Highlights
Aug 25, 2010
Brandeis University
The MRSEC Microfluidics
Seth Fraden, Dongshin Kim
During the academic year, Fall09 - Spring10, Dr. Kim,
the facility director ,designed, built and tested devices for a number of MRSEC
and outside users.
Aug 24, 2010
Brandeis University
Self-Limited Self-Assembly of Chiral Subunits
A simple
computational model demonstrates the assembly of self-limited filamentous
bundles. The images are taken from dynamic Monte Carlo simulations in which "chiral"
subunits ( with a preference to form twisted arrays of one "handedness")
spontaneously assemble under different interaction strengths and degrees of chirality.
Aug 24, 2010
Brandeis University
Active Emulsion droplet arrays
Irv Epstein, Seth Fraden, Bing Xu
Stabilized
emulsions containing the oscillating Belousov - Zhabotinsky chemical reaction (BZ) show interesting dynamics. Each drop acts as an independent chemical clock.
However, they chemically communicate and exhibit collective behavior. In (a)
six BZ drops are contained in a
capillary tube. The white bars
are light, which set the oscillators in the reduced state. Drops 1 & 6 are
always exposed to light, setting the boundary conditions. Drops 3 & 4 are
Aug 23, 2010
Massachusetts Institute of Technology
How the weak becomes strong: spider silk reveals a paradox of super-strength
Markus Buehler (MIT)
Since its development in China thousands of years ago, silk from
silkworms, spiders and other insects has been used for high-end, luxury
fabrics as well as for parachutes and medical sutures. Now, MRSEC
supported researchers are untangling some of its most closely guarded
secrets, and explaining why silk is so strong, a question that has
remained unresolved. Buehler and co-workers of the MIT MRSEC IRG-II have
Aug 18, 2010
University of Oklahoma
Aharonov-Bohm Effect in Neutral Excitons
Greg Salamo, Physics, University of Arkansas
We have made the first experimental observation of the Aharonov-Bohm effect in neutral excitons. In classical mechanics the motion of an electrical charged particle is only affected if the particle enters a region of space with a magnetic or electric field.
Aug 16, 2010
University of Oklahoma
Portable SEM for K-12 Schools
Greg Salamo, UA; Matthew Johnson, OU
Expanding outreach with portable SEM for K-12 math/science. Last year MRSEC graduate students at the University of Arkansas brought cutting edge microscopy to local middle-school students and allow them to explore the world of nanoscience in real-time. This year our focus expanded to regional high-school students. The microscope is a portable scanning electron microscope (SEM). The SEM allows the students to explore the world of the “nano”.
Aug 13, 2010
University of Washington
Biofabrication of ZnS-binding immuno-quantum dots
A designer protein combining ZnS mineralizing activity with IgG adaptor
capability was built and used for easy and rapid aqueous synthesis of
immuno-QDs. The particles consist of a ≈ 4 nm ZnS wurtzite core, can be
derivatized with a wide variety of unmodified antibodies, and have
ultrasmall (14 nm) diameters.
Jul 12, 2010
University of Colorado at Boulder
Undergraduate Partnership with Cal Poly Pomona
The LCMRCconducts collaborative research with Cal Poly Pomona, a Hispanic
Serving Institution. Cal Poly Chemistry Juniors work in the Department’s
research laboratory for two quarters during the AY, then continue their
research full time at the LCMRC labs in Boulder during the summer. Cal Poly
students are able able to take advantage of
the dynamic atmosphere and interdisciplinary expertise of the LCMRC and use
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