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Materials

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Displaying 926 - 950 of 2328

Structural basis of CO2 adsorption in a flexible metal organic framework material

March 4, 2019
Author(s)
Andrew J. Allen, Winnie K. Wong-Ng, Eric J. Cockayne, Jeffrey T. Culp, Christopher Matranga
This paper reports the structural basis of CO2 adsorption in a representative model flexible metal organic framework (MOF) material, Ni(1,2-bis(4-pyridyl)ethylene)[Ni(CN)4] (NiBpene or PICNIC-60). NiBpene exhibits a CO2 sorption isotherm with

A Metal-Organic Framework with Suitable Pore Size and Dual Functionalities for Highly Efficient Post-Combustion CO 2 Capture

February 21, 2019
Author(s)
Hui-Men Wen, Caijun Liao, Libo Li, Ali Alsalme, Zeid Alothman, Rajamani Krishna, Hui Wu, Wei Zhou, Jun Hu, Banglin Chen
Capturing carbon dioxide (Co 2) from flue gases with porous materials has been considered as a viable alternative technology to replace the traditional liquid amine adsorbents. A large number of microporous metal-organic frameworks (MOFs) have been

Monitoring Fast, Voxel-Scale Cure Kinetics via Sample-Coupled-Resonance Photorheology

February 13, 2019
Author(s)
Callie I. Higgins, Lewis M. Cox, Frank W. DelRio, Jason P. Killgore
Photopolymerizable materials are the focus of extensive research across a variety of fields ranging from additive manufacturing to regenerative medicine. However, poorly understood material mechanical and rheological properties during polymerization at the

Dynamics of Hydride Ions in Metal Hydride-Reduced BaTiO 3 Samples Investigated with Quasielastic Neutron Scattering

January 31, 2019
Author(s)
Carin Eklof-Osterberg, Reji Nedumkandathil, Ulrich Haussermann, Aleksander Jaworski, Andrew J. Pell, Madhu Sudan Tyagi, Niina H. Jalarvo, Bernhard Frick, Antonio Faraone, Maths Karlsson
Perovskite-type oxyhydrides, BaTiO 3-xH^ x, have been recently shown to exhibit hydride ion (H -) conductivity at elevated temperatures, but the underlying mechanism of hydride ion conduction and how it depends on temperature and oxygen vacancy

Understanding Material Characteristics through Signature Traits from He Pycnometry

January 30, 2019
Author(s)
Huong Giang T. Nguyen, Jarod C. Horn, Matthew Bleakney, Daniel W. Siderius, Laura Espinal
Although helium pycnometry is generally the method of choice for skeletal density measurements of porous materials, few studies have provided a wide range of case studies that demonstrate how to best interpret raw data and perform measurements using it

Structural, chemical, electrical and thermal properties of n-type NbFeSb

January 26, 2019
Author(s)
Dean Hobbis, Raphael P. Hermann, Hsin Wang, David S. Parker, Tribhuwan Pandey, Joshua B. Martin, Katharine L. Page, George S. Nolas
We report on the structural, chemical, electrical and thermal properties of n-type polycrystalline NbFeSb synthesized by induction melting of the elements. Although several studies on p-type conduction of this half-Heusler composition have recently been

Bottom-up Copper Filling of Millimeter Size Through Silicon Vias

January 12, 2019
Author(s)
Daniel Josell, Thomas P. Moffat, Lyle Menk, Andrew Hollowell, M Blain
This work demonstrates void-free Cu filling of millimeter size Through Silicon Vias (mm-TSV) in an acid copper sulfate electrolyte using a combination of a polyoxamine suppressor and chloride, analogous to previous work filling TSV that were an order of

In Situ Characterization of the Microstructural Evolution of Biopharmaceutical Solid-State Formulations with Implications for Protein Stability

January 7, 2019
Author(s)
Stijn H.S. Koshari, Purnendu K. Nayak, Shalini Burra, Isidro E. Zarraga, Karthikan Rajagopal, Yun Liu, Norman J. Wagner, Abraham M. Lenhoff
Lyophilized and spray-dried biopharmaceutical formulations are used to provide long-term stability for storage and transport, but questions remain about the molecular structure in these solid formulations and how this structure may be responsible for

Near-Surface Elemental Analysis of Solids by Neutron Depth Profiling

December 31, 2018
Author(s)
Jamie Weaver, Robert Gregory Downing
Neutron Depth Profiling (NDP) is an analytical nuclear technique for the determination of elemental mass as a function of depth into a sample's surface. It is suitable for characterizing a few select elements in most solid materials to depths of

Boehmite and Gibbsite Nanoplates for the Synthesis of Advanced Alumina Products

December 28, 2018
Author(s)
Xin Zhang, Patricia L. Huestis, Carolyn I. Pearce, Jian Zhi Hu, Katharine Page, Lawrence M Anovitz, Alexandr B. Aleksandrov, Micah P. Prange, Sebastien Kerisit, Mark E. Bowden, Wenwen Cui, Zheming Wang, Nicholas R. Jaegers, Trent R. Graham, Mateusz Dembowski, Hsiu-Wen Wang, Jue Liu, Alpha T. N'Diaye, Markus Bleuel, David F. Mildner, Thomas M. Orlando, Greg A. Kimmel, Jay A. La Verne, Sue B. Clark, Kevin M. Rosso
Boehmite (γ-AlOOH) and gibbsite (α-A;(OH) 3) are important archetype (oxy)hydroxides of aluminum in nature that also play diverse roles across a plethora of industrial applications. As a consequence, highly precise synthesis of these pure phases with

Effects of Ionic Strength, Salt, and pH on Aggregation of Boehmite Nanocrystals: Tumbler Small-Angle Neutron and X-ray Scattering and Imaging Analysis

December 26, 2018
Author(s)
L. M. Anovitz, X. Zhang, J. Soltis, E. Nakouzi, A. J. Krzysko, J. Chun, G. K. Schenter, T. R. Graham, K. M. Rosso, J. J. De Yoreo, A. G. Stack, Markus Bleuel, Cedric V. Gagnon, David F. Mildner, J. Ilavsky, I. Kuzmenko
The U.S. government currently spends significant resources annually managing the legacies of the Cold War, including 300 million liters of highly radioactive wastes stored in hundreds of tanks at the Hanford Site (WA) and the Savannah River Site (SC). The

Cooperative Dynamics in a Model DPPC Membrane Arise from Membrane Layer Interactions

December 19, 2018
Author(s)
Kiley Kennedy, Neha Shafique, Jack F. Douglas, Francis W. Starr
The dynamics of model membranes can be highly heterogeneous, especially in more ordered dense phases. Experimentally, monolayers are often studied as a model system to infer the properties of membranes. To better understand the origins of this

Super Charge Separation and High Voltage Phase in Na x MnO 2

December 12, 2018
Author(s)
Xi Chen, Yichao Wang, Kamila Wiaderek, Xiahan Sang, Olaf Borkiewicz, Karena Chapman, James LeBeau, Jeffrey W. Lynn, Xin Li
Na xMnO 2 shows Mnu3+^ and Mn^ 4+ charge separation with charge stripe ordering upon Na de-intercalation at x=5/8, similar to many colossal magnetoresistance materials. We show in this paper that, surprisingly, at lower Na compositions of 5/8 >x less than

A simple and robust approach to reducing contact resistance in organic devices

December 3, 2018
Author(s)
Lamport Zachary, Katrina Barth, Hyunsu Lee, Martin Guthold, Iain McCulloch, John E. Anthony, Lee J. Richter, Eliot Gann, Dean DeLongchamp, Oana Jurchescu
Efficient injection of charge carriers from the contacts into the semiconductor layer is crucial for achieving high-performance organic devices. The potential drop necessary to accomplish this process yields a resistance associated with the contacts

Molecular Sieving of Ethylene from Ethane using a Rigid Metal-Organic Framework

November 26, 2018
Author(s)
Rui-Biao Lin, Libo Li, Hao-Long Zhou, Hui Wu, Chaohui He, Shun Li, Rajamani Krishna, Jinping Li, Wei Zhou, Banglin Chen
There are great challenges in developing efficient adsorbents to replace currently used and energy-intensive cryogenic distillation processes for olefin/paraffin separations, due to the similar physical properties of the two molecules. We report an

Analysis of Small Angle Neutron Scattering Spectra from Deformed Polymers with Spherical Harmonic Expansion Method and a Network Model

November 13, 2018
Author(s)
Zhi-Yuan Wang, Dejia Kong, Lincan Yang, Hongwei Ma, Fengmei Su, Kanae N. Ito, Yun Liu, Xuewu Wang, Zhe Wang
In this paper, we combine the recently proposed spherical harmonic expansion (SHE) method [Phys. Rev. X 2017, 7, 031003] with a modified network model to analyze the small-angle neutron scattering (SANS) spectra from deformed entangled polymers. Focusing

Hierarchically Patterned Elastomeric and Thermoplastic Polymer Films through Nanoimprinting and Ultraviolet Light Exposure

November 13, 2018
Author(s)
Jack F. Douglas, Ying Chen, Manish Kulkarni, Allan Marshall, Alamgir Karim, ZiLu Wang, Xiaoteng Wang, Abdullah Al-Enizi, Ahmed Elzatahry, Andrey V. Dobrynin
We develop a simple and generally applicable method to fabricate hierarchical interfacial patterns in elastomer and thermoplastic polymer films through a combination of nanoimprinting and UVO microlithography. Using this method, tunable and hierarchically
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