Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 36: Poster: Nanoparticles and Composite Materials
CPP 36.11: Poster
Mittwoch, 16. März 2011, 17:00–19:00, P2
Silver nanowires grown within tubular J-aggregates — Dörthe M. Eisele1, Holm Kirmse1, •Egon Steeg1, Keith J. Stevenson2, David A. Vanden Bout2, Stefan Kirstein1, and Jürgen P. Rabe1 — 1Humboldt-Universität zu Berlin, Germany — 2University of Texas at Austin, USA
It was shown previously that silver nanowires with diameters below 10 nm and length exceeding microns can be grown within tubular J-aggregates by reduction of silver salt [1]. The J-aggregates self assemble from amphiphilic cyanine dyes in aqueous solutions. The silver ions are reduced by oxidizing the dyes.
We report here on the formation of sliver nanowires within the aggregates under various experimental conditions. Since the nucleation is supposed to be photo-assisted the growth is influenced by the choice of illumination time and wavelength of light. Additionally, the growth kinetics plays an important role. We discuss the correlation between these parameters and the structural properties of the wires, such as diameter, length, and crystallinity. These experiments give insight into the nucleation and growth mechanism of metal nanowires within an amphiphilic template in an aqueous environment.
[1] D.M. Eisele, H. v. Berlepsch, C. Böttcher, K.J. Stevenson, D.A. Vanden Bout, S. Kirstein, and J.P. Rabe, JACS 132 (2010) 2104.