Peptide Conjugates for Directing the Morphology and Assembly of 1D Nanoparticle Superstructures |
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Authors: | Chen Zhang Dr Chengyi Song Dr H Christopher Fry Prof Nathaniel L Rosi |
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Institution: | 1. Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260 (USA), Fax: (+01)?412‐624‐8611;2. Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (USA) |
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Abstract: | Designed peptide conjugates molecules are used to direct the synthesis and assembly of gold nanoparticles into complex 1D nanoparticle superstructures with various morphologies. Four peptide conjugates, each based on the gold‐binding peptide (AYSSGAPPMPPF; PEPAu), are prepared: C12H23O‐AYSSGAPPMPP ( 1 ), C12H23O‐AYSSGAPPMPPF ( 2 ), C12H23O‐AYSSGAPPMPPFF ( 3 ), and C12H23O‐AYSSGAPPMPPFFF ( 4 ). The affect that C‐terminal hydrophobic F residues have on both the soft‐assembly of the peptide conjugates and the resulting assembly of gold nanoparticle superstructures is examined. It is shown that the addition of two C‐terminal F residues ( 3 ) leads to thick, branched 1D gold nanoparticle superstructures, whereas the addition of three C‐terminal F residues ( 4 ) leads to bundling of thin 1D nanoparticle superstructures. |
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Keywords: | gold nanoparticles peptides self‐assembly superstructures |
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