期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 186, 期 -, 页码 103-108出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.05.087
关键词
SnO; Giant chemo-resistance; Gas sensor
Single crystalline SnO micro-disks, synthesized by a carbothermal reduction process, exhibited a nearly 1000-fold increase in resistance upon exposure to 100 ppm of NO2 without addition of catalysts or dopants nor the existence of nano-sized dimensions. Moreover, the SnO displayed a greater than 100-fold selectivity to NO2 over potential interferents including CO, H-2 and CH4. The high sensor signal and exceptional selectivity for this novel sensor material are attributed to the existence of a high density of active lone pair electrons on the exposed (0 01) planes of the single crystalline SnO disks. This, thereby, identifies new means, not utilizing nano-dimensions, to achieve high gas sensitivity. (C) 2013 Elsevier B.V. All rights reserved.
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