Anisotropic Assembly of Colloidal Nanoparticles: Exploiting Substrate Crystallinity

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

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.

Citation

Hayton, J., Pauliac-Vaujour, E., & Moriarty, P. (2007). Anisotropic Assembly of Colloidal Nanoparticles: Exploiting Substrate Crystallinity. NANO, 2(6), https://doi.org/10.1142/S1793292007000714

• 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
• Electronic ISSN: 1793-7094
• Publisher: World Scientific
• Peer Reviewed: Peer Reviewed
• Volume: 2
• Issue: 6
• DOI: https://doi.org/10.1142/S1793292007000714
• Keywords: nanoparticles; self-assembly; self-organisation; dewetting; silicon; anisotropic; nanorods
• Public URL: https://nottingham-repository.worktribe.com/output/1016377
• 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
• 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]