Oxygen/Carbon Ratio Effects on Surface-Modified Carbon Nanotubes

U.S. Chen; Heng Yi Su; Chung Hao Wang; Han Chang Shih; Chien Te Hsieh; Jin Ming Chen

doi:10.4028/www.scientific.net/JNanoR.2.77

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HomeJournal of Nano ResearchJournal of Nano Research Vol. 2Oxygen/Carbon Ratio Effects on Surface-Modified...

Oxygen/Carbon Ratio Effects on Surface-Modified Carbon Nanotubes

Abstract:

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.

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