Journal
SENSORS
Volume 17, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/s17102392
Keywords
SnO2 nanostructure; humidity sensor; nanosphere lithography
Funding
- National Natural Science Foundation of China [11504177, 51602159]
- Natural Science Foundation of Jiangsu Province [BK20160909, BK20171442]
- Open Foundation of State Key Laboratory of Millimeter Waves of Southeast University [K201723]
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Ordered SnO2 nanostructures were prepared as humidity sensors by nanosphere lithography with the magnetron sputtering technique. The X-ray diffraction patterns of SnO2 nanostructures show that all intense diffraction peaks correspond to the crystallographic planes of SnO2. The Atomic Force Microscope (AFM) mage shows that these SnO2 nanostructures exhibited a classic honeycomb structure. The resistance of this sensor was measured to show that the resistance of the sensor decreases with an increase from lower relative humidity (RH) to higher RH. Additionally, the longest response/recovery time was 32 s/42 s for 11-96% RH. The hysteresis for the SnO2 nanostructure sensor was <5%.
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