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Highlights

Highlights

Apr 22, 2013
Northwestern Materials Research Science and Engineering Center

Plasmonic Bowtie Nanolaser Arrays

Jae Yong Suh1, Chul Hoon Kim1,3, Wei Zhou2, Mark D. Huntington2 Dick T. Co1,3, Michael R. Wasielewski1,3, and Teri W. Odom1,2,3 1Department of Chemistry, 2Department of Materials Science and Engineering, and 3Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208, USA
Lasing from an electromagnetic hot spot supported by coupled metal nanoparticles (NPs) has been demonstrated for the first time. This new nanolaser architecture is based on three dimensional (3D) Au bowtie NPs supported by an organic gain material. The extreme field compression, and thus ultra-small mode volume, within the bowtie gap produced laser oscillations at the localized surface plasmon resonance gap mode of the 3D bowties. Transient absorption measurements confirmed ultrafast resonant energy transfer between the
Apr 18, 2013
MIT Center for Materials Science and Engineering (2014)

Harnessing In-Fiber Fluid Instabilities To Create Multimaterial Particles From Fibers

Ayman Abouraddy (UCF), Yoel Fink (MIT)
From drug delivery to catalysis to optoelectronics, the need for efficient fabrication pathways for particles over a wide range of sizes, from a variety of materials, and in many different structures is critical to functionality. Researchers in IRG-III have exploited the inherent scalability of fiber production and an in-fiber Plateau–Rayleigh capillary
Apr 18, 2013
MIT Center for Materials Science and Engineering (2014)

New Technique Provides Better Understanding of Problems with Lithium-Air Rechargeable Batteries

Yang Shao-Horn (MIT)
  The lack of fundamental understanding of the role of oxygen in non-water based electrolytes significantly hinders the development of rechargeable lithium-air batteries.  This IRG has developed a new X-ray photoelectron spectroscopy (XPS) technique that makes it possible to study the lithium/oxygen chemistry occurring during battery operation as a function of applied voltage and controlled oxygen pressure. 
Apr 5, 2013
Renewable Energy Materials Research Science and Engineering Center (2008)

The Case for Small Quantum Dots

H. Li, Z. Wu, and M. T. Lusk (Colorado School of Mines) Renewable Energy MRSEC, NSF DMR-0820518
Why are 1-2 nm silicon quantum dots ideal as solar materials?            
Apr 3, 2013
Renewable Energy Materials Research Science and Engineering Center (2008)

Education and Outreach in the Renewable Energy MRSEC

B. Moskal, J. Strong, T. Ohno, C. A. Stone (Colorado School of Mines), Renewable Energy REMRSEC, NSF DMR-0820518
Teacher Workshop: Eighteen elementary school teachers participated in summer workshop. Student impact of approximately 200 students.  Summer Camp: Instruction for a summer camp for forty-two dyslexic students. Intervention provided opportunity to experience success in science. 
Apr 3, 2013
Renewable Energy Materials Research Science and Engineering Center (2008)

Electrochromic Thin Film Transistors

C. Wolden, C-p. Li (Colorado School of Mines) R. Tennet, A. Dillon (National Renewable Energy Laboratory), Renewable Energy MRSEC, NSF DMR-0820518
We demonstrated an oxide-based TFT using electrochromic WO3 as the channel
Apr 3, 2013
Renewable Energy Materials Research Science and Engineering Center (2008)

Ultrafast Electron Transfer in Hydrogenated Nanocrystalline Si

M. R. Bergren, B. J. Simonds, R. Ahrenkiel, T. E. Furtak, R. T. Collins, P. C. Taylor (Colorado School of Mines) B. Yan, G. Yue (United Solar Ovonic) M.C. Beard (National Renewable Energy Laboratory), Renewable Energy MRSEC, NSF DMR-0820518
Apr 3, 2013
Next Generation Materials for Plasmonics and Organic Spintronics (2011)

Organic topological insulators in organometallic Lattices
Discovery: A class of 2D covalent organic framework made of triphenyl- metal compounds are found to be topological insulators exhibiting robust nontrivial topological edge states. Approach: Predictive First-principles band structure and band topology calculations.
Mar 15, 2013
UChicago Materials Research Center (2014)

Two views of how Information is transmitted through a material

Jelena Pesic, Joseph Zsolt Terdik, Xinliang Xu, Yi Tian, Alejandro Lopez, Stuart A. Rice, Aaron R. Dinner, and Norbert F. Scherer [University of Chicago]
In our system, a colloidal particle (upper left (a), red)  is trapped by optical tweezers (upper left (b)) as a surrounding colloidal suspension flows past.  Surprisingly, long range order develops in the particle density (lower left, dark bands are regions with over-representation of particles, sigma is the particle diameter).  A novel analysis of particle motions using a technique from computer science reveals the otherwise hidden flow patterns in the fluid surrounding the probe (right).
Mar 15, 2013
UChicago Materials Research Center (2014)

Self-Assembled Nano-Drums

Pongsakorn Kanjanaboos (University of Chicago), Xiao-Min Lin (Argonne), John E. Sader (University of Melbourne), Sara Rupich (University of Chicago), Heinrich M. Jaeger (University of Chicago), Jeffrey R. Guest (Argonne)
Using the expertise in nanoparticle synthesis and assembly built up in IRG 3, a MRSEC team comprised of members of the Jaeger and Talapin groups collaborated with Xiao-Min Lin and Jeffrey Guest at Argonne’s Center for Nanoscale Materials and John Sader from the University of Melbourne to develop the first completely self-assembled nano-mechanical resonator. It forms when a  nanoparticle monolayer drapes itself over a hole several microns in diameter to produce a 10nm thin, freestanding membrane that vibrates in the MHz range (transmission electron microscope images shown in left inset).

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