5th INTERNATIONAL WORKSHOP ON ELECTRODEPOSITED NANOSTRUCTURES 7-9 June 2007, Iasi, Romania	ABSTRACTS

Nanowires by template synthesis: magnetic and thermoelectric transport properties of single nanostructures L. Gravier1,2, S. Serrano-Guisan1 and J.-Ph. Ansermet1 1 Institut de Physique des Nanostructures, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-IPN Station 3, 1015 Lausanne, Switzerland 2 Montena Technologies SA, 1753 Matran, Switzerland E-mail: laurent.gravier@epfl.ch For the need of basic research in magneto-transport, we extensively exploited the template synthesis technique to grow nanowires by electrodeposition in porous templates. I will detail our technique to electrically contact a single nanowire among thousands. This allows the study of the transport properties of single nanostructures. For our research in spintronics, we developed multilayer and granular nanowire structures, and explore various materials like metals, half- and semi-metals and semiconductors. Aiming at the detection of what carriers really experienced, we added to conventional resistance measurements a novel technique to measure the thermoelectrical transport properties such nanowire structures. We took advantage of a laser light as a heat source to performe sensitive lock-in detection of the thermoelectical power (TEP), although the real temperature drop along the nanowire is not directly measured. Nevertheless, this technique also allows the detection of the Peltier-dependent voltage through the experiment called the thermogalvanic voltage (TGV). The pertinence of TEP and TGV measurements will be analysed in terms of structural analysis, by discussing various examples. As a conclusion, we present a prospect of the most interesting application for electrodeposited nanowire structures, in the fields of spintronics, optronics and thermoelectrics.

 
 
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