Title :
Chemical sensing with ZnO nanowires
Author :
Fan, Zhiyong ; Lu, Jia G.
Author_Institution :
Dept. of Chem. Eng. & Mater. Sci., California Univ., Irvine, CA
fDate :
Oct. 30 2005-Nov. 3 2005
Abstract :
Zinc oxide nanowires were configured as n-channel field-effect transistors. These transistors were implemented as chemical sensors for detection of various gases. The ammonia sensing behavior of nanowires was observed to switch from oxidizing to reducing when temperature increased from 300 to 500 K. This effect is attributed to the temperature dependent chemical potential shift. Carbon monoxide was found to increase the nanowire conductance in the presence of oxygen. In addition, nanowire detection sensitivity dependence on the diameter was investigated
Keywords :
ammonia; carbon compounds; chemical sensors; field effect transistors; nanowires; zinc compounds; 300 to 500 K; ZnO; ammonia sensing; carbon monoxide; chemical potential shift; chemical sensors; field-effect transistors; zinc oxide nanowires; Chemical sensors; Conducting materials; FETs; Gases; Monitoring; Nanoscale devices; Switches; Temperature dependence; Temperature sensors; Zinc oxide;
Conference_Titel :
Sensors, 2005 IEEE
Conference_Location :
Irvine, CA
Print_ISBN :
0-7803-9056-3
DOI :
10.1109/ICSENS.2005.1597829
