(420aw) Equilibrium and Non-Equilibrium Self-Assembly of Nanostructured Materials
Self-assembly of nanoscopic components into higher-order architectures defines the forefront of fundamental nanoscience research and is important for the development of new materials with potential applications in optoelectronics, high-density data storage, catalysis, and biological sensing. In my talk, I will discuss how the peculiar nature of electrostatic and photoinduced dipole-dipole forces acting between nanoscale components can mediate their self-assembly into various superstructures and materials. I will show how the interactions underlying self-assembly can be studied and understood in quantitative detail, and how they can be tailored to synthesize unusual higher-order architectures: ionic-like crystals of nanoparticles, crystalline aggregates that can be assembled and disassembled by light, as well as extremely durable and yet very flexible metallic structures. Since these materials display a range of novel optical, electrical and mechanical properties, the discussion of experimental results will be accompanied by theoretical analyses combining elements of thermodynamics, statistical mechanics, electrodynamics and elasticity.
1. A.M. Kalsin, M. Fialkowski, M. Paszewski, S.K. Smoukov, K. J.M. Bishop & B.A. Grzybowski Electrostatic self-assembly of binary nanoparticle crystals with a diamond lattice, Science, 312, 420 (2006).
2. R. Klajn, K.J.M. Bishop, M. Fialkowski, M. Paszewski, C.J. Campbell, T.P. Gray & B.A. Grzybowski Plastic and moldable metals by self-assembly of sticky nanoparticle aggregates, Science 316, 261-264 (2007).
3. H.Nakanishi, K.J.M. Bishop, B.Kowalczyk, E.A. Weiss, A. Nitzan, K.V. Tretiakov, M.M. Apodaca, R. Klajn, J.F. Stoddart & B.A. Grzybowski Photoconductance and inverse photoconductance in films of functionalized metal nanoparticles Nature 460, 371-375 (2009).