8th Liquid Matter Conference September 6-10, 2011 Wien, Austria ...

P7.34Thu 811:10-14:00Nanoparticle assembly by confinement in wrinkles:experiment and simulationsAndrea Fortini, 1 Alexandra Schweikart, 1 Alexander Wittemann, 2 MatthiasSchmidt, 1 and Andreas Fery 21 Theoretische Physik II, Physikalisches Institut, Universität Bayreuth, Universitätsstra 30,95447, Bayreuth, Germany2 Physikalische Chemie I, Universität Bayreuth, Bayreuth, GermanyWe created hierarchically ordered structures of nanoparticles on smooth planar hydrophilicsubstrates by drying colloidal dispersions in confinement under macroscopic stamps with microscopicallywrinkled surfaces [1]. Experiments were carried out with model nano- particlesuspensions that possess high colloidal stability and mono- dispersity. The structures ranged fromsingle parallel lines of particles to arrays of dense prismatic ridges. The type of observed structurecould be controlled by the particle concentration in the initial dispersion. Confinement betweentwo crossed stamps led to interconnected meshes of particles. The precise morphology could bepredicted in all cases by Monte Carlo computer simulations of confined hard spheres. Our findingsopen up possibilities for versatile nanoparticle assembly on surfaces.[1] Schweikart et al. Soft Matter (2010) vol. 6 pp. 586034