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

Joshua Einsle, Gunther Scheunert, Antony Murphy, John McPhillips, Anatoly Zayats, Robert Pollard, Robert Bowman

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
782 Downloads (Pure)

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 biosening and magnetics. However, until now, the scope for site-specific preparation of the nanorods on wafers is 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 (FIB) 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 to 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 non-patterned cathode can be seen to follow a quadratic growth rate obeying Faradays law of electrodeposition. This facilitates lateral control of nanorod height combined with localised growth of the nanorods.
Original languageEnglish
Article number505302
JournalNanotechnology
Volume23
Issue number50
Early online date26 Nov 2012
DOIs
Publication statusPublished - 21 Dec 2012

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