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Program Highlights

Manipulating Crystal Orientation in Nanopores

Research

The UMN MRSEC has demonstrated the control of nanocrystal orientation within nanoporous polymer monoliths prepared from ABC triblock terpolymers containing a robust A block (polystyrene), a hydrophilic B block [poly(dimethylacrylamide)]

(2009)

Magnetics Day - Magnetism in Technology

Education

MRSEC faculty members Paul Crowell, Chris Leighton, and Dan Dahlberg and their students guided 25 high school students through an exploration of magnetism and its applications to technology as part of the Institute of Technology Center for Education Programs (ITCEP) Exploring Careers in Science & Engineering summer camp. The day of activities included hands-on demos, a lunch with recent graduates working in industry, and an afternoon spent building motors, magnetic levitators, generators, and radios.

(2009)

Printed Organic FETs on Plastic

Research

In a collaboration with an industrial manufacturer of aerosol jet printers (Optomec, Inc.), Lodge, Frisbie, and their students have demonstrated successful low voltage operation of an array of ion-gel gated OFETs printed on flexible polyimide substrates. Every component of the OFETs was printed--the metal electrodes (gold colloidal ink), the semiconductor (poly(3-hexylthiophene), and the gate insulator (the new ion gel material).

(2008)

Understanding Magnetic "Exchange Pinning"

Research

Recently, IRG-3 students Jyo Saha, Mike Lund, and Mun Chan, working with postdoc Jeff Parker and IRG faculty Chris Leighton, Randy Victora, and Paul Crowell, have performed one of the most detailed studies of this exchange pinning in materials very similar to those used in hard disks. Most importantly, the experimental results were directly compared to realistic micromagnetic simulations.

(2008)

Electrical Detection of Spin Transport in Semiconductors

Research

In semiconductor spintronics, the spin of the electron carries information for both storage and data processing. To some extent, the electron spin can be viewed as a miniature bar magnet that interacts with a magnetic field inside the semiconductor. The orientation of the bar magnet acts as a "bit" of information.

(2007)

Ion Gel-Gated Polymer Thin Film Transistors

Research

Ion Gel-Gated Polymer Thin Film Transistors (IRG 2). A major goal of organic electronics is the development of new kinds of solution processable organic dielectric materials that can serve as gate insulators in organic thin film transistors (OTFTs).

(2007)

Probing Spin Density Waves

Research

Exchange bias as a probe of the incommensurate spin density wave in epitaxial Fe/Cr (001).

(2007)

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