Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 288, Issue 1, Pages 83-87Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2005.02.086
Keywords
gold nanoparticle; peptide; alpha-helix; monolayer; gold plasmon
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We describe herein the preparation of polypeptide (poly(gamma-benzyl-L-glutamate)) monolayer-covered gold nanoparticles (PBLG(n)SS-Au). Two types of PBLG(n)SS having PBLG segment length n = 20 and 50 were synthesized and successfully attached to the gold nanoparticle surface using the Brust-Schiffern method. The mean sizes of PBLG(n)SS-Au particles and their gold cluster cores in CHCl3, which were evaluated by means of dynamic light scattering and TEM, respectively, demonstrated that the gold cluster surfaces were covered with PBLG monolayers, and their conformation was found to be mainly in alpha-helix on the basis of FT-IR spectroscopy. (c) 2005 Elsevier Inc. All rights reserved.
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