Amino acid adsorption on single-walled carbon nanotubes

College

College of Science

Department/Unit

Physics

Document Type

Conference Proceeding

Source Title

European Physical Journal D

Volume

38

Issue

1

First Page

117

Last Page

120

Publication Date

4-1-2006

Abstract

We investigate and discuss the adsorption of a few amino acids on (3,3) carbon nanotubes and on graphite sheets through calculations within density functional theory. Results show weak binding of the biomolecules on both substrates, but through generally favourable adsorption pathways. Zwitterion adsorption through the charged amine and carboxylate groups are bound stronger to the nanotube surface in comparison to their nonionic counterparts, as well as on histidine, phenylalanine, and cysteine side chain groups fixed in specific orientations. Binding strengths on graphite suggest dissimilar trends for amino acid interactions with increasing nanotube diameter.

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Digitial Object Identifier (DOI)

10.1140/epjd/e2006-00043-1

Disciplines

Physics

Keywords

Carbon nanotubes; Amino acids—Absorption and adsorption

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