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Highlights

Highlights

May 3, 2012
Next Generation Materials for Plasmonics and Organic Spintronics (2011)

Liquid Metal-Based Plasmonics

Ajay Nahata and Z. Valy Vardeny
Objective: To develop and characterize new plasmonic metamaterials in the terahertz (THz) spectral range. Approach: Explore unconventional materials that are typically not suitable for plasmonics applications at optical frequencies but exhibit reasonable conductivities at THz frequencies. Results and Significance: Liquid metals and well-developed microfluidic technology can be used successfully to create useful devices in a frequency range commonly referred to as the “gap in the electromagnetic spectrum.”
May 3, 2012
Next Generation Materials for Plasmonics and Organic Spintronics (2011)

Seed Project: The Dynamics of Organic Magneto-resistance (OMAR)

Andrey Rogachev and Tho Nguyen
Objective: To study the dynamics of magneto-resistance in organic diodes Approach: Measure electronic transport and magneto-transport of organic diodes as a function of frequency with an applied magnetic field using admittance spectroscopy
May 3, 2012
Next Generation Materials for Plasmonics and Organic Spintronics (2011)

JELL-O OPTICS ACTIVITY
  MRSEC outreach activities coordinate with Utah Core Curriculum Standards. These sixth-graders are studying the properties of light in their classroom. The Adelante program seeks to increase the expectation of university attendance and success among Hispanic students at Jackson Elementary. Participants:
May 2, 2012
The Georgia Tech Laboratory for New Electronic Materials (2008)

Twisting the height away

M. Kindermann and P. N. First, Georgia Tech, School of Physics
Multilayer graphene grown at Georgia Tech to heights of 1 to 10 nanometers contains non-graphitic “twists” between layers. Our recent theory describes the top layer as a single, effectively isolated graphene sheet. The remaining multilayer creates a periodically varying mass of the top-layer electrons: from positive, to zero, to negative(!). This makes intuition from single-layer graphene available for the analysis of twisted multilayer graphene, and predicts a regular pattern in the electronic structure that has been observed in experiments from our GT/NIST collaboration.
May 2, 2012
The Georgia Tech Laboratory for New Electronic Materials (2008)

Graphene Sensing of Biomolecules and Chemical Environment

J. Curtis, C. Berger, W. de Heer - Georgia Tech, School of Physics
    Fluidic chamber placed on top of   graphene sensor to exchange fluid   and hence protein or chemical   concentration during a measurement.
May 1, 2012

Nanodays at the North Carolina Museum of Life and Science

Stefan Zauscher, Education Director, Duke University
May 1, 2012

International Collaboration in Soft Matter Research and Training

Orlin D. Velev, Carol K. Hall, North Carolina State University S. Klapp, G. Findenegg, M. Gradzielski, Technical University, Berlin, Germany
The Triangle MRSEC enjoys a vibrant ongoing partnership with German researchers supported through an International Graduate Research and Training Grant (IGRTG) from the DFG. A significant component of this partnership is extended graduate student exchanges. An example of funded projects is the fundamental modeling of particle gelation by molecular dynamics simulations by Prof. Sabine Klapp (Technical Univ. - Berlin), Carol Hall and Orlin Velev.
May 1, 2012

Dynamic Electrostatic Lithography: Multiscale On-demand Patterning on Large Area Curved Surfaces

Q. Wang, M. Tahir, J. Zang, and X. Zhao, Duke University
Triangle MRSEC researchers have invented a new technology for the use of electrical voltages to dynamically generate various patterns on curved surfaces and over large areas, such as the surfaces of gloves. The applied voltages deform flat surfaces of rubbers into patterns of creases, lines, and craters. The patterns can be random, aligned or curved, and their feature sizes can be tuned from micrometers to millimeters. As the voltages are
Apr 30, 2012
Wisconsin Materials Research Science and Engineering Center

Professional Development Workshop for Teachers

Kermin Martinez-Hernandez, Sandy Sine, Troy Dassler
MRSEC postdoc, Dr. Kermin Martínez-Hernández; Visiting Scholar, Sandy Sine; and former MRSEC RET participant, Troy Dassler organized a workshop “Integrating cutting-edge nanotechnology into the inquiry-based learning experience.” This was part of the professional development workshop prepared for Middle Year’s Science Teachers and organized by CESA 6 Science Center: Meeting Demand for 21st Century Learning and UW-Madison Wisconsin Leads in Math and Science Initiative
Apr 30, 2012
Wisconsin Materials Research Science and Engineering Center

Liquid Crystal Nanodroplets, and the Balance Between Bulk and Interfacial Interactions

S. I. Hernández, J. A. Moreno-Razo, A. Ramírez-Hernández, E. Díaz-Herrera, J. P. Hernández-Ortiz and J. J. de Pablo
Molecular dynamics simulations of a coarse grain model are used to explore the morphology of thermotropic liquid crystal nanodroplets. The characteristic length of the droplets is such that different contributions to the energy, including interfacial and bulk-like terms, have comparable magnitudes. Depending on the relative strength of such contributions, a wide variety of mesophases can be identified. These range from a completely disordered isotropic phase at elevated temperatures, to ordered radial and smectic phases at low temperatures.

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