Search Publications

Displaying 1026 - 1050 of 2343

Emerging investigators in materials science 2017-2018

May 21, 2018

Author(s)

Frank W. DelRio, Robert Riggleman

Materials Research Express is a multidisciplinary journal devoted to publishing cutting-edge experimental and theoretical research on the processing, structure, properties, and performance of all classes of materials, with an emphasis on the following

Controlling Pore Shape and Size of Interpenetrated Anion-Pillared Ultramicroporous Materials Enables Molecular Sieving of CO 2 Combined with Ultrahigh Uptake Capacity

May 16, 2018

Author(s)

Mengdie Jiang, Bin Li, Xili Cui, Qiwei Yang, Zongbi Bao, Yiwen Yang, Hui Wu, Wei Zhou, Banglin Chen, Huabin Xing

The separation of carbon dioxide (CO 2) from hydrocarbons is a critical process for the production of clean energy and high-purity chemicals. Adsorption based on molecular sieving is an energy-saving separation process; however most of molecular sieves

Superconformal Nickel Deposition in Through Silicon Vias: Experiment and Prediction

May 16, 2018

Author(s)

Trevor Braun, Daniel Josell, Thomas P. Moffat, Hyo Jong Lee, SH Kim

This work examines the filling of Through Silicon Vias (TSV) by Ni deposition from a NiSO4 + NiCl2 + H3BO3 electrolyte containing a branched polyethyleneimine suppressor previously. Feature filling occurs through the coupling of transport limited

Effect of Pipe Flattening in API X65 Linepipe Steels Having Bainite vs. Ferrite/Pearlite Microstructures

May 15, 2018

Author(s)

Timothy Weeks, Singon Kang, John Speer, Chester Van Tyne

Fine Tuning and Specific Binding Sites with a Porous Hydrogen-Bonded Metal-Complex Framework for Gas Selective Separations

May 14, 2018

Author(s)

Zongbi Bao, Danyan Xie, Ganggang Chang, Hui Wu, Liangying Li, Wei Zhou, Hailong Wang, Zhiguo Zhang, Huabin Xing, Qiwei Yang, Michaek J. Zaworotko, Qilong Ren, Banglin Chen

Research on HOFs has been developed for quite a long time; however, those with both established permanent porosities and functional properties are extremely rare due to weak hydrogen-bonding interactions among molecular organic linkers which are much more

Why We Need to Look Beyond the Glass Transition Temperature to Characterize the Dynamics of Thin Supported Polymer Films

May 14, 2018

Author(s)

Jack F. Douglas, Wengang Zhang, Francis W. Starr

There is significant variation in the reported magnitude, and even the sign of Tg shifts in thin polymer films with the same chemistry, film thickness and supporting substrate. The implicit assumption of these studies is that methods used to estimate Tg in

The Impact of Adsorbates on Metal Deposition Through The Curvature Enhanced Accelerator Coverage Mechanism And Beyond

May 13, 2018

Author(s)

Daniel Josell, Thomas P. Moffat

Superconformal electrodeposition utilizing additives that adsorb on the deposit surface and either enhance or suppress metal deposition enabled the implementation of damascene interconnects in microelectronics using copper superfill in the late 1990s

Microstructural and Structural Characterization of Materials for CO2 storage using Multi-Scale X-Ray Scattering Methods

May 1, 2018

Author(s)

Greeshma Gadikota, Andrew Allen

A multi-scale understanding of CO2 interactions with natural materials is essential for engineering the safe and permanent storage of CO2 in geologic formations. Towards this end, the use of ultra small-, small-, and wide-angle X-ray scattering methods

Techno Economic Analysis Constrained Machine Learning Predictions of Materials for High Pressure Hydrogen Compression

April 30, 2018

Author(s)

Jason R. Hattrick-Simpers, Kamal Choudhary, Claudio Corgnale

Here we present the results of using techno-economic analysis as constraints for machine learning guided studies of new metal hydride materials. Using existing databases for hydrogen storage alloys a regression model to predict the enthalpy of

Fine-Tuning of Nano-Traps in a Stable Metal-Organic Framework for Highly Efficient Removal of Propyne from Propylene

April 28, 2018

Author(s)

Hui-Min Wen, Libo Li, Rui-Biao Lin, Bin Li, Bin Hu, Wei Zhou, Jun Hu, Banglin Chen

Despite tremendous effects, precise control in the synthesis of porous materials with ideal nanocages for desired gas separation applications still remains a challenge. Microporous metal-organic frameworks (MOFs) have provided the rich chemistry to enable

Tunable Noncollinear Antiferromagnetic Resistive Memory through Oxide Superlattice Design

April 27, 2018

Author(s)

Jason D. Hoffman, Stephen M. Wu, Brian Kirby, Anand Bhattacharya

Antiferromagnets have recently gathered a large amount of attention as a potential replacement for ferromagnets in spintronics devices due to their lack of stray magnetic fields, invisibility to external magnetic probes, and faster magnetization dynamics

Weak Magnetism of Aurivillius-Type Multiferroic Thin Films Probed by Polarized Neutron Reflectivity

April 27, 2018

Author(s)

Xioafang Zhai, Alexander Grutter, Yu Yun, Zhangzhang Cui, Yalin Lu

Unambiguous magnetic characterization of room-temperature multiferroic materials remains challenging due in part to difficulty of distinguishing their very weak ferromagnetism from magnetic impurity phases and other containments. In this study, we used

A Metal-Organic Framework with Optimized Porosity and Functional Sites for High Gravimetric and Volumetric Methane Storage Working Capacities

April 24, 2018

Author(s)

Hui-Min Wen, Bin Li, Libo Li, Rui-Biao Lin, Wei Zhou, Guodong Qian, Banglin Chen

Extensive research has been devoted to develop new porous materials for high methane storage capacity. While great progress has been made in recent years, it still remains very challenging to target simultaneously high gravimetric and volumetric methane

Screened Moments and Extrinsic In-Gap States in Samarium Hexaboride

April 18, 2018

Author(s)

W. T. Fuhrman, J. R. Chamorro, P. A. Alekseev, J.-M. Mignot, T. Keller, Jose Rodriguez Rivera, Yiming Qiu, P. Nikolic, T. M. McQueen, Collin L. Broholm

The Kondo impurity effect in metals is the result of quantum-mechanical scattering of conduction electrons by magnetic impurities. 1 This process leads to exotic effects such as unconventional superconductivity and an effective electron mass enhanced by 2

Nanoconfinement-Induced Phase Segregation of Binary Benzene-Cyclohexane Solutions within a Chemically Inert Matrix

April 12, 2018

Author(s)

Kathryn Krycka, Joseph A. Dura, II Langston, Christopher M. Burba

While a clear understanding of the effects of nanoconfinement on phase transitions of single components liquids is emerging, binary solutions hold promise to provide a fertile and detailed arena to probe intermolecular and molecular/surface interactions

On the Development of a Hydrogen-Assisted Fatigue Crack Growth Model for API Pipeline Steels

April 5, 2018

Author(s)

Andrew J. Slifka, Ryan M. White, Chris P. Looney, Elizabeth S. Drexler, Robert L. Amaro

Hydrogen has been proposed as a potential partial solution to the need for a clean energy economy. In order to make this a reality, large-scale hydrogen transportation networks need to be engineered and installed. Steel pipelines are the most likely

Structure-Property Relationships at Nafion Thin-Film Interfaces: Thickness Effects on Hydration and Anisotropic Ion Transport

April 3, 2018

Author(s)

Steven C DeCaluwe, Andrew M. Baker, Pavan Bhargava, John E. Fischer, Joseph Dura

The effect of film thickness on water uptake and structure in ultra-thin Nafion films is probed via in situ neutron reflectometry for a series of 10 samples with thicknesses ranging from 5–153 nm. Emphasis is given to the lamellae that form at hydrophilic

Journal of Applied Crystallography: The First 50 Years and Beyond

April 1, 2018

Author(s)

Andrew Allen, Janos Hajdu, Garry J. McIntyre

The first issue of the Journal of Applied Crystallography appeared in April 1968. So, with this issue we celebrate its 50th birthday! We should start by expressing our appreciation for all the readers, authors, reviewers, editors and technical staff who

Fiber Network Formation in Semi-Flexible Polymer Solutions: An Exploratory Computational Study

March 22, 2018

Author(s)

Jack F. Douglas, Luis F. Vargas Lara

The formation of gels through the bundling of semi-flexible polymer chains into fiber networks is ubiquitous in diverse manufactured and natural materials, and, accordingly, we perform exploratory molecular dynamics simulations of a coarse-grained model of

Glassy Phases in Organic Semiconductors

March 17, 2018

Author(s)

Chad R. Snyder, Dean M. DeLongchamp

Organic semiconductors may be processed from fluids using graphical arts printing and patterning techniques to create complex circuitry. Because organic semiconductors are weak van der Waals solids, the creation of glassy phases during processing is quite

Pure Electrical Switching of a Single Ferromagnetic Layer with Perpendicular Magnetization

March 16, 2018

Author(s)

Qinli Ma, Yufan Li, Daniel Gopman, Robert D. Shull, C. L. Chien

An ultimate goal of spintronics is to control magnetism via electrical means [1,2]. One promosing way is to utilize current-induced spin-orbital torque (SOT) originated from strong spin-orbital coupling in heavy metals and their interfaces to switch a

Zero-field current switching of magnetic domains via chiral domain walls

March 16, 2018

Author(s)

Yufan Li, Qinli Ma, Daniel Gopman, Yury Kabanov, Robert D. Shull, C Chien

In ferromagnetic (FM) materials, the inherent exchange interaction, magnetic anisotropy, & dipolar forces dictate the domain walls (DWs), Bloch or N´eel, that separate magnetic moments. However, in FM thin films in contact with heavy metal (HM) with strong

String-like Collective Motion in the alpha and beta relaxation of a Coarse-Grained Polymer Melt

March 14, 2018

Author(s)

Jack F. Douglas, Francis W. Starr, Beatriz Betancourt

Relaxation in glass-forming liquids occurs as a multi-stage process involving cooperative molecular motion. First, there is a `fast' relaxation process dominated by the inertial motion of the molecules whose scale grows upon heating, followed by a longer

Quantifying Lithium Salt and Polymer Density Distributions in Nanostructured Ion-Conducting Block Polymers

March 13, 2018

Author(s)

III Gartner, Melody A. Morris, Cameron K. Shelton, Joseph Dura, III Epps

Block polymer (BP) electrolytes offer significant advantages relative to existing liquid or polymer electrolytes due to their independently tunable ion transport and mechanical stability properties as a result of nanoscale of self-assembly. Many of these

Workshop Report: Research Roadmap for Reducing the Fire Hazard of Materials in the Future

March 8, 2018

Author(s)

Rick D. Davis, Mauro Zammarano, Nathan D. Marsh

NIST hosted workshop, Future Needs for Reducing the Fire Hazard of Materials, provided an opportunity for worlds experts to come together to discuss the challenges associated with reducing the fire hazards of existing and future products that compose the