Selective photochemical functionalization of surfactant-dispersed single wall carbon nanotubes in water

被引：0
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作者：
Alvarez, Noe T. [1 ,3 ]
Kittrell, Carter [1 ,3 ]
Schmidt, Howard K. [2 ,3 ]
Hauge, Robert H. [1 ,3 ]
Engel, Paul S. [1 ,3 ]
Tour, James M. [1 ,3 ]
机构：
[1] Department of Chemistry, Mechanical Engineering and Materials Science, Rice University, MS 222, Houston, TX 77005, United States
[2] Department of Chemical and Biomolecular Engineering, Rice University, MS 222, Houston, TX 77005, United States
[3] Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, Houston, TX 77005, United States
来源：
Journal of the American Chemical Society | 2008年 / 130卷 / 43期
关键词：
Ultraviolet (UV) irradiation of single wall carbon nanotubes (SWCNTs) individually dispersed in surfactants leads to diameter and type-selective photohydroxylation of the nanotubes. Photohydroxylation of first semiconductor and then small diameter metallic SWCNTs was confirmed after 254 nm UV irradiation in acidic; neutral; and basic aqueous solutions at ambient and elevated temperatures. The increased oxygen content of the SWCNTs after UV irradiation; as detected by X-ray photoelectron spectroscopy; suggests that SWCNTs were hydroxylated by reaction with water. Attenuated total reflectance Fourier transform infrared analysis provides evidence of hydroxyl functional groups on their surface. This photochemical reaction is impeded by molecular oxygen and appears to involve a reactive intermediate generated in the vicinity of semiconducting SWCNTs. This represents a noncontaminating selective reaction in the liquid phase that uses an intrinsic property of the tubes. © 2008 American Chemical Society;
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页码：14227 / 14233
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