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Issue 1, 2016
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An experimental and theoretical investigation of the anisotropic branching in gold nanocrosses

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Abstract

In this work, copper (Cu) species were used as reducing reagents in the colloidal preparation of novel cross-shaped gold (Au) nanostructures in oleylamine. The reduction rate can be controlled through an appropriate choice of Cu species to obtain Au nanocrosses of varying sizes. It was found that the presence of Cu species during the nucleation stage is crucial to the formation of a branched morphology. Further analysis revealed that the four primary branches of the Au nanocrosses grow along the <110> and <001> directions, and that secondary branched growth occurs along the <111> direction. First-principles calculations and phase-field models were used to rationalize the observed preferential branching and understand the morphological evolution of the nanocrosses. These unique cross-like Au nanostructures exhibit strong NIR absorption and remarkable plasmonic properties that make them promising materials for optical and biomedical applications.

Graphical abstract: An experimental and theoretical investigation of the anisotropic branching in gold nanocrosses

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Publication details

The article was received on 16 Oct 2015, accepted on 22 Nov 2015 and first published on 23 Nov 2015


Article type: Paper
DOI: 10.1039/C5NR07182H
Nanoscale, 2016,8, 543-552

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    An experimental and theoretical investigation of the anisotropic branching in gold nanocrosses

    E. Ye, M. D. Regulacio, M. S. Bharathi, H. Pan, M. Lin, M. Bosman, K. Y. Win, H. Ramanarayan, S. Zhang, X. J. Loh, Y. Zhang and M. Han, Nanoscale, 2016, 8, 543
    DOI: 10.1039/C5NR07182H

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