Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 68: Polymeric biomolecular films
O 68.3: Vortrag
Donnerstag, 17. März 2011, 11:45–12:00, WIL B122
Contact energy landscapes by means of mobile nanoparticles — •Ute Queitsch1, Anja Blüher1, Alfred Hucht2, Berndt Rellinghaus3, Ludwig Schultz3, and Michael Mertig1 — 1TU Dresden, Phys. Chem. Measurement & Sensor Technol, D-01062 Dresden, Germany — 2Univ. Duisburg-Essen, Fac. Phys, D-47048, Duisburg, Germany — 3IFW Dresden, P.O. Box 270116 D-01171, Germany
The key to successful applications of nanoparticles is their organization at the nanoscale, i.e. the creation of defined nanostructures of particles with controlled morphology in highly ordered arrays. Gas phase preparation has proven to allow for the preparation of nanoparticles of various materials with narrow size distribution. A regular arrangement of the particles can be accomplished by self organization on bacterial S-layer templates [1]. There the main driving force to achieve particle ordering, is the reduction of the surface free energy of the particles by maximizing the contact area between particles and the S-layer surface [2]. The effective contact energy can be quantitatively determined by simulations on the density-dependent particle distribution on the S-layer. Therefore a simple model on the particle diffusion on S-layers including the deposition, diffusion and agglomeration of the particles within the periodic surface potential of the protein template is developed. By means of the presented method for the first time a quantification of the templating effect of S-layer templates is realized.
[1] U.Queitsch et al., Appl. Phys. Lett. 90, 113114 (2007)
[2] U.Queitsch et al., J. Phys. Chem. C., 113, 24, 10471 (2009)