Peptide-Assembled Optically Responsive Nanoparticle Complexes

Joseph M. Slocik,† Felicia Tam,‡ Naomi J. Halas,§ and Rajesh R. Naik*†
Materials and Manufacturing Directorate, Air Force Research Laboratory, WrightPatterson AFB, Ohio 45433-7702, Department of Physics and Astronomy, Rice University, 6100 Main Street, MS-366, Houston, Texas 77005-1892, and Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, MS-366, Houston, Texas 77005-1892
Nano Lett., 2007, 7 (4), pp 1054–1058
DOI: 10.1021/nl070267x
Publication Date (Web): March 23, 2007
Copyright © 2007 American Chemical Society
†

 Materials and Manufacturing Directorate, Air Force Research Laboratory.

,
‡

 Department of Physics and Astronomy, Rice University.

,
§

 Department of Electrical and Computer Engineering, Rice University.

,
*

 Corresponding author. E-mail:  Rajesh.Naik@wpafb.af.mil. Telephone:  937-255-9717.

Abstract

Abstract Image

The design of active nanostructures whose form and properties can be modulated by remote means is an important challenge in nanoscience. Here we report two types of active nanoparticle complexes, with properties controlled by near-infrared illumination, resulting from the assembly of photothermally responsive plasmonic nanoparticles with thermally labile biomolecular linkers. Au nanoshells (NS) and quantum dots (QD) are assembled using coiled-coil peptides into NS−NS and NS−QD complexes. Illumination of the NS−NS complexes results in reversible disassembly reassembly, while illumination of NS−QD complexes results in a large, reproducible modulation of the quantum dot fluorescence without disassembly of the nanoparticle−peptide complex.

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History

  • Published In Issue April 11, 2007
  • Received February 2, 2007
    Revised Manuscript Received March 9, 2007

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