期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 326, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2020.128801
关键词
Amorphous carbon; Tin oxide; Gas sensor; Room temperature
资金
- Basic Science Research Program through the National Research Foundation (NRF) of Korea - Ministry of Education [NRF-2019R1A6A1A11055660, -2016R1A6A1A03013422]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2019R1A2C1006193]
Gas sensors were fabricated by decorating amorphous carbon layers on SnO2 nanowires, without the need for pretreatment or functionalization, and operated at room temperature. The amorphous carbon increased surface area and improved NO(2) gas sensing by providing electronic effects to the SnO2.
We fabricated gas sensors by decorating amorphous carbon layers on the surfaces of SnO2 nanowires. Pretreatment and functionalization were not required for the synthesis of the SnO2-based nanocomposite, requiring only short few-second processing times. A sensing mechanism is proposed to explain the room-temperature (24 degrees C) operation of the gas sensor. The amorphous carbon not only increased the surface area, but also provided electronic effects improving the NO(2 )gas sensing likely by supplying electrons to the SnO2 and/or changing the conducting channel width inside the SnO2 by carrier transfer. The optimized gas sensor, having high response and high selectivity, can be utilized for room-temperature NO2 gas sensing applications.
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