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The influence of mo...
The influence of molecular mobility on the properties of networks of gold nanoparticles and organic ligands
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- Devid, E. J. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Martinho, P. N. (author)
- Universidade de Lisboa,University of Lisbon,Karlsruher Institut für Technologie (KIT),Karlsruhe Institute of Technology (KIT)
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- Mutta, Venkata Kamalakar, 1979 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Prendergast, U. (author)
- Dublin City University
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- Kubel, C. (author)
- Karlsruher Institut für Technologie (KIT),Karlsruhe Institute of Technology (KIT)
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- Lemma, T. (author)
- Dublin City University
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- Dayen, J. F. (author)
- Université de Strasbourg,University of Strasbourg
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- Keyes, T. E. (author)
- Dublin City University
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- Doudin, B. (author)
- Université de Strasbourg,University of Strasbourg
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- Ruben, M. (author)
- Université de Strasbourg,University of Strasbourg,Karlsruher Institut für Technologie (KIT),Karlsruhe Institute of Technology (KIT)
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- van der Molen, S. J. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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(creator_code:org_t)
- 2014-09-29
- 2014
- English.
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In: Beilstein Journal of Nanotechnology. - : Beilstein Institut. - 2190-4286. ; 5:1, s. 1664-1674
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Abstract
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- We prepare and investigate two-dimensional (2D) single-layer arrays and multilayered networks of gold nanoparticles derivatized with conjugated hetero-aromatic molecules, i.e., S-(4-{[2,6-bipyrazol-1-yl)pyrid-4-yl]ethynyl}phenyl) thiolate (herein S-BPP), as capping ligands. These structures are fabricated by a combination of self-assembly and microcontact printing techniques, and are characterized by electron microscopy, UV-visible spectroscopy and Raman spectroscopy. Selective binding of the S-BPP molecules to the gold nanoparticles through Au-S bonds is found, with no evidence for the formation of N-Au bonds between the pyridine or pyrazole groups of BPP and the gold surface. Subtle, but significant shifts with temperature of specific Raman S-BPP modes are also observed. We attribute these to dynamic changes in the orientation and/or increased mobility of the molecules on the gold nanoparticle facets. As for their conductance, the temperature-dependence for S-BPP networks differs significantly from standard alkanethiol-capped networks, especially above 220 K. Relating the latter two observations, we propose that dynamic changes in the molecular layers effectively lower the molecular tunnel barrier for BPP-based arrays at higher temperatures.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Keyword
- gold nanoparticles
- aromatic capping ligands
- molecular charge transport
- surface enhanced Raman spectroscopy
- self-assembly
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Devid, E. J.
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Martinho, P. N.
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Mutta, Venkata K ...
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Prendergast, U.
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Kubel, C.
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Lemma, T.
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show more...
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Dayen, J. F.
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Keyes, T. E.
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Doudin, B.
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Ruben, M.
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van der Molen, S ...
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show less...
- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Nano technology
- Articles in the publication
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Beilstein Journa ...
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Chalmers University of Technology