Title :
Single-Walled Carbon Nanotubes as a Chemical Sensor for SO2 Detection
Author :
Yu, SeGi ; Yi, Whikun
Author_Institution :
Hankuk Univ. of Foreign Studies, Youngin
Abstract :
Single-walled carbon nanotubes (SWNTs) are Introduced as a chemical sensor for the detection of sulfur dioxide (SO2) molecules. For a single bundle of SWNTs, current-voltage (I-V) curves were measured for a series of different temperatures under adsorption of SO2 molecules. The I-V characteristics for a "MAT"-type thin film SWNTs, with respect to the amount of SO2 adsorbed, were measured at room temperature and compared directly with O2 adsorption. The change in current upon the adsorption of SO2 is distinctly higher than that of O2, and is also reversible for adsorption and successive evacuation. Thus, the results strongly suggested that a thin film of SWNTs can be used as a chemical sensor in the nanometer scale devices.
Keywords :
adsorption; carbon nanotubes; chemical sensors; sulphur compounds; thin films; C; SO2; SWNT; adsorption; chemical sensor; nanometer scale devices; single-walled carbon nanotubes; sulfur dioxide molecules; temperature 293 K to 298 K; thin film; Carbon nanotubes; Chemical sensors; Current measurement; Gas detectors; Nanoscale devices; Temperature measurement; Temperature sensors; Thin film devices; Thin film sensors; Transistors; $I$ –$V$ curve; Chemical sensor; single-walled carbon nanotube; sulfur dioxide;
Journal_Title :
Nanotechnology, IEEE Transactions on
DOI :
10.1109/TNANO.2007.903800
