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Highlights

Developing a Solar Outreach Program for Haiti
Developing a Solar Outreach Program for Haiti
Jul 3, 2017
Yale University

Developing a Solar Outreach Program for Haiti

Andre Taylor, Yale University

A Solar Outreach Program for Haiti is comprised of an interdisciplinary team of students, professors, university partners, and non-governmental organizations whose goal is to design and build Integrated Energy Centers in energy scarce regions. This year, the program developed a business plan, located investors, and submitted several grant proposals.
Peak width plotted over the (111) peak center as obtained from fitting a simplified Cauchy function. The inset shows that the lowest overpotential is measured at intermediate peak width or strain.
Peak width plotted over the (111) peak center as obtained from fitting a simplified Cauchy function. The inset shows that the lowest overpotential is measured at intermediate peak width or strain.
Jul 3, 2017
Yale University

Combinatorial screening of metallic glass electrocatalysts for the oxygen reduction reaction

Andre Taylor and Jan Schroers, Yale University

Due to enormous challenges associated with theoretical modeling of multicomponent alloys, there are no reliable theoretical predictions available for their composition-dependent properties and structures. Taylor and Schroers have proposed to use combinatorial materials science to address this challenge. 
High school student Sophie Edelstein, who won the American Society of Metals (ASM) Award, with science fair judge Udo Schwarz. The ASM Award is given for the best project that “uses science to investigate materials interaction, materials response, and materials application to understand and solve problems of interest.”
High school student Sophie Edelstein, who won the American Society of Metals (ASM) Award, with science fair judge Udo Schwarz. The ASM Award is given for the best project that “uses science to investigate materials interaction, materials response, and materials application to understand and solve problems of interest.”
Jul 3, 2017
Yale University

New Haven Science Fair Participation

Schwarz, Yale University

CRISP continued its interactions with industrial companies that aim to commercialize broadly new and simpler approach for force microscopy measurements.  Separately, CRISP continued to train graduate students in research, writing, and presentation skills by providing the opportunity to attend a number of international conferences.
Perturbation of surface states due to broken local symmetry: Conducting surface states (blue curve, recorded at location III) disappear inside the pit (red curve, recorded at I)
Perturbation of surface states due to broken local symmetry: Conducting surface states (blue curve, recorded at location III) disappear inside the pit (red curve, recorded at I)
Jul 3, 2017
Yale University

Tailoring Topological Surface States

Schwarz, Altman, Walker, Ismail-Beigi, and Ahn, Yale University

Topological crystalline insulators feature conducting surface states for electrons whose existence is protected by crystal symmetry.  Scanning probe microscopy experiments on SnTe reveal that such metallic topological states can coexist next to semiconducting regions.
Reference 1: Champsaur, A. M.; Velian, A.; Paley, D. W.; Choi, B.; Roy, X.; Steigerwald, M. L.;  Nuckolls, C. Nano Lett. 2016, 16, 5273–5277
Reference 1: Champsaur, A. M.; Velian, A.; Paley, D. W.; Choi, B.; Roy, X.; Steigerwald, M. L.; Nuckolls, C. Nano Lett. 2016, 16, 5273–5277
Jun 29, 2017
Columbia University in the City of New York

Programming Dimensionality in Superatomic Materials

Colin Nuckolls, Columbia University Center for Precision Assembly of Superstratic and Superatomic Solids

Featured as one of the “Ten Ideas That Will Change the World” in Scientific American  in 2016, the discovery of assembling site-differentiated, atomically precise clusters into dimensionally controlled materials opens a new way to design and program a next generation of functional nanomaterials.
Rotating van der Waals Heterostructures
Rotating van der Waals Heterostructures
Jun 29, 2017
Columbia University in the City of New York

Rotating van der Waals Heterostructures

Cory Dean, Columbia University Center for Precision Assembly of Superstratic and Superatomic Solids

IRG1 of the Columbia MRSEC seeks to understand the behavior of van der Waals heterostructures created by assembly of atomically thin layered materials. One important question in this effort is how the relative orientation between the layers affects multiple properties.
Top Panel: Crystal Structure and normalized absorption, photoluminescence emission spectra of the proposed perovskite.
Bottom Panel: Left: Proposed mechanism for efficient inter-system crossing for the HT-Phase and LT-Phase. Right: Schematic outlining the exciton diffusion and TTET at the perovskite/rubrene interface.
Top Panel: Crystal Structure and normalized absorption, photoluminescence emission spectra of the proposed perovskite. Bottom Panel: Left: Proposed mechanism for efficient inter-system crossing for the HT-Phase and LT-Phase. Right: Schematic outlining the exciton diffusion and TTET at the perovskite/rubrene interface.
Jun 27, 2017
Duke University

Efficient Generation of Long-lived Triplet Excitons in 2D Hybrid Perovskites

Stefan Zauscher, Director, Research Triangle MRSEC

Most recent work on hybrid organic-inorganic perovskites is focused on solar cell applications. Hybrid perovskites, however, provide a flexible platform for materials design, with prospects for many different applications.
Chains of magnetic particles embedded in elastomers provide torque for directionally responsive soft robots. Image source: M. M. Schmauch, S. R. Mishra, B. A. Evans, O. D. Velev, J. B. Tracy, ACS Appl. Mater. Interfaces, 9, 11895  (2017).
Chains of magnetic particles embedded in elastomers provide torque for directionally responsive soft robots. Image source: M. M. Schmauch, S. R. Mishra, B. A. Evans, O. D. Velev, J. B. Tracy, ACS Appl. Mater. Interfaces, 9, 11895 (2017).
Jun 27, 2017
Duke University

Magnetic Particle Chains for Directionally Controlled Actuation of Soft Robots

Stefan Zauscher, Director, Research Triangle MRSEC, Duke University

Researchers at North Carolina State University and Elon University have developed soft robots based on magnetic field-directed self-assembly of magnetic particles into chains embedded in elastomer films.
Increasing the height of the annulus induces a transition from locally-turbulent to globally-coherent flows of a confined active isotropic fluid. The left and right half-plane of each annulus illustrate the instantaneous and time-averaged flow and vorticity map of the self-organized flows. The transition to coherent flows is an intrinsically 3D phenomenon that is controlled by the aspect ratio of the channel cross-section, and vanishes for channels that are either too shallow or too thin.
Increasing the height of the annulus induces a transition from locally-turbulent to globally-coherent flows of a confined active isotropic fluid. The left and right half-plane of each annulus illustrate the instantaneous and time-averaged flow and vorticity map of the self-organized flows. The transition to coherent flows is an intrinsically 3D phenomenon that is controlled by the aspect ratio of the channel cross-section, and vanishes for channels that are either too shallow or too thin.
Jun 21, 2017
Brandeis University

Coherent Flows in Confined 3D Active Isotropic Fluids

Seth Fraden and Zvonimir Dogic, Brandeis University

Navier-Stokes equations dictate that the conventional fluid flows only in response to an externally imposed gradient in stress or a body force. We developed a novel active fluid that is comprised of microtubules and energy consuming molecular motors kinesin.
Directing Actin Polymerization to Membranes
Directing Actin Polymerization to Membranes
Jun 21, 2017
Brandeis University

Directing Actin Polymerization to Membranes

C.F. Kelley, A.A. Rodal, Brandeis University

Biological membranes are deformed and shaped by proteins that assemble into higher-order scaffolds. These scaffolds target the force-generating polymerization of actin filaments to deform and shape the membrane.