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Anisotropic Assembly of Colloidal Nanoparticles: Exploiting Substrate Crystallinity

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

Authors

JA Hayton

E Pauliac-Vaujour

P Moriarty



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.

Journal Article Type Article
Publication Date Dec 1, 2007
Journal Nano
Print ISSN 1793-2920
Publisher World Scientific
Peer Reviewed Peer Reviewed
Volume 2
Issue 6
APA6 Citation Hayton, J., Pauliac-Vaujour, E., & Moriarty, P. (2007). Anisotropic Assembly of Colloidal Nanoparticles: Exploiting Substrate Crystallinity. NANO, 2(6), doi:10.1142/S1793292007000714
DOI https://doi.org/10.1142/S1793292007000714
Keywords nanoparticles; self-assembly; self-organisation; dewetting; silicon; anisotropic; nanorods
Publisher URL http://www.worldscinet.com/cgi-bin/details.cgi?id=pii:S1793292007000714&type=html
Related Public URLs http://www.nottingham.ac.uk/physics/research/nano
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
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]

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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