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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Poster: Nanoparticles, Nanocrystals and Composites

CPP 13.8: Poster

Montag, 7. März 2016, 18:15–21:00, Poster B2

Mechanical properties of molecularly covered silver nanowires investigated by SFM — •Katherine A. Herman¹, Egon Steeg¹, Jürgen P. Rabe^{1, 2}, and Stefan Kirstein¹ — ¹Department of Physics, Humboldt Universität zu Berlin — ²IRIS Adlershof, Humboldt Universität zu Berlin

Silver nanowires with uniform diameters of 6.5 nm were deposited onto solid substrates and investigated using scanning force microscopy (SFM). The wires were synthesized using an established protocol[1] with a soft tubular molecular aggregate template in aqueous solution. Filled and unfilled tubule segments could best be discriminated by the phase contrast of the intermittent contact SFM imaging mode. Contact mode SFM was used to move, bend and break deposited tubules with and without silver wires. Analysis of the broken and dragged segment lengths suggests that the wires break preferentially at certain grain boundaries, as expected for a polycrystalline material. Analysis of the wire conformations indicates that the wires were plastically deformed during deposition.

[1] D. M. Eisele, H. v. Berlepsch, C. Böttcher, K. J. Stevenson, D. A. Vanden Bout, S. Kirstein, J. P. Rabe. J. Am. Chem. Soc., 2010, 132(7), pp 2104-2105.