Thermal Emissivity-Based Chemical Spectroscopy through Evanescent Tunneling.

Poole, Zsolt L; Ohodnicki, Paul R · Adv Mater · 2016

basic_science · Level V

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Abstract

A new spectroscopic technique is presented, with which environmentalchemistry-induced thermal emissivity changes of thin films are extracted with high isolation through evanescent tunneling. With this method the hydrogen-induced emissivity changes of films of TiO2 , Pd-TiO2 , and Au-TiO2 , with properties of high conductivity, hydrogen chemisorption, and plasmonic activity, are characterized in the UV-vis and NIR wavelength ranges, at 1073 K.