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TT: Fachverband Tiefe Temperaturen

TT 23: Transport: Nanoelectronics III - Molecular Electronics

TT 23.2: Vortrag

Mittwoch, 25. März 2009, 09:45–10:00, HSZ 105

Opto-electronic properties of gold nanoparticle arrays — •Christoph Weiß, Markus A. Mangold, and Alexander W. Holleitner — Walter Schottky Institute, Technische Universität München, Am Coulombwall 3, 85748 Garching, Germany

The field of plasmonics has drawn a lot of interest in recent years. It deals with the interaction of metal clusters with light. Special attention was given to the fact that the exciting electric field is strongly enhanced at the surface of metal nanoparticles. Another topic where substantial research efforts are undertaken is the field of molecular electronics. Our research combines the two fields by examining the interaction of light with metal-molecule junctions. To this end, ordered hexagonal arrays of alkanethiol coated gold nanoparticles are produced by self-assembly. In such an array the nanoparticles are separated by nanometer-sized gaps. The nanoparticle arrays are manipulated with a focused ion beam and their opto-electronic properties are probed in the UV and visible spectrum. The strong plasmonic absorption of the nanoparticles can be readily observed in the photoresponse of arrays with alkanethiol coated gold nanoparticles.

We acknowledge the fruitful collaboration with J. Liao, M. Calame, C. Schönenberger, and the NCCR Nanoscience of the Swiss National Science Foundation (SNF) and thank for financial support by the DFG excellence initiative Nanosystems Initiative Munich (NIM).