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Highlights

Highlights

Oct 10, 2013
Wisconsin Materials Research Science and Engineering Center

Monolayers of Organic Semiconductors with High Hole Mobility

E. Mannebach, J. W. Spalenka, P. S. Johnson, Z. Cai, F. J. Himpsel, and P. G. Evans
The electronic properties of thin films with thicknesses of only a single molecular layer have in the past typically been far worse than thicker films of the same material.
Oct 9, 2013
Wisconsin Materials Research Science and Engineering Center

Helping the Public See 10,000x Better
During the summer of 2012, Hitachi Inc. loaned the UW-MRSEC education group a table-top scanning electron microscope for use during education and outreach activities. Thirteen fifth-graders synthesized ZnO nanoparticles then used the SEM to examine their particles. The education group sent a summary of the activity including photographs which Hitachi used for an article about the SEM which they published in the Japanese version of the Wall Street Journal.
Oct 9, 2013
Wisconsin Materials Research Science and Engineering Center

Education Group Disseminates Education Material to Russia

Anne Lynn Gillian-Daniel, Benjamin Taylor University of Madison-Wisconsin
NanoVenture is a board game developed by the UW-MRSEC Interdisciplinary Education Group (IEG) to teach audiences about the connections between Nanotechnology and society. In 2012, with permission from the UW-MRSEC IEG, the Education Center Uchastie translated the game into Russian and they will be distributing it to schools in Russia as part of the School League of RUSNANO project.
Oct 9, 2013
Wisconsin Materials Research Science and Engineering Center

Determination of Bi Concentration at the Atomic-level in GaAs(1-y)Bi(y)

Susan E. Babcock*, April S. Brown^, and Thomas F. Kuech*, *University of Wisconsin-Madison, ^Duke University
The nanoscale structural and compositional features of molecular beam epitaxy (MBE)-grown GaAs1−yBiy films have been successfully characterized with unprecedented precision by researchers of the Wisconsin MRSEC using high-resolution x-ray diffractometry and high-resolution high-angle annular dark field (HAADF or “Z-contrast”) imaging in a scanning transmission electron microscope. The spots on the left side of the paired bright spots in the image below are identified as the Ga
Oct 9, 2013
Wisconsin Materials Research Science and Engineering Center

Colloid-in-Liquid Crystal Gels Formed via Spinodal Decomposition

Emre Bukusoglu*, Juan de Pablo^, and Nicholas L. Abbott*, *University of Wisconsin - Madison, ^University of Chicago
Colloidal gels are formed by aggregation of particles into a percolating network in liquid media.  Although colloidal gels exhibit self-supporting, solid-like properties that underlie the design of a wide range of materials, how this class of soft solids forms is not yet fully understood.  In particular, the relative importance of thermodynamic and dynamic (non-equilibrium) phenomena underlying
Oct 9, 2013
Wisconsin Materials Research Science and Engineering Center

Membrane Strain in Bacteria Influences the Organization and Function of the Recombination Repair Enzyme RecA

M. Rajendram, H. Tuson, V. Smeianov, K. Ngo, M. M. Cox, D. Weibel, University of Wisconsin - Madison
Researchers in IRG3 of the Wisconsin MRSEC are studying bacteria to understand principles by which nature designs materials to achieve dynamic spatial targeting of molecules. Recently, the researchers have discovered that the spatial organization of phospholipids at the curved regions of bacterial cytoplasmic membranes has an important
Oct 3, 2013
Center for Emergent Materials (2014)

OSU Researchers Offer Explanation for Strange Magnetic Behavior at Semiconductor Interfaces

S. Banerjee, Ohio State University O. Erten, Ohio State University M. Randeria, Ohio State University
The electronic properties of the polar interfaces between insulating oxides has been intensely investigated in recent years. An exciting new development is the observation of robust magnetism at the interface of two non-magnetic materials, LaAlO3 (LAO) and SrTiO3 (STO).
Sep 11, 2013
Center for Emergent Materials (2014)

New imaging tool for spin scientists and engineers

V. P. Bhallamudi (Dept of Physics, Ohio State), C. S. Wolfe (Dept of Physics, Ohio State), V. P. Amin (Dept. of Physics & Astronomy, Texas A&M), D. E. Labanowski (Dept of Physics, Ohio State), A. J. Berger (Dept of Physics, Ohio State), D. Stroud (Dept of Physics, Ohio State), J. Sinova (Dept. of Physics & Astronomy, Texas A&M), and P. C. Hammel (Dept of Physics, Ohio State)
A new technique for imaging spin properties at the nanoscale, Scanned Spin‐Precession Microscopy, works by incorporating a scannable micromagnetic tip in conjunction with any of a variety of established spin detection tools—electrical or optical, and improves upon their limited or non‐existent imaging capabilities. The magnetic field gradient from the probe directly selects spins from certain regions of the sample for study.
Sep 3, 2013
Princeton Center for Complex Materials (2014)

Latin School for Boys Visits PCCM

Daniel Steinberg, N. P. Ong (Princeton University)
On March 13, 2013, students from Philadelphia's Latin School visited the Princeton Center for Complex Materials. The 9th and 10th graders came to PCCM from the largely African American all boys charter school in Philadelphia. Their teacher, Christine Galib, a Princeton University alum, has been teaching her students about nanotechnology. She saw a talk by PCCM's Professor Michael McAlpine and wanted to inspire her students about nanomaterials. The students toured the Imaging and
Sep 3, 2013
Princeton Center for Complex Materials (2014)

Microfluidics for block polymer shells

H.A. Stone, R.A. Register and Janine Nunes (Princeton University)
We utilized microfluidic methods to investigate the role of geometric structures, e.g. thin spherical block copolymer shells, in the microphase separation in block copolymer thin films. The shells are comprised of the triblock copolymer styrene-isoprene-styrene (SIS). For air-in-oil-in-water emulsions, microfluidic devices with two consecutive flow-focusing junctions were used to generate air bubble-containing droplets of a solution of the SIS triblock

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