Craig M. Brown
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View article: Temperature-Regulated Gating Enables Gas Separations in Ultramicroporous Aluminum Formate, ALF
Temperature-Regulated Gating Enables Gas Separations in Ultramicroporous Aluminum Formate, ALF Open
Physisorption is a reversible exothermic phenomenon where molecular kinetic energy is limited and interactions between guest molecules and materials are favored at low temperatures. However, in certain ultramicroporous materials, physisorp…
View article: Evolution from topological Dirac metal to flat-band-induced antiferromagnet in layered KxNi4S2 (0 ≤ x ≤ 1)
Evolution from topological Dirac metal to flat-band-induced antiferromagnet in layered KxNi4S2 (0 ≤ x ≤ 1) Open
View article: Adsorption and separations of small molecules in porous media
Adsorption and separations of small molecules in porous media Open
Metal-organic frameworks (MOFs) are crystalline materials that contain metal-ions or metal-ion clusters as nodes and organic ligands as linkers to form 0-, 1-, 2-, and 3-D structures. Their structural versatility and multifunctional proper…
View article: Appropriateness of NHS 111 Wales outcomes—using the Call Prioritisation Streaming System: a RAND/UCLA modified Delphi method
Appropriateness of NHS 111 Wales outcomes—using the Call Prioritisation Streaming System: a RAND/UCLA modified Delphi method Open
Introduction NHS 111 Wales offers 24-hour telephone assessment, care and referrals for urgent healthcare needs. Call handlers use the newly created and implemented Call Prioritisation Streaming System (CPSS) to assess patients. CPSS is a s…
View article: Temperature-Regulated Gating Enables Gas Separations in Ultramicroporous Aluminum Formate, ALF
Temperature-Regulated Gating Enables Gas Separations in Ultramicroporous Aluminum Formate, ALF Open
Physisorption is a reversible exothermic phenomenon where molecular kinetic energy is limited and interactions between guest molecules and materials are favored at low temperatures. However, in certain ultramicroporous materials, physisorp…
View article: Phase Change-Mediated Capture of Carbon Dioxide from Air with a Molecular Triamine Network Solid
Phase Change-Mediated Capture of Carbon Dioxide from Air with a Molecular Triamine Network Solid Open
The efficient removal of CO2 from exhaust streams and even directly from air is necessary to forestall climate change, lending urgency to the search for new materials that can rapidly capture CO2 at high capacity. The…
View article: Reversible CO<sub>2</sub> Hydrogenation, Neutron Crystallography, and Hydride Reactivity of a Triiridium Heptahydride Complex
Reversible CO<sub>2</sub> Hydrogenation, Neutron Crystallography, and Hydride Reactivity of a Triiridium Heptahydride Complex Open
The authors report the structure, reactivity, and catalytic utility of a triiridium complex, [Ir 3 H 6 ( μ 3 ‐H)(PN) 3 ] 2+ ( 2‐H , PN = (2‐pyridyl)CH 2 PBu t 2 ). Despite its unusual stability to unsaturated organics, electrophiles, and e…
View article: Reversible CO<sub>2</sub> Hydrogenation, Neutron Crystallography, and Hydride Reactivity of a Triiridium Heptahydride Complex
Reversible CO<sub>2</sub> Hydrogenation, Neutron Crystallography, and Hydride Reactivity of a Triiridium Heptahydride Complex Open
The authors report the structure, reactivity, and catalytic utility of a triiridium complex, [Ir 3 H 6 ( μ 3 ‐H)(PN) 3 ] 2+ ( 2‐H , PN = (2‐pyridyl)CH 2 PBu t 2 ). Despite its unusual stability to unsaturated organics, electrophiles, and e…
View article: Structural and Dynamical Behaviors of Fast Ionic Conducting Potassium nido-(Carba)borates
Structural and Dynamical Behaviors of Fast Ionic Conducting Potassium nido-(Carba)borates Open
Solid-state batteries are one of the most recent iterations of electrochemical energy storage, and the technology can potentially provide safer and more-energy-dense batteries. The metal closo- and nido-(carba)borates show promise as versa…
View article: Hydrogen Storage in Flexible Frameworks
Hydrogen Storage in Flexible Frameworks Open
Hydrogen may be useful as carbon-free fuel source, but before hydrogen can be economically adopted at large scales, improved materials for storage are needed. Here we use a combination of high-pressure isothermal hydrogen adsorption measur…
View article: Correction: Materials laboratories of the future for alloys, amorphous, and composite materials
Correction: Materials laboratories of the future for alloys, amorphous, and composite materials Open
View article: Correction to “Stacking Faults Assist Lithium-Ion Conduction in a Halide-Based Superionic Conductor”
Correction to “Stacking Faults Assist Lithium-Ion Conduction in a Halide-Based Superionic Conductor” Open
A typographical error needs to be corrected in the Results section, subsection “2.5. Evaluation of Li+ Ion Conduction Properties”, fourth paragraph, where the activation energy barriers derived from PFG-NMR were swapped for comp…
View article: Materials laboratories of the future for alloys, amorphous, and composite materials
Materials laboratories of the future for alloys, amorphous, and composite materials Open
In alignment with the Materials Genome Initiative and as the product of a workshop sponsored by the US National Science Foundation, we define a vision for materials laboratories of the future in alloys, amorphous materials, and composite m…
View article: Sensitivity of electronic structure to crystal distortions in infinite-layered <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>LaNiO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
Sensitivity of electronic structure to crystal distortions in infinite-layered Open
Recent observations of unconventional superconductivity (SC) in thin films of LaNiO2 (critical temperature Tc≃ 10 K) and in bulk single crystals of La3Ni2O7 under pressure Tc
View article: Hamid Dabashi: The Arab Spring: The End of Postcolonialism
Hamid Dabashi: The Arab Spring: The End of Postcolonialism Open
Review of the classic by Hamid Dabashi: The Arab Spring: the End of Postcolonialism'. Excerpt: "In 2012 I began my PhD research in earnest, which originally had the broad and optimistic aim of studying dynamics of nonviolent resistance acr…
View article: High-temperature carbon dioxide capture in a porous material with terminal zinc hydride sites
High-temperature carbon dioxide capture in a porous material with terminal zinc hydride sites Open
Carbon capture can mitigate point-source carbon dioxide (CO 2 ) emissions, but hurdles remain that impede the widespread adoption of amine-based technologies. Capturing CO 2 at temperatures closer to those of many industrial exhaust stream…
View article: Progress in development of characterization capabilities to evaluate candidate materials for direct air capture applications
Progress in development of characterization capabilities to evaluate candidate materials for direct air capture applications Open
As part of U.S. national efforts to combat the detrimental effect of global climate change, the National Institute of Standards and Technology (NIST) was recently tasked to support efforts in direct air capture (DAC) of carbon dioxide rese…
View article: Nanotechnology solutions for the climate crisis
Nanotechnology solutions for the climate crisis Open
View article: The Influence of Reorientational and Vibrational Dynamics on the Mg<sup>2+</sup> Conductivity in Mg(BH<sub>4</sub>)<sub>2</sub>·CH<sub>3</sub>NH<sub>2</sub>
The Influence of Reorientational and Vibrational Dynamics on the Mg<sup>2+</sup> Conductivity in Mg(BH<sub>4</sub>)<sub>2</sub>·CH<sub>3</sub>NH<sub>2</sub> Open
Reorientational dynamics in solid electrolytes can significantly enhance the ionic conductivity, and understanding these dynamics can facilitate the rational design of improved solid electrolytes. Additionally, recent investigations on met…
View article: Geometric Tuning of Coordinatively Unsaturated Copper(I) Sites in Metal–Organic Frameworks for Ambient-Temperature Hydrogen Storage
Geometric Tuning of Coordinatively Unsaturated Copper(I) Sites in Metal–Organic Frameworks for Ambient-Temperature Hydrogen Storage Open
Porous solids can accommodate and release molecular hydrogen readily, making them attractive for minimizing the energy requirements for hydrogen storage relative to physical storage systems. However, H2 adsorption enthalpies in …
View article: Synthesis and characterization of the novel breathing pyrochlore compound Ba3Tm2Zn5O11
Synthesis and characterization of the novel breathing pyrochlore compound Ba3Tm2Zn5O11 Open
In this study, a novel material from the rare-earth based breathing pyrochlore family, Ba3Tm2Zn5O11, was successfully synthesized. Powder x-ray diffraction and high-resolution powder neutron diffraction confirmed phase purity and the F-43m…
View article: Neutron Vibrational Spectroscopic Study of the Acetonitrile:Acetylene (1:2) Cocrystal Relevant to Titan, Saturn’s Moon
Neutron Vibrational Spectroscopic Study of the Acetonitrile:Acetylene (1:2) Cocrystal Relevant to Titan, Saturn’s Moon Open
Saturn’s moon Titan features a surface composed of various organic solids with pronounced compositional and structural diversity. On top of the icy core, the surface experiences temperature of ~93 K and pressure of ~1.45 atm. Under these c…
View article: Neutron Vibrational Spectroscopic Study of the Acetylene:Ammonia (1:1) Cocrystal Relevant to Titan, Saturn’s Moon
Neutron Vibrational Spectroscopic Study of the Acetylene:Ammonia (1:1) Cocrystal Relevant to Titan, Saturn’s Moon Open
The surface of Titan, Saturn’s icy moon, is believed to be comprised of various molecular minerals with a great diversity in structure and composition. Under the surface conditions, 93 K and 1.45 atm, most small molecules solidify and form…
View article: Geometric Tuning of Coordinatively Unsaturated Copper(I) Sites in Metal–Organic Frameworks for Ambient-Temperature Hydrogen Storage
Geometric Tuning of Coordinatively Unsaturated Copper(I) Sites in Metal–Organic Frameworks for Ambient-Temperature Hydrogen Storage Open
Porous solids can accommodate and release molecular hydrogen readily, making them attractive for minimizing the energy requirements for hydrogen storage relative to physical storage systems. However, H2 adsorption enthalpies in such materi…
View article: Layer buckling and absence of superconductivity in LaNiO2
Layer buckling and absence of superconductivity in LaNiO2 Open
The recent observation of unconventional superconductivity in thin films of LaNiO2 (critical temperature, Tc~10 K) and in bulk single crystals of La3Ni2O7 (327) under pressure (Tc~80 K), has brought to light a long sought-after class of su…
View article: Breakdown of sound in superfluid helium
Breakdown of sound in superfluid helium Open
As elementary particles carry energy and momentum in the Universe, quasiparticles are the elementary carriers of energy and momentum quanta in condensed matter. And, as elementary particles, under certain conditions quasiparticles can be u…
View article: Small-pore hydridic frameworks store densely packed hydrogen
Small-pore hydridic frameworks store densely packed hydrogen Open
View article: CSD 2325926: Experimental Crystal Structure Determination
CSD 2325926: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: Water-enhanced CO<sub>2</sub> capture with molecular salt sodium guanidinate
Water-enhanced CO<sub>2</sub> capture with molecular salt sodium guanidinate Open
Solid-state amine absorbent materials, including those containing guanidine derivatives, have received tremendous attention as the world combats the challenges of climate change.
View article: Integrating crystallographic and computational approaches to carbon-capture materials for the mitigation of climate change
Integrating crystallographic and computational approaches to carbon-capture materials for the mitigation of climate change Open
This article presents a perspective on the state of the art in the structure determination of microporous carbon-capture materials and paths toward future progress in this field, as discussed the NIST workshop of the same title.