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      Fabrication of supramolecular n/p-nanowires via coassembly of oppositely charged peptide-chromophore systems in aqueous media

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      Author(s)
      Khalily, M. A.
      Bakan, G.
      Kucukoz, B.
      Topal, A. E.
      Karatay, A.
      Yaglioglu, H. G.
      Dana, A.
      Güler, Mustafa O.
      Date
      2017-07
      Source Title
      ACS Nano
      Print ISSN
      1936-0851
      Publisher
      American Chemical Society
      Volume
      11
      Issue
      7
      Pages
      6881 - 6892
      Language
      English
      Type
      Article
      Item Usage Stats
      214
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      393
      downloads
      Abstract
      Fabrication of supramolecular electroactive materials at the nanoscale with well-defined size, shape, composition, and organization in aqueous medium is a current challenge. Herein we report construction of supramolecular charge-transfer complex one-dimensional (1D) nanowires consisting of highly ordered mixed-stack π-electron donor-acceptor (D-A) domains. We synthesized n-type and p-type β-sheet forming short peptide-chromophore conjugates, which assemble separately into well-ordered nanofibers in aqueous media. These complementary p-type and n-type nanofibers coassemble via hydrogen bonding, charge-transfer complex, and electrostatic interactions to generate highly uniform supramolecular n/p-coassembled 1D nanowires. This molecular design ensures highly ordered arrangement of D-A stacks within n/p-coassembled supramolecular nanowires. The supramolecular n/p-coassembled nanowires were found to be formed by A-D-A unit cells having an association constant (KA) of 5.18 × 105 M-1. In addition, electrical measurements revealed that supramolecular n/p-coassembled nanowires are approximately 2400 and 10 times more conductive than individual n-type and p-type nanofibers, respectively. This facile strategy allows fabrication of well-defined supramolecular electroactive nanomaterials in aqueous media, which can find a variety of applications in optoelectronics, photovoltaics, organic chromophore arrays, and bioelectronics.
      Keywords
      Coassembly
      Conductivity
      Nanowires
      Peptide chromophore
      Self-assembly
      Supramolecular
      Charge transfer
      Electric conductivity
      Fabrication
      Hydrogen bonds
      Nanofibers
      Nanostructured materials
      Nanowires
      Peptides
      Self assembly
      Supramolecular chemistry
      Charge transfer complex
      Coassembly
      Electrical measurement
      Electroactive material
      Electron donor acceptors
      One-dimensional (1D) nanowires
      Organic chromophores
      Supramolecular
      Chromophores
      Permalink
      http://hdl.handle.net/11693/37281
      Published Version (Please cite this version)
      https://doi.org/10.1021/acsnano.7b02025
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      • Institute of Materials Science and Nanotechnology (UNAM) 2258
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