Oxygen/Carbon Ratio Effects on Surface-Modified Carbon Nanotubes
|Periodical||Journal of Nano Research (Volume 2)|
|Main Theme||Journal of Nano Research Vol. 2|
|Citation||U.S. Chen et al., 2008, Journal of Nano Research, 2, 77|
|Online since||August, 2008|
|Authors||U.S. Chen, Heng Yi Su, Chung Hao Wang, Han Chang Shih, Chien Te Hsieh, Jin Ming Chen|
|Keywords||Carbon Nanotube (CNT), Carbon Ratio, Oxygen Ratio, Self-Assembled, Surface Modification|
Carbon nanotubes (CNTs) were functionalized using a simple method of heat treatment under oxygen atmosphere followed by an immersion in a tin nitrate aqueous solution. And well-dispersed SnOx nanodots were decorated on the surface of CNTs. X-ray photoelectron spectroscopy (XPS) analysis showed that the O/C ratio increases with oxygen-treated time. The distribution of carbon-containing functional groups on the CNTs surface, i.e., C−C, C−O, C=O, O−C=O, and π−π* shake up bonds can be identified and deconvoluted by a symmetrical Gauss function. The contact angle of H2O and CNTs is dependent on O/C ration. The relationships between the fraction of carbon-containing functional groups and various oxygen treatment times are also discussed.