Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 55: Quantum dots and wires: Preparation and characterization

HL 55.2: Talk

Friday, March 16, 2018, 09:45–10:00, A 151

Transport Measurements on Single CdSe Nanowires during Cation Exchange — •Maximilian Schwarz, Christian Strelow, August Dorn, and Alf Mews — Institut für Physikalische Chemie, Universität Hamburg, Grindelallee 117, 20146 Hamburg, Germany

Cation Exchange proved to be a powerful tool for designing the composition of nanoparticles with a given shape. By using the anionic framework of a crystalline nanocrystal, cations can be exchanged topotaxial. Simple reaction routes can establish systems, which are unattainable by standard wet chemical synthesis. Here, we used CdSe Nanowires grown via the solution-liquid-solid (SLS) technique [1] directly on a substrate. The purpose was to get an insight into the reaction dynamics by monitoring the transport characteristics of single CdSe Nanowires during cation exchange to Ag2Se. Throughout the exchange reaction, the change in properties was traced non-invasive via spectroscopic and microscopic methods. We gratefully acknowledge financial support by the DFG via U-4-6-02-DFG-17-08.

[1] A. Dorn et al., Advanced Materials, 2009, 21 (34), pp 3479-3482