Journal article
Poly(ethylene oxide) single crystals as templates for Au nanoparticle patterning and asymmetrical functionalization
Macromolecules, v 41(1), pp 149-155
08 Jan 2008
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Considerable attention has been paid to nanoparticle (NP) research because of their fascinating properties and potential applications in nanotechnology and biotechnology. Asymmetrically functionalizing NP is of particular interest because it could directly lead to controlled patterning of NPs for a variety of applications. In this article, we report using 2-dimensional poly(ethylene oxide) (PEO) lamellar single crystals to create a patterned functional (thiol) surface and to immobilize gold NPs (AuNPs). We demonstrate that patterning AuNPs could be achieved by incubating these single crystals with gold sol and the AuNP areal density could be easily controlled by polymer molecular weight as well as the incubation time. Melting and recrystallization of the AuNP-covered PEO single crystals led to dewetting of PEO. AuNP chains were also observed during the recry stallization process, which was attributed to the dendritic growth of edge-on PEO crystals. Furthermore, this unique technique also enables asymmetric functional i zation of AuNPs. Free-standing bilayer AuNP/PEO films were obtained. Dissolving PEO single crystals led to free asymmetrically functionalized AuNPs and AuNP complexes. This approach provides a novel means to pattern AuNPs and synthesize asymmetrically functionalized AuNPs. We also anticipate that this methodology could be applied to other metal or semiconductor NPs.
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Details
- Title
- Poly(ethylene oxide) single crystals as templates for Au nanoparticle patterning and asymmetrical functionalization
- Creators
- Bing Li - A.J. Drexel Nanotechnology Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, and W.M. Keck Electron Microscopy Facility, Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716Chaoying Ni - A.J. Drexel Nanotechnology Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, and W.M. Keck Electron Microscopy Facility, Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716Christopher Y. Li - A.J. Drexel Nanotechnology Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, and W.M. Keck Electron Microscopy Facility, Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716
- Publication Details
- Macromolecules, v 41(1), pp 149-155
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 7
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000252045600021
- Scopus ID
- 2-s2.0-39149137211
- Other Identifier
- 991019169634404721
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Polymer Science