Anisotropic Assembly of Colloidal Nanoparticles: Exploiting Substrate Crystallinity

Hayton, JA and Pauliac-Vaujour, E and Moriarty, P (2007) Anisotropic Assembly of Colloidal Nanoparticles: Exploiting Substrate Crystallinity. Nano, 2 (6). p. 361.

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Abstract

We show that the crystal structure of a substrate can be exploited to drive the anisotropic assembly of colloidal nanoparticles. Pentanethiol-passivated Au particles of approximately 2 nm diameter deposited from toluene onto hydrogen-passivated Si(111) surfaces form linear assemblies (rods) with a narrow width distribution. The rod orientations mirror the substrate symmetry, with a high degree of alignment along principal crystallographic axes of the Si(111) surface. There is a strong preference for

anisotropic growth with rod widths substantially more tightly distributed than lengths. Entropic trapping of nanoparticles provides a plausible explanation for the formation of the anisotropic assemblies we observe.

Item Type: Article
Additional Information: Electronic version of an article published as Nano, 2, 6, 2007, 361-5] [10.1142/S1793292007000714] © [copyright World Scientific Publishing Company] [http://www.worldscinet.com/nano/nano.shtml]
Uncontrolled Keywords: nanoparticles; self-assembly; self-organisation; dewetting; silicon; anisotropic; nanorods
Schools/Departments: University of Nottingham UK Campus > Faculty of Science > School of Physics and Astronomy
Related URLs:
URLURL Type
http://www.nottingham.ac.uk/physics/research/nanoAuthor
Depositing User: Moriarty, P.J.
Date Deposited: 19 May 2008 13:38
Last Modified: 19 May 2008 13:38
URI: http://eprints.nottingham.ac.uk/id/eprint/906

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