• Astronomy Seminar: "Are All Galaxies the Same?... A Synchronized, Uniform Framework for Galaxy & Black Hole Evolution"

    DRL A6

    Charles Steinhardt (Caltech)

  • Condensed Matter Seminar: "Shaping Colloidal Assembly"


    Professor Greg van Anders, University of Michigan

    Advances in synthesis techniques have produced colloids and nanoparticles in a diverse array of shapes that can be assembled into bulk structures. That bulk structure is strongly affected by particle shape in idealized systems is widely established in the literature. However, this literature leaves open three key questions: (i) We know that shape affects structure, but how? (ii) Does shape continue to matter in experimental systems where other interactions are present? (iii) How do we tailor colloid shape for a target structure?
  • Dissertation Defense: "The Optical Properties of Spiky Gold Nanoshells"

    University of Pennsylvania Chemistry building Lynch auditorium

    Simon Hastings, UPenn

  • Astronomy Seminar: " Cosmic Rays, Solar Forcing and 20th Century Climate Change"

    DRL A6

    Nir J. Shaviv (Hebrew University of Jerusalem and IAS Princeton)

  • Condensed Matter Seminar: Optics at the Extreme


    Professor Nader Enghetta, University of Pennsylvania

    Recent development in condensed matter physics and nanoscience has made it possible to tailor materials with unusual parameters and characteristics.  In my group, we have been exploring light-matter interaction in metamaterials and metastructures with extreme parameters, such near-zero permittivity and near-zero permeability, and with extreme features such as very high phase velocity, very low energy velocity, extremely thin (one-atom-thick metasurfaces), subwavelength nonreciprocal vortexes, extreme anisotropy, giant nonlinearity in phase-change dynamics, “static optics”, nano

  • Astronomy Seminar: TBD

    DRL A6


  • Condensed Matter Seminar: "Building Colloidal Aggregates in Anisotropic Media"


    Professor Colin Denniston, Western Ontario University

    Colloids in a liquid crystal matrix exhibit very anisotropic interactions. Further, these interactions can be altered by both properties of the colloid and of the liquid crystal. This gives the potential for creating specific colloidal aggregates and crystals by manipulating the interactions between colloids using the colloidal shape, surface properties, and even dynamics. However, modelling these interacting colloids in a liquid crystal is very challenging.

  • Department Colloquium: TBD


    Adam Lidz, UPenn

  • Astronomy Seminar: TBD

    DRL A6

    Stijn Wuyts (MPE Garching)

  • Condensed Matter Seminar: “Making Cells with Active Micro-tubule Mixtures”


    Professor Jennifer Ross, UMass Amherst

    Biology utilizes energy to organize itself from the nanoscale to the macroscopic scale. We seek to determine the universal principles of organization from the molecular scale that gives rise to architecture on the cellular scale. We are specifically interested in the organization of the microtubule cytoskeleton, a rigid, yet versatile network in most cell types. Microtubules in the cell are organized by motor proteins and crosslinkers.