LOW TEMPERATURE, HIGHLY SENSITIVE NO2 SENSORS BASED ON ZINC STANNATE MICROCUBES

Reference Presenter Authors
(Institution)
Abstract
06-148 NIRAVKUMAR J JOSHI JOSHI, N.J.(University of California, Berkeley); Hayasaka, T.(University of California, Berkeley); Liu, Y.(University of California, Berkeley); Liu, H.(University of California, Berkeley); Oliveira Jr, O.N.(Universidade de São Paulo); Lin, L.(University of California, Berkeley); This work demonstrates the low temperature, highly sensitive NO2 detection with fast recovery time based on Zinc stannate (ZnSnO3) microcubes. Compared with the traditional metal oxide based gas sensors which operate at high temperature (>300 °C), specific accomplishments include: (1) chemiresistive gas responses of the ZnSnO3 sensor for 10 ppm of NO2 at a low temperature of 100 °C; (2) synthesis of ZnSnO3 microcubes with large surface areas for high sensing responses for NO2; (3) the morphology of microcubes for fast adsorption-desorption processes; and (4) n-type gas sensing behavior as the gas sensing mechanism. As such, ZnSnO3 microcubes are promising for the detection of the sub-ppm level of NO2 gas.
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