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APS » Journals » Phys. Rev. Lett. » Volume 102 » Issue 5
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Phys. Rev. Lett. 102, 058303 (2009) [4 pages]

Assembly of Gold Nanoparticles into Microwire Networks Induced by Drying Liquid Bridges

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Ivan U. Vakarelski1,2,*, Derek Y. C. Chan3,4, Takashi Nonoguchi1, Hiroyuki Shinto1, and Ko Higashitani1,†
1Department of Chemical Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
2Institute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island, 627833, Singapore
3Particulate Fluids Processing Centre, University of Melbourne, Parkville, Victoria 3010, Australia
4Department of Mathematics, National University of Singapore, 117543, Singapore

Received 23 October 2008; published 4 February 2009

See accompanying Physics Synopsis

Large interconnected gold wire structures (∼cm2) of different topologies have been made by the drying of a gold nanoparticle suspension that has formed a connected network of liquid bridges in the interstices between a 2D crystalline layer of latex particles and a substrate. Slow evaporation of the suspending medium assembles the nanoparticles into a periodic or disordered conducting network of micrometer thick gold wires on the substrate. The presence of surfactants in the suspension is critical to maintaining the stability of the liquid bridge network during the evaporation process.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.058303
DOI:
10.1103/PhysRevLett.102.058303
PACS:
47.57.J−, 47.55.nk, 68.03.Fg, 81.16.Dn

*ivakarelski@gmail.com

†k_higa@cheme.kyoto-u.ac.jp

 
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