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Highlights

Highlights

May 26, 2008
UMD Materials Research Science and Engineering Center (2005)

Thinking Small: Nanoscale Informal Science Education (NISE) Activities

Alex Prasertchoung, Education Coordinator, and Donna Hammer, MRSEC Associate Director and Education Director
The University of Maryland (UMD) MRSEC joined the NISE Network in the nation-wide effort to bring nanoscience to communities across the country during the week of March 29 - April 6, 2008.
May 23, 2008
UMD Materials Research Science and Engineering Center (2005)

Noise at the Nanoscale

Chenggang Tao, A. Bondarchuk, W.G. Cullen P. Rous, T. Bole and E.D. Williams
May 23, 2008
UMD Materials Research Science and Engineering Center (2005)

Electromagnons in Multiferroics

A B Sushkov, M Mostovoy, R Valdes Aguilar, S-W Cheong and H D Drew
The coupling of the magnetic and ferroelectric order in multiferroics produces new excitations of mixed magnetic (magnons) and lattice (phonons) character ; electro-magnons. The investigation of these novel excitations as has revealed that they are activated only through symmetric Heisenberg exchange, even in systems in which the static polarization arises from the relativistic antisymmetric exchange.
May 23, 2008
UMD Materials Research Science and Engineering Center (2005)

Giant Magneto-Elastic Coupling in hexagonal Y(Lu)MnO3

S. Lee, A. Pirogov, M. Kang, K. H. Jang, M. M. Yonemura, T. Kamiyama, S.-W. Cheong, F. Gozzo, N. Shin, H. Kimura, Y. Noda and J.-G. Park
Multiferroic Y(Lu)MnO3 undergoes an isostructural transition at the magnetic Neel transition, producing giant atomic displacement for every atom in the unit cell. It appears that this happens without either soft-mode degrees of freedom or orbital degrees of freedom. This extremely large magneto-elastic coupling is unprecedented - larger by two orders of magnitude than in any magnetic materials.
May 23, 2008
UMD Materials Research Science and Engineering Center (2005)

Coaxial Nanostructures for Energy Storage

P. Banerjee, R. Liu, S.B. Lee, G.W. Rubloff
Electrochemical oxidation of aluminum produces very regular arrays of nanopores. UMD-MRSEC researchers are mastering (1) nanopore synthesis and (2) deposition of coaxial multilayers of ultrathin films into the nanopores to create a new generation of devices for storing electrical energy that function as supercapacitors and batteries. These feature simultaneously higher power and higher energy storage than the best of today's devices, meeting the growing need for storing energy derived from new but intermittent sources (solar, wind, etc.).
May 23, 2008
UMD Materials Research Science and Engineering Center (2005)

Electrons in Graphene can Travel 100 Times Faster than in Silicon

J. H. Chen, C. Jang, S. Xiao, M. Ishigami, M. S. Fuhrer
Mobility measures how fast electrons travel in a material when an electric field (i.e.
May 19, 2008
Penn State Center for Nanoscale Science (2020)

Tunable refraction

X. Wang, D.-H. Kwon, D. Werner, and I.-C. Khoo (with collaborators A. Kildishev and V. Shalaev)
Materials with a negative refractive index can form super-resolution planar lenses, sub-surface cameras or compact resonators which are otherwise impossible to realize. MRSEC researchers have predicted for the first time a tunable negative-index material with low loss, using liquid crystals, whose operating wavelength can be changed by controlling the liquid crystal orientation. Download
May 19, 2008
Penn State Center for Nanoscale Science (2020)

Chemotaxis

Y. Hong, N. M. K. Blackman, N. D. Kopp, A. Sen, and D. Velegol
Bimetallic gold/platinum nanorod motors spontaneously move towards hydrogen peroxide fuel when they are placed in a fuel gradient, the first time this behavior has been seen outside of the biological world. Download
May 19, 2008
CSPIN — Center for Semiconductor Physics in Nanostructures (2005)

Electronic Device Applications for Narrow Gap Semiconductors
Semiconductors with narrow energy gaps have electronic properties, including a high mobility and strong spin-orbit coupling, that are advantageous for electronic device applications. The switching speed of a field-effect transistor and the sensitivity of a geometrical magnetoresistor are improved by a high carrier mobility. In addition to these traditional devices, we are studying devices that take advantage of quantum-mechanical or spin-orbit effects.
May 19, 2008
CSPIN — Center for Semiconductor Physics in Nanostructures (2005)

SeeS: Sooner Elementary Science and Engineering Club & Science Zone 2008
"I never knew I was so good in science. I'm going to be a research scientist when I grow up!"

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