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Materials

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Displaying 776 - 800 of 2343

Manipulation of Coupling and Magnon Transport in Magnetic Metal-Insulator Hybrid Structures

June 15, 2020
Author(s)
Yabin Fan, Patrick Quarterman, Joseph Finley, Jiahao Han, Pengxiang Zhang, Justin T. Hou, Mark D. Stiles, Alexander Grutter, Luqiao Liu
Ferromagnetic metals and insulators are widely used for generation, control and detection of magnon spin signals. Most magnonic structures are based primarily on either magnetic insulators or ferromagnetic metals, while heterostructures integrating both of

Color, Structure, and Rheology of a Diblock Bottlebrush Copolymer Solution

June 7, 2020
Author(s)
Matthew A. Wade, Dylan Walsh, Johnny Ching-Wei Lee, Elizabeth Kelley, Kathleen Weigandt, Damien Guironnet, Simon A. Rogers
A structure-property-process relation is established for a diblock bottlebrush copolymer solution, through a combination of rheo-neutron scattering, imaging, and rheological measurements. Polylactic acid-b-polystyrene diblock bottlebrush copolymers were

Sub-Millisecond Time-Resolved Small-Angle Neutron Scattering Measurements at NIST

June 3, 2020
Author(s)
Charles J. Glinka, Markus NMN Bleuel, Peter NMN Tsai, Dominika Zakutna, Dirk Honecker, Dominique Dresen, Flore Mees, Sabrina Disch
Instrumentation for sub-millisecond time-resolved SANS measurements at the National Institute of Standards and Technology (NIST) is described and applied to the reorientation dynamics of elongated hematite nanoparticles. Instrumentation for time-resolved

High-throughput Density Functional Perturbation Theory and Machine Learning Predictions of Infrared, Piezoelectric and Dielectric Responses

May 27, 2020
Author(s)
Kamal Choudhary, Kevin F. Garrity, Vinit Sharma, Adam J. Biacchi, Francesca M. Tavazza, Angela R. Hight Walker
In this work, combining high-throughput (HT) density functional perturbation theory and supervised machine learning approaches, we explored the territory of compounds with interesting infrared, piezoelectric and dielectric properties. We have computed Γ

Embracing Uncertainty: Modeling Uncertainty in EPMA - Part I

May 21, 2020
Author(s)
Nicholas Ritchie
This is the first in a series of articles which present a new framework for computing the uncertainty in electron excited X-ray microanalysis measurements. This article will discuss the framework and apply it to a handful of simple but useful sub

Quantifying Strain via Buckling Instabilities in Surface Modified Polymer Brushes

May 21, 2020
Author(s)
Cassandra M. Reese, Wei Guo, Brittany J. Thompson, Phillip K. Logan, Christopher Stafford, Derek L. Patton
We present a quantitative method of measuring the compressive strain of wrinkled polymer films and coatings with knowledge of the "skin" thickness, wrinkle wavelength, and wrinkle amplitude. The derived analytical expression is validated with a well

Magnetic Properties and Electronic Origin of the Interface between Dilute Magnetic Semiconductors with Orthogonal Magnetic Anisotropy

May 15, 2020
Author(s)
Ryan F. Need, Seul-Ki Bac, Xinyu Liu, Sanghoon Lee, Brian Kirby, Margaret Dobrowolska, Jacek Kossut, Jacek K. Furdyna
Controlling changes in magnetic anisotropy across epitaxial film interfaces is an important prerequisite for many spintronic devices. For the canonical dilute magnetic semiconductor GaMnAs, magnetic anisotropy is highly tunable through strain and doping

Tuning interfacial Dzyaloshinskii-Moriya interactions in thin amorphous ferrimagnetic alloys

May 4, 2020
Author(s)
Yassine Quessab, Jun-Wen Xu, Chung Ting Ma, W. Zhou, Grant A. Riley, Justin Shaw, Hans Nembach, S. J. Poon, Andrew D. Kent
Skyrmions can be stabilized in magnetic systems with broken inversion symmetry and chiral interactions, such as Dzyaloshinskii-Moriya interactions (DMI). Further, compensation of magnetic moments in ferrimagnetic materials can significantly reduce magnetic

Optimization of the Pore Structures of MOFs for Record High Hydrogen Volumetric Working Capacity

April 28, 2020
Author(s)
Xin Zhang, Rui-Biao Lin, Jing Wang, Bin Wang, Bin Liang, Taner N. Yildirim, Jian Zhang, Wei Zhou, Banglin Chen
Metal-organic frameworks are promising materials for onboard hydrogen storage thanks to the tunable pore size, pore volume, and pore geometry. In consideration of pore structures, the correlation between the pore volume and hydrogen storage capacity is

Impact of Growth Kinetics on the Interface Morphology and Magnetization in La 1/3 Sr 2/3 FeO 3 /La 2/3 Sr 1/3 MnO 3 Heterostructures

April 17, 2020
Author(s)
M. Waschk, A. Sarkar, J. Barthel, J. Voigt, S. Schroder, P. Zakalek, M. Schmitz, Brian Kirby, S. Putter, J. Schubert, T. Bruckel
The ability to create atomically perfect, epitaxial heterostructures of correlated complex perovskite oxides using state-of-art thin film deposition techniques has generated new physical phenomena at engineered interfaces. Here we report on the impact of

Reversible Switching between Nonporous and Porous Phases of a New SIFSIX Coordination Network Induced by a Flexible Linker Ligand

April 15, 2020
Author(s)
Bai-Qiao Song, Qing-Yuan Yang, Shi-Qiang Wang, Matthias Vandichel, Amrit Kumar, Clare Crowley, Naveen Kumar, Cheng-Hua Deng, Victoria GasconPerez, Matteo Lusi, Hui Wu, Wei Zhou, Michael J. Zaworotko
Closed-to-open structural transformations in flexible coordination networks are of interest for their potential utility in gas storage and separation. Herein, we report the first example of a flexible SiF 6 2--pillared square grid material, [Cu(SiF 6)(L) 2

Metallo-N-Heterocycles - A New Family of Hydrogen Storage Material

April 1, 2020
Author(s)
Khai Chen Tan, Yang Yu, Ruting Chen, Teng He, Zijun Jing, Qijun Pei, Jintao Wang, Yong Shen Chua, Anan Wu, Wei Zhou, Hui Wu, Ping Chen
Storing hydrogen efficiently in condensed material under mild conditions is a key technique challenge. Here, we developed a new family of hydrogen storage material spanning across the domain of inorganic and organic hydrides, namely metalorganic hydrides

A Microporous Metal-Organic Framework with Naphthalene Diimide Groups for High Methane Storage

March 28, 2020
Author(s)
Yingxiang Ye, Rui-Biao Lin, Hui Cui, Ali Alsalme, Wei Zhou, Taner N. Yildirim, Zhangjing Zhang, Shengchang Xiang, Banglin Chen
We reported a microporous MOF FJU-101 with open naphthalene diimide functional groups for room temperature (RT) high methane storage. At RT and 65 bar, the total volumetric CH 4 storage capacity of 212 cm -3 in FJU-101a is significantly higher than the

Effect of Elevated Temperature and Humidity on Fibers Based on 5-amino-2-(p-aminophenyl) benzimidazole (PBIA)

March 19, 2020
Author(s)
Amy E. Engelbrecht-Wiggans, Ajay Krishnamurthy, Lucas H. Kaplan, Amanda L. Forster, Thanh N. Hoang, Viviana Bentley
Traditionally, soft body armor has been made from materials such as poly(p-phenylene terephthalamide) (PPTA) and ultra-high molar mass polyethylene (UHMMPE). However, to diversify the fiber choices in the United States body armor market, copolymer fibers

Twist Angle-Dependent Atomic Reconstruction and Moire Patterns in Transition Metal Dichalcogenide Heterostructures

March 13, 2020
Author(s)
Matthew R. Rosenberger, Hsun-Jen Chuang, Vladimir Oleshko, Madeleine Phillips, Kathleen M. McCreary, Saujan V. Sivaram, C. Stephen Hellberg, Berend T. Jonker
Van der Waals layered materials, such as the transition metal dichalcogenides (TMDs), are an exciting class of materials with weak interlayer bonding which enables one to create so-called van der Waals heterostructures (vdWH). One promising attribute of
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