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Materials

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Displaying 1126 - 1150 of 2343

Diffusion of water in silica: Influence of moderate stresses

August 29, 2017
Author(s)
Sheldon M. Wiederhorn, Susanne Wagner, Gabriele Rizzi, Michael J. Hoffmann, Theo Fett
Here we study the diffusive transfer of water into silica glass in the presence of externally applied stresses, and stresses caused by water induced swelling of the glass. By considering the simultaneous action of water penetration into the surface of

Pattern selection in ternary mushy layers

August 25, 2017
Author(s)
Daniel M. Anderson
We consider finite-amplitude convection in a mushy layer during the primary solidification of a ternary alloy. A previous linear theory identified, for the case of vanishing latent heat, solute rejection and background solidification, a direct mode of

Coarse-grained model of the dynamics of electrolyte solutions

August 17, 2017
Author(s)
Jack F. Douglas, Marat Andreev, Juan J. de Pablo, Alexandros Chremos
Ion specific solvation has fundamental implications in biochemistry and the thermo- dynamics and dynamics of aqueous salt solutions has correspondingly been investigated intensively. Nonetheless, recent works have indicated fundamental unresolved issues in

Microanalysis: What Is It, Where Did It Come From, and Where Is It Going?

August 4, 2017
Author(s)
Dale E. Newbury
"Microanalysis" in the parlance of the Microanalysis Society (MAS) refers to spatially-resolved elemental and molecular analysis performed at the micrometer to nanometer to picometer scales by any combination of excitation and analytical spectrometry that

Unraveling the Single-Nanometer Thickness of Shells of Vesicle-Templated Polymer Nanocapsules

August 3, 2017
Author(s)
Andrew G.. Richter, Sergey A. Dergunov, Mariya D. Kim, Sergey N. Shmakov, Sai Venkatesh Pingali, Volker S. Urban, Yun Liu, Eugene Pinkhassik
The recent emergence of vesicle-templated nanocapsules as a viable platform for diverse applications has heightened the need for detailed structural characterization of nanocapsule shells and for better understanding of surfactant-mediated directed

Measurement and Modeling of the Ability of Crack Fillers to Prevent Chloride Ingress into Mortar

August 1, 2017
Author(s)
Scott Z. Jones, Dale P. Bentz, Jeffrey Davis, Daniel S. Hussey, David L. Jacobson, John L. Molloy, John R. Sieber
One of the most common repair procedures applied to damaged concrete is the filling of cracks by the application (injection) of an organic polymer. This operation is performed to increase the service life of the concrete by removing a preferential pathway

Transition and Alkali Metal Complex Ternary Amides for Ammonia Synthesis and Decomposition

July 21, 2017
Author(s)
Hujun Cao, Jianping Guo, Fei Chang, Claudio Pistidda, Wei Zhou, Xilun Zhang, Antonio Santoru, Hui Wu, Norbert Schell, Rainer Niewa, Ping Chen, Thomas Klassen, Martin Dornheim
A new complex ternary amide Rb 2[Mn(NHd2) 4], which simultaneously contains both transition and alkali metal catalytic sites, is developed. This is in line with the recently reported TM-LiH composite catalysts, which has been shown to effectively break the

Ultrahigh and Selective SO 2 Uptake in Inorganic Anion-Pillared Hybrid Porous Materials

July 21, 2017
Author(s)
Xili Cui, Qiwei Yang, Lifeng Yang, Rajamani Krishna, Zhiguo Zhang, Zongbi Bao, Hui Wu, Zongbi Ren, Wei Zhou, Banglin Chen, Huabin Xing
The efficient capture of SO 2 is of great significance in gas purification processes including the flue gas desulfurization (FGD) and natural gas purification, but the design of porous materials with high adsorption capacity and selectivity of SO 2 remains

Origin of Long Lifetime of Band-Edge Charge Carriers in organic-Inorganic Lead Iodide Perovskites

July 17, 2017
Author(s)
Tianran Chen, Wei-Liang Chen, Benjamin J. Foley, Jooseop Lee, Jacob P. C. Ruff, J. Y. Peter Ko, Craig Brown, Leland Harriger, Depei Zhang, Changwon Park, Mina Yoon, Yu-Ming Chang, Joshua J. Choi, Seung-Hun Lee
Long carrier lifetime is what makes hybrid organic-inorganic perovskites (HOIPs) high performance photovoltaic materials. The microscopic mechanism behind the unusually long carrier lifetime of greater than equal to} 1 υs is not well understood. Here we

Fast-Responding Bio-Based Shape Memory Thermoplastic Polyurethanes

July 14, 2017
Author(s)
Zoran S. Petrovic, Jelena Milic, Fan Zhang, Jan Ilavsky
Fast response shape-memory polyurethanes were prepared from bio-based polyols, diphenyl methane diisocyanate and butane diol. The bio-based polyester polyols were synthesized from 9-hydroxynonanoic acid, a product obtained by ozonolysis of fatty acids

Formation of [Cu 2 O 2 ] 2+ and [Cu 2 O] 2+ Toward C-H Bond Activation in Cu-SSZ-13 and Cu-SSZ-39

July 7, 2017
Author(s)
Bahar Ipek, Matthew J. Wulfers, Hacksung Kim, Florian Goeltl, Ive Hermans, Joseph P. Smith, Karl S. Booksh, Craig Brown, Raul F. Lobo
Cu- exchanged small-pore zeolites (CHA and AEI) form methanol from methane (>95% selectivity) using a 3-step cyclic procedure (Wulfers, M. J.; Teketel, S.; Ipek, B.; Lobo, R. F. Chem. Commun. 2015, 51, 4447–4450) with methanol amounts higher than Cu- ZSM-5

Rapid Large-Scale Assembly and Pattern Transfer of One-Dimensional Gold Nanorod Superstructures

July 7, 2017
Author(s)
Rana NMN Ashkar, Michael J. A. Hore, Xingchen Ye, Bharath NMN Natarajan, Nicholas J. Greybush, Thomas Lam, Christopher B. Murray
The utility of gold nanorods for plasmonic applications largely depends on the relative orientation and proximity of the nanorods within a material. Through previous studies have demonstrated methods that can generate side-by-side or chain-like nanorod
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