Gas Sensing with Bare and Graphene-covered Optical Nano-Antenna Structures.

ABSTRACT: The motivation behind this work is to study the gas phase chemical sensing characteristics of optical (plasmonic) nano-antennas (ONA) and graphene/graphene oxide-covered versions of these structures. ONA are devices that have their resonating frequency in the visible range. The basic principle governing the detection mechanism for ONA is refractive index sensing. The change in the concentration of the analyte results in a differing amount of adsorbate and correlated shifts in the resonance wavelength of the device. In this work, bare and graphene or graphene oxide covered ONA have been evaluated for gas sensing performance. Four different analytes (ethanol, acetone, nitrogen dioxide and toluene) were used in testing. ONA response behavior to different analytes was modified by adsorption wi

SUBMITTER: Mehta B 

PROVIDER: S-EPMC4756381 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature