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Anisotropic Assembly of Colloidal Nanoparticles: Exploiting Substrate Crystallinity

Hayton, JA; Pauliac-Vaujour, E; Moriarty, P


JA Hayton

E Pauliac-Vaujour

P Moriarty


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.


Hayton, J., Pauliac-Vaujour, E., & Moriarty, P. (2007). Anisotropic Assembly of Colloidal Nanoparticles: Exploiting Substrate Crystallinity. NANO, 2(6),

Journal Article Type Article
Publication Date Dec 1, 2007
Deposit Date May 19, 2008
Publicly Available Date May 19, 2008
Journal Nano
Print ISSN 1793-2920
Publisher World Scientific
Peer Reviewed Peer Reviewed
Volume 2
Issue 6
Keywords nanoparticles; self-assembly; self-organisation; dewetting; silicon; anisotropic; nanorods
Public URL
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Related Public URLs
Additional Information Electronic version of an article published as Nano, 2, 6, 2007, 361-5] [10.1142/S1793292007000714] © [copyright World Scientific Publishing Company] []


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