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  Giant spin-Seebeck effect could provide power from waste heat

In July, 2012, the UW-MRSEC hosted graduate students from the University of Puerto Rico Mayaguez. While in Madison, Wisconsin the students performed their Science on Wheels (Ciencias en Ruedas) show at the Wisconsin Institutes for Discovery on the UW-Madison campus. The show teaches students about chemistry and physics using loud, exciting, highly visual content including explosions, water cannons, liquid nitrogen balloons and more.

Assembling microscopic particles into macroscopic structures can open new pathways for producing complex materials that cannot be produced by lithographic methods. Although several methods for assembling colloidal particles exist, including controlled drying, ionic interactions, and dipolar interactions, a general pathway for producing a wider variety of structures remains a fundamental challenge.  Here a versatile colloidal assembly system is demonstrated in which the design rules can be tuned to yield over 20 different

Utah MRSEC sponsored 10 undergrads to work with faculty and graduate student mentors in their labs for a 9-week research program. Research opportunities for Utah MRSEC REU students are of an interdisciplinary focus on topics such as plasmonic metamaterials, and spin effects in organic LEDs & solar cells. Researchers and selected students are from fields such as materials science, electrical engineering, physics, chemistry and applied math.  

Objective: Develop and characterize OLEDs based on spin-aligned carrier injection of which electro-luminescence (EL) is controlled by magnetic field. Approach: Use ferromagnetic cathode and anode that work as bipolar spin- valve injecting both electrons and holes into a deuterated π-conjugated polymer.

A new instrument allows the first imaging of the movement of electrons in artificial materials

David B. Torrance, Baiqan Zhang, Tien Hoang and Phillip N. First School of Physics, Georgia Tech

Hiroaki Yoshida, Jeffrey Gaulding, Apoorva Kalasuramath, Andrés J. García, L. Andrew Lyon School of Chemistry and Biochemistry, Petit Institute for Bioengineering and Bioscience, Woodruff School of Mechanical Engineering, Georgia Institute of Technology

Jordan Greenlee, James Compagnoni, Cole Petersburg, Faisal Alamgir, W. Alan Doolittle 1) Department of Electrical and Computer Engineering, Georgia Tech 2) Department of Materials Science and Engineering, Georgia Tech

MRSEC researchers working in an international collaboration with French scientists at ESPCI (Paris Tech) have discovered that rocket-shaped metallic micro-rods can be propelled through fluids using ultrasound, with fast translation towards the tapered end and rapid rotation & assembly of rods into circular chains that move like conveyer belts.  Since most ways to make micro-objects move autonomously in fluids are incompatible with biological fluids, this bio-friendly ultrasound technique may be a first step towards the design of powered micro-robots that can perform microsurgery or deliver