<P>The chemiresistive sensing characteristics of metal oxide gas sensors depend closely on ambient humidity. Herein, we report that gas sensors using Tb-doped SnO<SUB>2</SUB> yolk-shell spheres can be used for reliable acetone detect...
http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
https://www.riss.kr/link?id=A107472898
2018
-
SCOPUS,SCIE
학술저널
18886-18894(9쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>The chemiresistive sensing characteristics of metal oxide gas sensors depend closely on ambient humidity. Herein, we report that gas sensors using Tb-doped SnO<SUB>2</SUB> yolk-shell spheres can be used for reliable acetone detect...
<P>The chemiresistive sensing characteristics of metal oxide gas sensors depend closely on ambient humidity. Herein, we report that gas sensors using Tb-doped SnO<SUB>2</SUB> yolk-shell spheres can be used for reliable acetone detection, regardless of the variations in humidity. Pure SnO<SUB>2</SUB> and Tb-doped SnO<SUB>2</SUB> yolk-shell spheres were prepared via ultrasonic spray pyrolysis and their chemiresistive sensing characteristics were studied. The sensor resistance and gas response of the pure SnO<SUB>2</SUB> yolk-shell spheres significantly changed and deteriorated upon exposure to moisture. In stark contrast, the Tb-doped SnO<SUB>2</SUB> yolk-shell spheres exhibited similar gas responses and sensor resistances in both dry and humid [relative humidity (RH) 80%] atmospheres. In addition, the Tb-doped SnO<SUB>2</SUB> yolk-shell sensors showed a high gas response (resistance ratio) of 1.21 to the sub-ppm-levels (50 ppb) of acetone with low responses to the other interference gases. The effects of Tb oxide and the chemical interactions among the Tb oxide, SnO<SUB>2</SUB>, and water vapor on this humidity-independent gas sensing behavior of the Tb-doped SnO<SUB>2</SUB> yolk-shell sensors were investigated. This strategy can provide a new road to achieve highly sensitive, selective, and humidity-independent sensing of acetone, which will facilitate miniaturized and real-time exhaled breath analysis for diagnosing diabetes.</P>
[FIG OMISSION]</BR>