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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