NEUTRON SPIN ECHO FOR THE NATION

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A world-class Neutron Spin Echo Spectrometer for the Nation: UD-NIST -UMD Consortium NSF Proposal 1935956

This award from the Midscale Research Instrumentation -1 program supports the acquisition, implementation and commissioning of a world-class neutron spin echo spectrometer for the nation. The University of Delaware’s Center for Neutron Science working together with the National Institute of Standards and Technology’s Center for Neutron Research and the University of Maryland are creating a world-class neutron spin echo spectrometer to strengthen U.S. research infrastructure with substantial benefit to the soft matter, biological sciences, and engineering research communities. (continue reading…)

A NEW SCIENTIFIC INSTRUMENT FOR THE NATION

The University of Delaware will lead the development of a world-class neutron spin echo spectrometer, which will be installed at the National Institute of Standards and Technology’s Center for Neutron Research, shown here.

UD tapped to lead development of world-class neutron research instrument

The University of Delaware has been tapped to lead the development of a world-class neutron spin echo spectrometer for the United States. This scientific instrument will advance U.S. research on countless materials important to humanity, from new medicines to more powerful batteries. UD’s Norman Wagner, the Unidel Robert L. Pigford Chair in Chemical and Biomolecular Engineering and director of the Center for Neutron Science, will lead the project, which is funded by an $11.8 million grant from the National Science Foundation. “This groundbreaking research project brings distinction to the entire University of Delaware, and we are excited to see what the future will bring,” said UD President Dennis Assanis. “On behalf of our entire University, I want to offer heartfelt congratulations to Dr. Wagner and his research group on this remarkable accomplishment.” It is among the first awards in NSF’s Mid-Scale Research Infrastructure program, announced Sept. 17.

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Senator Coons tweets Congrats to UD CNS

Center for Neutron Science team wins $11M grant from NSF

Senator Chris Coons congratulates University of Delaware’s Norm Wagner and Center for Neutron Science Team

Senator Chris Coons: “Congrats to @UDelaware’s Norm Wagner & his Center for Neutron Science team for winning an $11M grant from @NSF. This funding will help American scientists, NIST, UD, UMD & partners close an important gap by supporting both research & the best neutron measurement instrumentation.”

View Senator Chris Coons Tweet

CNS/NIST Seminar – Tuesday, August 20, 2019 @3:00 p.m. in 366 Colburn Lab

Matsarskaia Facebook Ad
Olga Matsarskaia, Institut Laue-Langevin, Grenoble, France “How Multivalent Cations Tune the Phase Behaviour of Proteins: Insights from Scattering Experiments”

Dr. Matsarskaia completed her Ph.D. studies in December 2018 in Frank Schreiber’s group at the University of Tübingen, Germany. Her research focused on the influence that multivalent cations have on the thermodynamics of proteins in solution. Her main methods involved various X-ray and neutron scattering techniques. Currently, she is a post-doctoral fellow in Bela Farago’s neutron spectroscopy group at the Institut Laue-Langevin in Grenoble, France, and focuses on the dynamics of proteins in crowded environments using neutron backscattering and complementary methods. View Abstract

JACS Publication

Understanding Gas Storage in Cuboctahedral Porous Coordination Cages

Bloch Group recently published a paper in JACS where neutron diffraction was used to study methane binding sites in porous materials

Gregory R. Lorzing, Eric J. Gosselin, Benjamin A. Trump, Arthur H. P. York, Arni Sturluson, Casey A. Rowland, Glenn P. A. Yap, Craig M. Brown, Cory M. Simon, Eric D. Bloch*

Porous molecular solids are promising materials for gas storage and gas separation applications. However, given the relative dearth of structural information concerning these materials, additional studies are vital for further understanding their properties and developing design parameters for their optimization. Here, we examine a series of isostructural cuboctahedral, paddlewheel-based coordination cages, M24(tBu-bdc)24 (M = Cr, Mo, Ru; tBu-bdc2– = 5-tert-butylisophthalate), for high-pressure methane storage. As the decrease in crystallinity upon activation of these porous molecular materials precludes diffraction studies, we turn to a related class of pillared coordination cage-based metal–organic frameworks, M24(Me-bdc)24(dabco)6 (M = Fe, Co; Me-bdc2– = 5-methylisophthalate; dabco = 1,4-diazabicyclo[2.2.2]octane) for neutron diffraction studies. The five porous materials display BET surface areas from 1057–1937 m2/g and total methane uptake capacities of up to 143 cm3(STP)/cm3. Both the porous cages and cage-based frameworks display methane adsorption enthalpies of −15 to −22 kJ/mol. Also supported by molecular modeling, neutron diffraction studies indicate that the triangular windows of the cage are favorable methane adsorption sites with CD4–arene interactions between 3.7 and 4.1 Å. At both low and high loadings, two additional methane adsorption sites on the exterior surface of the cage are apparent for a total of 56 adsorption sites per cage. These results show that M24L24 cages are competent gas storage materials and further adsorption sites may be optimized by judicious ligand functionalization to control extracage pore space.

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Improved EVA Suit MMOD

Protection Using STF-Armor™ and Self-Healing Polymers

University of Delaware/NASA Johnson Space Center, Human Exploration & Operations, Space Technology Mission Directorates, International Space Station

The low-Earth orbit (LEO) environment exposes astronauts performing extravehicular activity (EVA) to potential threats from micrometeoroid and orbital debris (MMOD). Moreover, impacts of MMOD with the International Space Station (ISS) can cause craters along hand railings which can pose a cutting threat to astronauts during EVA missions. In this research, we are developing advanced nanocomposite textiles based on STF-Armor™ to improve astronaut survivability. The aim of these investigations is the incorporation of the STF technology to improve the protection of astronaut EPGs capable of withstanding extended exposure to the space environment during multiple EVAs. A hypodermic needle puncture test is used to simulate the threat posed by damaged surfaces. LEO-compatible-STF-treated spacesuit layups are two times more resistant to puncture than the current TMG, without sacrificing weight and thickness of the spacesuit. The longevity and robustness of LEO-STF-treated spacesuit materials, successfully launched with the Materials International Space Station Experiments, MISSE-9, aboard SpaceX-14 resupply mission on April 2, 2018, will be tested over the next year. The samples will be exposed to extreme levels of solar and charged-particle radiation, atomic oxygen, hard vacuum, and temperature extremes. The gathered data including monthly high-resolution images of the samples, temperature, particulate contamination and UV intensity data can be used to evaluate the proposed LEO-STF spacesuit materials for possible use in planetary exploration beyond Earth such as NASA’s mission to Mars. Industry Collaboration: STF Technologies, LLC and Alpha Space Test and Research Alliance, LLC

View NASA EPSCoR ISS Stimuli 2018-19

Highly Cited Researchers

Cathy Wu, Craig Brown and Anderson Janotti

Cathy Wu, Craig Brown and Anderson Janotti make list of top influencers

Engineers at the University of Delaware do research that garners attention from scientists and engineers around the world, and three faculty members in the College of Engineering were recently named to the Clarivate Analytics list of Highly Cited Researchers for 2018. This list identifies scholars whose publications are in the top 1% for citations by other researchers via Web of Science, a scientific citation indexing service. Researchers can be cited for top performance in their field or for Cross-Field impact, a new category this year. Read on for more about UD engineering’s highly cited academics.

Craig M. Brown is a staff chemist at the National Institute of Standards and Technology (NIST) center for Neutron Research and an adjunct professor through UD’s Center for Neutron Science, which was founded in 2007. Under a cooperative agreement with NIST, UD’s Center for Neutron Science advances the field of neutron scattering by developing new techniques, applying these techniques to new applications, and training the next generation of neutron scientists. Brown, who studies the structure and dynamics of novel materials, made the 2018 Highly Cited Researchers list in the Cross-Field category. Among his most cited works are papers on molecular adsorption for energy efficient industrial separations, and hydrogen storage in materials, which hold promise in applications for cleaner energy and automotive technology. Brown has published more than 175 peer-reviewed papers, which have garnered more than 12,000 citations. His work has an h-index of 50, and an i10-index of 144 based on Google Scholar.

View College of Engineering News article

Journal of the American Chemical Society

Methane Storage in Paddlewheel-Based Porous Coordination Cages

Casey A. Rowland, Gregory R. Lorzing, Eric J. Gosselin, Benjamin A. Trump, Glenn P. A. Yap, Craig M. Brown, and Eric D. Bloch
J. Am. Chem. Soc.
DOI: 10.1021/jacs.8b05780
Publication Date (Web): August 18, 2018
Copyright © 2018 American Chemical Society

Although gas adsorption properties of extended three-dimensional metal-organic materials have been widely studied, they remain relatively unexplored in porous molecular systems. This is particularly the case for porous coordination cages for which surface areas are typically not reported. Herein, we report the synthesis, characterization, activation, and gas adsorption properties of a family of carbazole-based cages. The chromium analog displays a coordination cage record BET surface area of 1235 m2/g. With precise synthesis and activation procedures, two previously reported cages similarly display high surface areas. The materials exhibit high methane adsorption capacities at 65 bar with the chromium(II) cage displaying CH4 capacities of 194 cm3/g and 148 cm3/cm3. This high uptake is a result of optimal pore design, which was confirmed via powder neutron diffraction experiments.

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