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Highlights

Highlights

May 15, 2010
University of Maryland - College Park

Charge Transfer Across Oriented Molecular Interfaces

G. Dutton, W. Jin, S. Robey, J. E. Reutt-Robey
Molecular semiconductors are important materials for technology applications, such as solar cells. Current research focuses on how to organize molecules  at interfaces for more efficient energy conversion.  Maryland MRSEC researchers and NIST collaborators  recently showed how the arrangement of molecules at a molecular junction impacts energy
May 14, 2010
University of Pennsylvania

Spontaneous Buckling of Synthetic Gels with Depth-wise Crosslinking Gradient

Jason A. Burdick, Christopher Chen, Paul A. Janmey, Dennis E. Discher, and Shu Yang
Hydrogels undergo volume changes when immersed in water, the degree of which is determined by the network chemical composition and crosslinking.
May 14, 2010
University of Pennsylvania

Polarization Dependent Interactions at Pd-LiNbO3(0001) Interfaces.

M. Zhao, D.A. Bonnell, and J.M. Vohs
The dipole orientation in ferroelectrics, such as LiNbO3 and BaTiO3, can be controlled via application of an electric field and this can in turn affect surface properties.  In this project we have shown for both adsorbed organic molecules and metal atoms that adsorption energies and activation energies for surface reactions are a function of the dipole orientation.
May 14, 2010
University of Pennsylvania

One Protein Scaffold – Multiple Functions

M. M. Sheehan, S. E. Chobot, J. L. R. Anderson, G. R. Wiedman, C. C. Moser, D.A. Bonnell, B. M. Discher, and P. Leslie Dutton
We have designed and fabricated simple artificial protein scaffolds (we call them maquettes) that can transfer catalytic functions familiar in Nature into materials.  Our proteins, built just from four alpha helices, proved to be very simple and robust structural element for variety of functions.  To date, we have demonstrated that four-helical maquettes can
May 14, 2010
University of Pennsylvania

Self-assembly of Janus-dendrimers into Uniform Dendrimersomesand Other Complex Architectures

Percec, V., Wilson, D.A., Leowanawat, P., Wilson, C.J., Hughes, A.D., Kaucher, M.S., Hammer, D.A., Levine, D.H., Kim, A.J., Bates, F.S., Davis, K.P., Lodge, T.P., Klein, M.L., DeVane, R.H., Aquad, E., Rosen, B.M., Argintaru, A.O., Sienkowska, M.J., Rissanen, K., Nummelin, S. and Ropponen, J.
May 14, 2010
University of Pennsylvania

Patchy Particles by Self-Assembly

Christian, D.A., Tian, A., Ellenbroek, W.G., Levental, I., Rajagopal, K., Janmey, P.A., Liu, A.J., Baumgart, T., & Discher, D.E.
The Roman God Janus has two faces, one to look forward plus one to look back, and now serves as inspiration for many to make ‘Janus particles’ with two (or more) functionalities.  Indeed, the successful design and engineering of future technology requires materials with increasingly complex structures.
May 14, 2010
New York University

NYU MRSEC Highlight: Education and Outreach

Nearly 500 K-12 students from NYC schools visited NYU MRSEC laboratories for science demonstrations as part of the MRSEC Scientific Frontiers Program Developed class modules for 70 9th graders in the Urban Assembly Institute for Math and Science for Young Women, an all-girls school in Brooklyn for the underrepresented and underprivileged Science demonstrations, in Spanish, for more than 80 students at Don Pedro Albizu Campos elementary school, which primarily serves economically disadvantaged Hispanic student
May 14, 2010
New York University

NYU MRSEC Seed Highlight: A Photon Driven Nano-lander orbiting a Micro-moon

S. Arnold
 Whispering Gallery Mode Carousel: Forces exerted by an evanescent light wave at the surface of a spherical glass resonator draw microscopic colloidal particles toward the resonator surface  Intensity of the red-shifted light provides an exponentially sensitive probe of the particle-resonator separation; wavelength probes the strength of the light-matter interaction Virus-sized nanoparticle (a.k.a. “nano-lander”) in orbit about a glass microsphere (a.k.a. “micro-moon) under the influence of light that generates a radial tractor beam and a tangential photon wind
May 14, 2010
Georgia Institute of Technology

Ultrafast Relaxation of Hot Dirac Fermions in Epitaxial Graphene

Dong Sun, Zong-Kwei Wu, Charles Divin and Theodore Norris Center for Ultrafast Optical Science, University of Michigan Xuebin Li, Claire Berger, W. A. de Heer, and P. N. First, School of Physics, Georgia Institute of Technology
In high speed devices, electrons are accelerated to high energy by a high electric field; to understand device performance, it is important to know how those “hot” electrons relax by scattering with each other and with the environment (the graphene lattice and the SiC substrate).
May 14, 2010
Georgia Institute of Technology

Selective Epitaxial Graphene Growth on SiC via AIN Capping

F. Zaman*, M. Moseley, and J. D. Meindl, School of Electrical and Computer Engineering, Georgia Institute of Technology M. Rubio-Roy*, Y. Hu, C. Berger, and W. A. de Heer, School of Physics, Georgia Institute of Technology
AlN, deposited by molecular beam epitaxy and patterned by electron beam lithography, forms an effective capping layer for epitaxial graphene growth on C-face SiC.

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