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Int. J. Mol. Sci. 2008, 9(2), 120-130; doi:10.3390/ijms9020120
Article

Noncovalently Modified Carbon Nanotubes with Carboxymethylated Chitosan: A Controllable Donor-Acceptor Nanohybrid

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Received: 4 January 2008; Accepted: 31 January 2008 / Published: 5 February 2008
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Abstract: We report here the modification of multiwalled carbon nanotubes (MWNTs) with a kind of polysaccharide, carboxymethylated chitosan (cmCs), and their potential usage as donor-acceptor nanohybrids. The modified composites (cmCs/MWNTs) were characterized by high-resolution TEM, FT-IR, TGA and time-resolved spectroscopy. The time-resolved spectroscopic experiments revealed that interfacial electron transfer readily takes place between MWNTs and surface immobilized cmCs chains. The forward electron transfer is fast (> 20 ns) while the backward recombination is slow. The recombination process strongly depends on the chain length of carboxylmethylated chitosan, i.e. a shorter recombination lifetime (~1.1 µs) for the shorter-chain cmCs coated MWNTs against that of the longer-chain cmCs coated MWNTs (~3.5 µs). The results demonstrated that the cmCs/MWNTs composite may be applied as a controllable donor-acceptor nanohybrid.
Keywords: multiwalled carbon nanotubes; carboxymethylated chitosan; charge separation; donor-accepter nanohybrid. multiwalled carbon nanotubes; carboxymethylated chitosan; charge separation; donor-accepter nanohybrid.
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Long, D.; Wu, G.; Zhu, G. Noncovalently Modified Carbon Nanotubes with Carboxymethylated Chitosan: A Controllable Donor-Acceptor Nanohybrid. Int. J. Mol. Sci. 2008, 9, 120-130.

AMA Style

Long D, Wu G, Zhu G. Noncovalently Modified Carbon Nanotubes with Carboxymethylated Chitosan: A Controllable Donor-Acceptor Nanohybrid. International Journal of Molecular Sciences. 2008; 9(2):120-130.

Chicago/Turabian Style

Long, Dewu; Wu, Guozhong; Zhu, Guanglai. 2008. "Noncovalently Modified Carbon Nanotubes with Carboxymethylated Chitosan: A Controllable Donor-Acceptor Nanohybrid." Int. J. Mol. Sci. 9, no. 2: 120-130.



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