Nanosensors Based on Responsive Polymer Brushes and Gold Nanoparticle Enhanced Transmission Surface Plasmon Resonance Spectroscopy

Iryna Tokareva, Sergiy Minko,* Janos H. Fendler, and Eliza Hutter*;
Department of Chemistry, Clarkson University, Potsdam, New York 13699
J. Am. Chem. Soc., 2004, 126 (49), pp 15950–15951
DOI: 10.1021/ja044575y
Publication Date (Web): November 18, 2004
Copyright © 2004 American Chemical Society
*

In papers with more than one author, the asterisk indicates the name of the author to whom inquiries about the paper should be addressed.

, sminko@clarkson.edu (S.M.), ; , huttere@clarkson.edu (E.H.)

Abstract

Abstract Image

Swelling (and shrinking) of poly(2-vinylpyridine), P2VP, polymer brushes, caused by pH changes, could be readily monitored by transmission surface plasmon resonance, T-SPR, spectroscopy. Gold nanoparticles attached to the P2VP polymer brushes dramatically enhanced the pH-induced shift in the T-SPR absorption spectra. (A 50 nm shift of the absorption maximum of the T-SPR spectrum of the supporting gold nanoislands was observed upon changing the pH from 5.0 to 2.0, corresponding to a swelling of the polymer brushes from 8.1 ± 0.7 to 24.0 ± 2.0 nm. Same shift in the opposite direction was observed upon changing the pH from 2.0 to 5.0.)

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History

  • Published In Issue December 15, 2004
  • Received September 8, 2004

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