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Issue 11, 2010
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Mechanistic insights into seeded growth processes of gold nanoparticles

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Abstract

A facile approach for the synthesis of monodisperse gold nanoparticles with radii in the range of 7 to 20 nm is presented. Starting from monodisperse seeds with radii of 7 nm, produced in the first step, the addition of a defined amount of additional precursor material permits distinct size regulation and the realization of predicted nanoparticle sizes. These information were derived from ex- and in situ investigations by comprehensive small angle X-ray scattering (SAXS), X-ray absorption near edge structure (XANES) and UV-Vis data to obtain information on the physicochemical mechanisms. The obtained mechanisms can be transferred to other seeded growth processes. Compared to similar approaches, the presented synthesis route circumvents the use of different reducing or stabilizing agents. The size of resulting nanoparticles can be varied over a large size range presented for the first time without a measurable change in the shape, polydispersity or surface chemistry. Thus, the resulting nanoparticles are ideal candidates for size dependence investigations.

Graphical abstract: Mechanistic insights into seeded growth processes of gold nanoparticles

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Supplementary files

Article information


Submitted
27 Jul 2010
Accepted
18 Aug 2010
First published
29 Sep 2010

Nanoscale, 2010,2, 2463-2469
Article type
Paper

Mechanistic insights into seeded growth processes of gold nanoparticles

J. Polte, M. Herder, R. Erler, S. Rolf, A. Fischer, C. Würth, A. F. Thünemann, R. Kraehnert and F. Emmerling, Nanoscale, 2010, 2, 2463
DOI: 10.1039/C0NR00541J

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