Directed self-assembly of nanorod networks: bringing the top down to the bottom up.

Einsle, J. F. and Scheunert, G and Murphy, A and McPhillips, J and Zayats, AV and Pollard, R and Bowman, RM (2012) Directed self-assembly of nanorod networks: bringing the top down to the bottom up. Nanotechnology, 23. p. 505302. ISSN 0957-4484 DOI https://doi.org/10.1088/0957-4484/23/50/505302

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Abstract

Self-assembled electrodeposited nanorod materials have been shown to offer an exciting landscape for a wide array of research ranging from nanophotonics through to biosensing and magnetics. However, until now, the scope for site-specific preparation of the nanorods on wafers has been limited to local area definition. Further there is little or no lateral control of nanorod height. In this work we present a scalable method for controlling the growth of the nanorods in the vertical direction as well as their lateral position. A focused ion beam pre-patterns the Au cathode layer prior to the creation of the anodized aluminium oxide (AAO) template on top. When the pre-patterning is of the same dimension as the pore spacing of the AAO template, lines of single nanorods are successfully grown. Further, for sub-200 nm wide features, a relationship between the nanorod height and distance from the non-patterned cathode can be seen to follow a quadratic growth rate obeying Faraday's law of electrodeposition. This facilitates lateral control of nanorod height combined with localized growth of the nanorods.

Item Type:	Article
Uncontrolled Keywords:	NILAREP;
Subjects:	03 - Mineral Sciences
Divisions:	03 - Mineral Sciences
Journal or Publication Title:	Nanotechnology
Volume:	23
Page Range:	p. 505302
Identification Number:	https://doi.org/10.1088/0957-4484/23/50/505302
Depositing User:	Sarah Humbert
Date Deposited:	27 Mar 2015 14:57
Last Modified:	27 Mar 2015 14:57
URI:	http://eprints.esc.cam.ac.uk/id/eprint/3260

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