Thomas D. (Finleyville, PA), Buric; Michael P. (Pittsburgh, PA), Matranga; Christopher (Pittsburgh, PA)
U.S. Department of Energy (Washington, DC)
14/ 177,306
February 11, 2014
GOVERNMENT INTERESTS The United States Government has rights in this invention pursuant to the employer-employee relationship of the Government to the inventors as U.S. Department of Energy employees and site-support contractors at the National Energy Technology Laboratory.