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Materials

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Displaying 376 - 400 of 2328

2D honeycomb transformation into dodecagonal quasicrystals driven by electrostatic forces

December 7, 2022
Author(s)
Sebastian Schenk, Oliver Krahn, Eric J. Cockayne, Holger Meyerheim, Marc de Boissieu, Stefan Foerster, Wolf Widdra
Dodecagonal oxide quasicrystals are well established as examples of long range aperiodic order in two dimensions. However, despite investigations by scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), low-energy electron microscopy

Elemental excitations in MoI3 one-dimensional van der Waals nanowires

November 28, 2022
Author(s)
Fariborz Kargar, Zahra Barani, Nicholas Sesing, Thuc Mai, Topojit Debnath, Huairuo Zhang, Yuhang Liu, Yanbing Zhu, Subhajit Ghosh, Adam Biacchi, Felipe H. da Jornada, Ludwig Bartels, Tehseen Adel, Angela R. Hight Walker, Albert Davydov, Tina Salguero, Roger Lake, Alexander Balandin
We report the polarization-dependent Raman spectrum of exfoliated MoI3, a van der Waals material with a "true one-dimensional" crystal structure that can be exfoliated to individual atomic chains. The temperature evolution of several Raman features reveals

Vacancy-Driven Disorder and Elevated Dielectric Response in the Pyrochlore Pb 1.5 Nbd2^O 6.5

November 21, 2022
Author(s)
Uyen Dang, Jake O'Hara, Hayden Evans, Daniel Olds, Juan Chamorro, Daniel Hickox-Young, Geneva Laurita, Robin Macaluso
Lone-pair driven distortions are a hallmark of many technologically-important lead (Pb)-based materials. The role of Pb 2+ in polar perovskites is well understood and easily manipulated for applications in piezo- and ferroelectricity, but the control of

Aluminum Formate, Al(HCOO)3: An Earth-Abundant, Scalable, and Highly Selective Material for CO2 Capture

November 2, 2022
Author(s)
Hayden Evans, Dinesh Mullangi, Zeyu Deng, Yuxiang Wang, Shing B. Peh, Fengxia Wei, John Wang, Craig Brown, Dan Zhao, Pieremanuele Canepa, Anthony K. Cheetham
A combination of gas adsorption and gas breakthrough measurements show that the metal-organic framework, Al(HCOO) 3 (ALF), which can be made inexpensively from commodity chemicals, exhibits excellent CO 2 adsorption capacities and outstanding CO 2/N 2

Prestress in Composite Polymer Gels as a Model for Articular Cartilage

November 2, 2022
Author(s)
Alexandros Chremos, Jack F. Douglas, Peter Basser, Ferenc Horkay
Articular cartilage is a composite gel-like material found in animal and human joints and exhibits a unique load-bearing performance that has been challenging to reproduce in synthetic materials and in molecular dynamics simulations. We investigate a

Visualization of multi-orientational ordering within a single domain of donor non-fullerene acceptor blends

November 1, 2022
Author(s)
Eliot Gann, Christopher McNeill, Urvashi Bothra, Pramiti Hui, Wen Liang Tanc, Hariprasad Venugopal, Chandramouli Subramaniam, Amelia C.Y. Liu, Dinesh Kabra
We have studied the tailored micron-scale phase-separated bulk heterojunction (BHJ) morphology of the well-known polymer (PTB7-Th) and a narrow bandgap acceptor 2,2'-[[4,4,9,9-Tetrakis(4-hexylphenyl)-4,9-dihydro-s-indaceno [1,2-b:5,6-b']dithiophene-2,7

Synthesis, Structure, Te Alloying, and Physical Properties of CuSbS2

October 30, 2022
Author(s)
Dean Hobbis, Kaya Wei, Hsin Wang, Joshua Martin, George S. Nolas
Materials with very low thermal conductivities continue to be of interest for a variety of applications. We synthesized CuSbS2 employing a mechanical alloying technique in order to investigate its physical properties. The trigonal pyramid arrangement of

The Influence of Proteoforms: Assessing the Accuracy of Total VDBP Quantification by Proteolysis and LC-MS/MS

October 24, 2022
Author(s)
Lisa Kilpatrick, Roger Bouillon, Clay Davis, Clark Henderson, Andrew N. Hoofnagle, Steven Pauwels, Dirk Vanderschueren, Etienne Waelkens, Hans Wildiers, James H. Yen, Karen W. Phinney
Objectives: Vitamin D-binding protein (VDBP), a serum transport protein for 25-hydroxyvitamin D [25(OH)D], has three common proteoforms which have co-localized amino acid variations and glycosylation. A monoclonal immunoassay was found to differentially

Circular Economy in a High-Tech World

October 18, 2022
Author(s)
Kelsea Schumacher, Martin L. Green
The proliferation of electronics, batteries, and solar panels in recent decades has resulted in a substantial generation of end-of-life (EoL) "high-tech" products. Currently, these products follow a largely linear – extract, make, use, dispose – model, but

Snappy: A New Automated Testing Machine for Monitoring the Break Evolution Process during Single Fiber Fragmentation Test

October 14, 2022
Author(s)
Ami Ahure Powell, Richard Sheridan, Berkay Yucel, Sezen Yucel, Evan Rust, Jeremiah Woodcock, Jeffrey Gilman, Surya R. Kalidindi, Gale A. Holmes
A measurement of interfacial shear strength (IFSS) in fiber reinforced polymer (FRP) materials remains elusive after more than fifty years. This is due in part to the many sources of uncertainty, the time-consuming nature of the measurements, and the large

Contactless Excitation of Acoustic Resonance in Thin Wafers

October 4, 2022
Author(s)
Gan Zhai, Yizhou Xin, Cameron Kopas, Ella Lachman, Mark Field, Josh Y Mutus, Katarina Cicak, Joe Aumentado, Zuhawn Sung, William Halperin
Contactless excitation and detection of high harmonic acoustic overtones in a thin single crystal are described using radio frequency spectroscopy techniques. Single crystal [001] silicon wafer samples were investigated, one side covered with a Nb thin

Density changes in amorphous silicon induced by swift heavy ions

October 4, 2022
Author(s)
Sjoerd Roorda, Amelie Lacroix, Stephanie Codsi, Gabrielle Long, Fan Zhang, Steven Weigand, Christina Trautmann
Pure and gold-doped amorphous silicon membranes were irradiated with swift heavy ions (75 MeV Ag or 1.1 GeV Au ions) and studied by small angle X-ray scattering. The samples that were irradiated with 1.1 GeV Au ions produced a scattering pattern consistent
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