Regensburg 2010 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 42: Colloids and Complex Liquids I
CPP 42.5: Vortrag
Donnerstag, 25. März 2010, 12:15–12:30, H39
1, 2, and 3D Organization of Colloidal Nanoparticles — •Nicolas Pazos-Perez1, Alexandra Schweikart1, Adrea Fortini2, Matthias Schmidt2, Ramon Alvarez-Puebla3, Luis M. Liz-Marzan3, and Andreas Fery1 — 1Department of Physical Chemistry II, University of Bayreuth, Germany — 2Department of Theoretical Physics II, University of Bayreuth, Germany — 3Department of Physical Chemistry, University of Vigo, Spain
Colloidal crystal structures have been widely studied due to their extraordinary optical, electronic, magnetic... properties which are structure dependent. Thus, a big effort has been put in developing new methods which allow a fine control over the formation of colloidal crystals. This work presents a novel method to organize colloids into 1, 2 and 3D linear arrays in a macro scale range. This technique is based on the use of a pre-patterned polymeric stamp which provides a network of channels acting as confinement regions for the particles during the drying process. Additionally, Monte Carlo simulations were performed to study the obtained colloidal crystals morphologies. In both cases, simulation and experimental, we found a broad range of morphologies depending on the initial suspension concentration which differ from the bulk. Moreover, we demonstrate that such nanoparticulated arrays made of gold can be used for Surface Enhanced Raman Scattering (SERS) detection.