Dresden 2014 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 34: Poster Session

MM 34.22: Poster

Dienstag, 1. April 2014, 18:00–20:00, P4

Crystalline structure of silver nanowires within a soft template — •Egon Steeg, Frank Polzer, Holm Kirmse, Yan Qiao, Jürgen P. Rabe, and Stefan Kirstein — Institut für Physik, Humboldt-Universität zu Berlin

The reduction of AgNO3 in the presence of tubular J-aggregates was used to prepare silver nanowires [1]. These wires are about 7 nm in diameter and have lengths exceeding micrometers. Within the wires single crystalline domains with length exceeding 100 nm are found by means of high resolution transmission electron microscopy (HRTEM). The structure of these domains is analyzed further by selected area electron diffraction (SAED) on single nanowires. The resulting diffraction pattern cannot be explained by the simple silver fcc lattice, although energy-dispersive X-ray spectroscopy on the wires confirms the chemical composition of silver. Different structure models are discussed taking into account stacking faults [2], internal strain, and the formation of silver complexes with organic components.

[1] D.M. Eisele et al., J. Am. Chem. Soc. 132 (2010) 2104.

[2] V. Germain et al., J. Phys. Chem. B, Vol. 107, No. 34, 2003

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