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Interaction of single-walled carbon nanotubes with poly(propyl ether imine) dendrimers

Jayamurugan, G and Vasu, KS and Rajesh, YBRD and Kumar, S and Vasumathi, V and Maiti, PK and Sood, AK and Jayaraman, N (2011) Interaction of single-walled carbon nanotubes with poly(propyl ether imine) dendrimers. In: Journal of Chemical Physics, 134 (10).

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We study the complexation of nontoxic, native poly(propyl ether imine) dendrimers with single-walled carbon nanotubes (SWNTs). The interaction was monitored by measuring the quenching of inherent fluorescence of the dendrimer. The dendrimer-nanotube binding also resulted in the increased electrical resistance of the hole doped SWNT, due to charge-transfer interaction between dendrimer and nanotube. This charge-transfer interaction was further corroborated by observing a shift in frequency of the tangential Raman modes of SWNT. We also report the effect of acidic and neutral pH conditions on the binding affinities. Experimental studies were supplemented by all atom molecular dynamics simulations to provide a microscopic picture of the dendrimer-nanotube complex. The complexation was achieved through charge transfer and hydrophobic interactions, aided by multitude of oxygen, nitrogen, and n-propyl moieties of the dendrimer. (C) 2011 American Institute of Physics. doi:10.1063/1.3561308]

Item Type: Journal Article
Publication: Journal of Chemical Physics
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Chemical Sciences > Organic Chemistry
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 27 Apr 2011 05:14
Last Modified: 27 Apr 2011 05:14
URI: http://eprints.iisc.ac.in/id/eprint/37153

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