Yan Gao et al 2009 Nanotechnology 20 135705 doi:10.1088/0957-4484/20/13/135705
Yan Gao1,2,3, Minmin Shi2,3, Renjia Zhou1,2,3, Chaohua Xue2,3, Mang Wang2,3 and Hongzheng Chen1,2,3,4
Show affiliationsMulti-walled carbon nanotubes (MWCNTs) were supramolecularly functionalized by pyrene-derivatized hydrolyzed poly(styrene-co-maleic anhydride) (pyrene–HSMA) in aqueous solution. The MWCNTs/pyrene–HSMA conjugates were found to exhibit a solvent-dependent fluorescence property by photoluminescence measurements. The fluorescence intensity of the MWCNTs/pyrene–HSMA conjugate was used as a probe to estimate the interaction between polymer and MWCNTs in solvents. The polymer conformation around the MWCNTs was demonstrated by atomic force microscopy. We suggested that pyrene–HSMA functionalized MWCNTs in a non-wrapping mode, and that the conformation change of the polymer around the MWCNTs resulted in the solvent-dependent fluorescence property. The dispersion state of the MWCNTs/pyrene–HSMA conjugate in various solvents was also investigated by transmission electron microscopy. The fluorescence responses of the MWCNTs/pyrene–HSMA conjugate to pH value and temperature were studied as well.
68.37.Lp Transmission electron microscopy (TEM)
Condensed matter: electrical, magnetic and optical
Issue 13 (1 April 2009)
Received 28 November 2008, in final form 26 January 2009
Published 11 March 2009
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