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Lookup NU author(s): Dr Stela Pruneanu, Professor Andrew HoultonORCiD, Dr Ben HorrocksORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Springer New York LLC, 2010.
For re-use rights please refer to the publisher's terms and conditions.
In this article, we have studied and developed two approaches for organizing metallic nanoparticles into one-dimensional assemblies. The first uses DNA as a 'template' and allows the preparation of various silver nanostructures ('beads-on-a-string' or rod-like wires). The conductance of such nanostructures was demonstrated by employing a powerful technique, Electrostatic Force Microscopy (EFM). This technique gave us 'contactless' information about the electrical properties of silver nanostructures, aligned on a SiO2/Si surface. Additionally, I-V characteristics of a single silver nanowire crossing two microelectrodes were recorded. The nanowire resistivity was estimated at 1.46 x 10(-7) Omega m (at 300 K), which is one order of magnitude higher than that of bulk silver (1.6 x 10(-8) Omega m). The second approach is a 'template-free' one, and exploits the binding ability of l-arginine, which favours the self-assembling of capped gold nanoparticles into gold nanochains. The results suggest that gold nanochains were formed due to dipole-dipole interaction between adjacent nanoparticles, which fuse together through an oriented attachment mechanism. Atomic force microscopy, TEM, UV-vis spectroscopy and X-ray diffraction were used to characterize the morphological, optical and structural properties of these metallic nanostructures.
Author(s): Pruneanu S, Olenic L, Al-Said SAF, Borodi G, Houlton A, Horrocks BR
Publication type: Article
Publication status: Published
Journal: Journal of Materials Science
Year: 2010
Volume: 45
Issue: 12
Pages: 3151-3159
Print publication date: 02/03/2010
Date deposited: 23/07/2010
ISSN (print): 0022-2461
ISSN (electronic): 1573-4803
Publisher: Springer New York LLC
URL: http://dx.doi.org/10.1007/s10853-010-4320-z
DOI: 10.1007/s10853-010-4320-z
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