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Highlights

Highlights

Feb 20, 2013
Northwestern University

A Range of Amorphous Structures

D.B. Buchholz, L. Zeng, M.J. Bedzyk and R.P.H. Chang
A range of amorphous structures for a single chemical-composition material (Indium Oxide) were observed; the structure dependent on the growth conditions. The carrier mobility and film (not carrier) density of the films was dependent on growth temperature. Films grown at 0°C and below are amorphous The film density decreased from 7.0 g/cm3 at 0°C to 5.4 g/cm3 at -100°C; the carrier mobility decrease from ~57 cm2/V•s to ~20 cm2/V•s over this same temperature range. The peak in mobility at 0°C adds to the body
Feb 20, 2013
Northwestern University

High Performance Carbon Nanotube Thin-Film Transistors Enabled by Hybrid Molecular Dielectrics

Vinod K. Sangwan, Rocio Ponce Ortiz, Justice M. P. Alaboson, Jonathan D. Emery, Michael J. Bedzyk, Lincoln J. Lauhon, Tobin J. Marks, and Mark C. Hersam
Over the past decade, semiconducting carbon nanotube (CNT) thin films have been recognized as contending materials for a wide range of applications in electronics, energy, and sensing. Nevertheless, CNT transistor performance suitable for real-world applications awaits understanding-based progress in the integration of independently pioneered device components. We achieve this here by integrating high-purity semiconducting CNT films with a customdesigned hybrid inorganic-organic gate dielectric.
Jan 30, 2013

Triangle Small Angle X-Ray Scattering Facility

In an effort, spearheaded by Triangle MRSEC, we received support through the NSF-MRI program for the purchase of Small Angle X-Ray Scattering (SAXS) instrumentation. The state-of-the-art instruments will serve the greater Research Triangle community for research and education, and will be housed in Duke's Shared Materials Instrumentation Facility (SMIF).
Jan 19, 2013
Northwestern University

X-ray Standing Wave Mapping of Graphene/SiC

J. Emery1, B. Detlefs2, H. Karmel1, V. Wheeler3, D.K. Gaskill3, M. Hersam1, J. Zegenhagen2, M. Bedzyk1 1Northwestern University Materials Research Science & Engineering Center 2European Synchrotron Radiation Facility, 3U.S. Naval Research Lab
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.  

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