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Program Highlights for year 2009

Manipulating Crystal Orientation in Nanopores

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)]

Magnetics Day - Magnetism in Technology

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.

Defect Density Limits Orientational Order in Shear-Aligned Block Copolymer Films

Self-assembling block copolymers provide a simple, efficient, and rapid way to generate nanoscale patterns over macroscopic areas:Â’  for example, an array of 20 nm dots covering a 100 mm silicon wafer.Â’  These dots can be "lined up" by applying shear to the block copolymer film [1], but the order is not perfect:Â’  dislocations (lines of dots that abruptly start or end) remain in the film.Â’