Electrokinetic assembly of one-dimensional nanoparticle chains with cucurbit[7]uril controlled subnanometer junctions.

Hüsken, Nina; Taylor, Richard W; Zigah, Dodzi; Taveau, Jean-Christophe; Lambert, Olivier; Scherman, Oren A; Baumberg, Jeremy J; Kuhn, Alexander · Nano Lett · 2013

basic_science · Level V

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Abstract

One-dimensional (1D) nanoparticle chains with defined nanojunctions are of strong interest due to their plasmonic and electronic properties. A strategy is presented for the assembly of 1D gold-nanoparticle chains with fixed and rigid cucurbit[n]uril-nanojunctions of 9 Å. The process is electrokinetically accomplished using a nanoporous polycarbonate membrane and controlled by the applied voltage, the nanoparticle/CB[n] concentration ratio, time and temperature. The spatial structure and time-resolved analysis of chain plasmonics confirm a growth mechanism at the membrane nanopores.

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