Optical actuation of inorganic/organic interfaces: comparing peptide-azobenzene ligand reconfiguration on gold and silver nanoparticles Palafox-Hernandez, J. Pablo, Lim, Chang-Keun, Tang, Zhenghua, Drew, Kurt L. M., Hughes, Zak E., Li, Yue, Swihart, Mark T., Prasad, Paras N., Knecht, Marc R. and Walsh, Tiffany R. 2016, Optical actuation of inorganic/organic interfaces: comparing peptide-azobenzene ligand reconfiguration on gold and silver nanoparticles, ACS applied material interfaces, vol. 8, no. 1, pp. 1050-1060, doi: 10.1021/acsami.5b11989. Attached Files Name Description MIMEType Size Downloads Title Optical actuation of inorganic/organic interfaces: comparing peptide-azobenzene ligand reconfiguration on gold and silver nanoparticles Author(s) Palafox-Hernandez, J. Pablo Lim, Chang-Keun Tang, Zhenghua Drew, Kurt L. M. Hughes, Zak E. orcid.org/0000-0003-2166-9822 Li, Yue Swihart, Mark T. Prasad, Paras N. Knecht, Marc R. Walsh, Tiffany R. orcid.org/0000-0002-0233-9484 Journal name ACS applied material interfaces Volume number 8 Issue number 1 Start page 1050 End page 1060 Total pages 11 Publisher ACS Publications Place of publication Washington, D.C. Publication date 2016-01-13 ISSN 1944-8252 Keyword(s) bionanocombinatorics peptides conformational switching nanoparticles azobenzene Summary Photoresponsive molecules that incorporate peptides capable of material-specific recognition provide a basis for biomolecule-mediated control of the nucleation, growth, organization, and activation of hybrid inorganic/organic nanostructures. These hybrid molecules interact with the inorganic surface through multiple noncovalent interactions which allow reconfiguration in response to optical stimuli. Here, we quantify the binding of azobenzene-peptide conjugates that exhibit optically triggered cis-trans isomerization on Ag surfaces and compare to their behavior on Au. These results demonstrate differences in binding and switching behavior between the Au and Ag surfaces. These molecules can also produce and stabilize Au and Ag nanoparticles in aqueous media where the biointerface can be reproducibly and reversibly switched by optically triggered azobenzene isomerization. Comparisons of switching rates and reversibility on the nanoparticles reveal differences that depend upon whether the azobenzene is attached at the peptide N- or C-terminus, its isomerization state, and the nanoparticle composition. Our integrated experimental and computational investigation shows that the number of ligand anchor sites strongly influences the nanoparticle size. As predicted by our molecular simulations, weaker contact between the hybrid biomolecules and the Ag surface, with fewer anchor residues compared with Au, gives rise to differences in switching kinetics on Ag versus Au. Our findings provide a pathway toward achieving new remotely actuatable nanomaterials for multiple applications from a single system, which remains difficult to achieve using conventional approaches. Language eng DOI 10.1021/acsami.5b11989 Field of Research 030302 Nanochemistry and Supramolecular Chemistry 030303 Optical Properties of Materials 030406 Proteins and Peptides 030603 Colloid and Surface Chemistry 030704 Statistical Mechanics in Chemistry Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences HERDC Research category C1 Refereed article in a scholarly journal ERA Research output type C Journal article Copyright notice ©2015, American Chemical Society Persistent URL http://hdl.handle.net/10536/DRO/DU:30081010 Document type: Journal Article Collections: Institute for Frontier Materials GTP Research Related Links Link Description Connect to published version Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Fri, 29 Jan 2016, 08:19:50 EST Mon, 18 Apr 2016, 10:57:22 EST Mon, 18 Apr 2016, 12:45:16 EST Mon, 18 Apr 2016, 13:24:52 EST Thu, 12 May 2016, 13:57:45 EST Tue, 26 Jul 2016, 09:58:10 EST Tue, 26 Jul 2016, 10:04:19 EST Thu, 11 Aug 2016, 12:30:32 EST Wed, 17 Aug 2016, 10:39:02 EST Thu, 18 Aug 2016, 14:51:58 EST Mon, 22 Aug 2016, 12:30:41 EST Thu, 15 Sep 2016, 15:19:27 EST Thu, 15 Sep 2016, 15:20:12 EST Fri, 10 Feb 2017, 15:02:54 EST Filtered Full Citation counts:   Cited 16 times in TR Web of Science Cited 16 times in Scopus Search Google Scholar Access Statistics: 483 Abstract Views, 7 File Downloads  -  Detailed Statistics Created: Mon, 18 Apr 2016, 10:57:22 EST

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