Dresden 2011 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 20: Innovative Materials
HL 20.2: Talk
Monday, March 14, 2011, 14:45–15:00, POT 06
Self assembly of 1D-nanoparticles at interfaces using external fields — •Anindya Majumder1,3, Oliver Jost2, Jörg Opitz3,4, Gianaurelio Cuniberti3, and Eckhard Beyer1,2 — 1Institute of Surface and Manufacturing Technology, Dresden University of Technology, 01062 Dresden, Germany — 2Fraunhofer IWS, Winterbergstraße 28, 01277 Dresden, Germany — 3Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany — 4Fraunhofer IZFP, Maria-Reiche-Str. 2, 01219 Dresden, Germany
Self-assembly of nanoparticles has promising technological applications since it provides efficient building blocks for physical, chemical, and biological systems. Localization of nanoparticles at liquid-liquid interfaces by manipulating the particle surface energy is an upcoming area with great potential for applied and fundamental research. Apart from regular technological applications, such tailor made assembly opens a window to fabricate self assembled interfacial structured hybrid materials with unique properties. Carbon nanotubes (CNTs) represent an anisotropic and perfectly one-dimensional class of nanoparticles with extraordinary properties. CNTs were functionalized by various surfactants to prevent its agglomeration due to van-der-Waals forces. This dispersion was added to an immiscible solvent and CNTs were self assembled with the aid of electric field via dielectrophoresis between pre-fabricated inter-digitated electrodes on silicon substrates. A potential drop across the interface may provide sufficiently deep potential wells for self assembly at the interface.