gas adsorption of single carbon nanotube
Recently, gas adsorption of carbon nanotube becomes a inportant issue for both fundamental research and technique application of nanotubes attributed to the dramatical find of sensitivity of oxygen adsorbed of electronic properties by Collins. et al. [Science, 287,1801]. In particular, the effect of gas adsorption on the electronic properties of carbon nanotube have recently received certain attentions both experimental and theoretical. The electronic and transport properties are found to be sensitive gases. Thus, it is possible to construct chemical sensors based on carbon nanotubes or develop nanoelectronics device using carbon nanotubes droped with gas adsorption. For example, SWNT materials exposed in air constitute the p-type part in the p-n junction of nanotube based transistor.