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Highlights

Highlights

First Observation of Hall Effect in Polymer Transistors
First Observation of Hall Effect in Polymer Transistors
Jan 17, 2013
University of Minnesota - Twin Cities

First Observation of Hall Effect in Polymer Transistors

C. Daniel Frisbie (IRG-2) & Chris Leighton (IRG-3)
Printed transistors employing both the bench-mark polymer semiconductor poly(3-hexyl-thiophene) and ultra-high capacitance ion gel gate insulators exhibit unusually large hole mobilities near 1 cm2/Vs at high charge densities (0.2 holes/ring).
Jan 16, 2013
University of Washington

SAPs: Self Assembled Peptides

Developed in GEMSEC, biocombinatorially selected solid binding peptides with short (7-15) amino acid (AA) sequences can bind to atomically flat materials via molecular recognition that leads to surface diffusion, clustering and long-range ordered assembly commensurate with the underlying crystallographic solid lattice.
Jan 16, 2013
University of Washington

Molecular Biomimetics

Molecular Biomimetics - Making materials one molecule at a time, via the Biology’s ways, allows an intricate control of nano- and microstructures that permit tailoring functional properties towards practical applications.
First All-Gas Phase Manufacture of a Nanocrystal Based Electronic Device
First All-Gas Phase Manufacture of a Nanocrystal Based Electronic Device
Jan 16, 2013
University of Minnesota - Twin Cities

First All-Gas Phase Manufacture of a Nanocrystal Based Electronic Device

Uwe Kortshagen (IRG-4), Russell Holmes (IRG-2)
Semiconductor nanocrystals hold great potential for the low-cost manufacture of electronic devices. 
(a) Schematic of 10-nm diameter Co/Cu/Co nanowire in a read sensor application. Despite being 4x smaller than the bulk scattering length for electrons, these nanowires exhibit almost bulk resistivities due to the very smooth surfaces of the aluminum oxide growth template. (b) Micrograph showing templates with smooth sidewalls and long range ordering (over in2).
(a) Schematic of 10-nm diameter Co/Cu/Co nanowire in a read sensor application. Despite being 4x smaller than the bulk scattering length for electrons, these nanowires exhibit almost bulk resistivities due to the very smooth surfaces of the aluminum oxide growth template. (b) Micrograph showing templates with smooth sidewalls and long range ordering (over in2).
Jan 16, 2013
University of Minnesota - Twin Cities

Low Resistivity Magnetic Nano-Sensors

Beth Stadler and Randy Victora (IRG-3)
As electronic devices shrink deep into the nano-scale, low-resistivities become essential.
Dec 18, 2012
University of Utah

MRSEC Takes the Lead in Coaching the Coaches in Materials Science Event

Utah MRSEC provided staff and faculty support for a Science Olympiad coaches’ clinic in November 2012, to help science teachers prepare to coach teams.   37 middle and high school science teachers, 22 of them female, from across the state dedicated their Saturday to attend the clinic to improve Science Olympiad team coaching skills.  
Dec 4, 2012
Georgia Institute of Technology

Fabrication on Patterned Silicon Carbide Produces Bandgap for Graphene-Based Electronics

Ed Conrad, Lead Researcher, Georgia Institute of Technology
  By fabricating graphene structures atop nanometer-scale “steps” etched into silicon carbide, researchers have for the first time created a substantial electronic bandgap in the material suitable for room-temperature electronics. Use of nanoscale topography to control the properties of graphene could facilitate fabrication of transistors and other devices, potentially opening the door for developing all-carbon integrated circuits.
Nov 28, 2012
Pennsylvania State University

Hidden Roto Symmetries in Nature Discovered

Venkatraman Gopalan (Penn State) and Daniel B. Litvin (Penn State)
MRSEC researchers have discovered a missing spatial operation in nature called rotation-reversal symmetry that reverses the sense of all static rotations in a crystal.  Certain minerals, organic crystals or metamaterials are composed of subunits that can exist in two states: clockwise or counter-clockwise rotated.  The symmetry of a crystal lattice helps determine the material’s properties, and certain properties can only exist in lattices with special symmetries.  In perovskite complex oxides, for example,  oxygen cages counter-rotate (see image); these crystals have twice as many
Nov 28, 2012
Pennsylvania State University

Nanoscale Rockets Powered by Ultrasound

Wei Wang (Penn State), Angelica Castro (ESPCI), Mauricio Hoyos (ESPCI), Thomas Mallouk (Penn State)
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
Nov 7, 2012
University of Utah

Photochemically Mapping the Near-Fields of Plasmonic Nanocrescents

Objective: Use plasmon-enhanced photochemical reactions to map the polarization-dependent near fields of optical antennas. Approach: Use the anisotropic nano-crescent structure and SU-8 photo-resist. SU-8 exposure accomplished through plasmon-enhanced multi-photon absorption by 800 nm light.  Approach: Use the anisotropic nano-crescent structure and SU-8 photo-resist. SU-8 exposure accomplished through plasmon-enhanced multi-photon absorption by 800 nm light. 

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