Results 81 to 90 of about 386,226 (302)

Germanium isotope effect induced guest rattling and cage distortion in clathrates

Journal of Materiomics, 2018
Intermetallic clathrates are materials characterized by a large cage structure where guest atoms can move anharmonically, providing these materials exotic thermoelectric properties.
Ran Ang, Zhengshang Wang, Shang-Fei Wu, Pierre Richard, Zhenzhong Yang, Lin Gu, Gang Mu, Jingtao Xu, Ning Liu, Jun Tang   +9 more
doaj   +1 more source

Nitrogen Isotope Fractionation During Archaeal Ammonia Oxidation: Coupled Estimates From Measurements of Residual Ammonium and Accumulated Nitrite

Frontiers in Microbiology, 2020
The naturally occurring nitrogen (N) isotopes, 15N and 14N, exhibit different reaction rates during many microbial N transformation processes, which results in N isotope fractionation. Such isotope effects are critical parameters for interpreting natural
Maria Mooshammer, Ricardo J. E. Alves, Barbara Bayer, Michael Melcher, Michaela Stieglmeier, Lara Jochum, Simon K.-M. R. Rittmann, Margarete Watzka, Christa Schleper, Gerhard J. Herndl, Gerhard J. Herndl, Wolfgang Wanek   +11 more
doaj   +1 more source

Multipurpose Transparent Nanocomposites for Gamma Spectroscopy, Pulse Shape Discrimination, Thermal Neutron Detection, Radiation Shielding, and High Refractive Index Applications

Advanced Functional Materials, EarlyView.
Materials exist that are useful for gamma scintillation, radiation shielding, neutron‐gamma pulse shape discrimination (PSD), thermal neutron detection, or high refractive index applications. While certain materials have exhibited optimal performance for each of these applications, none achieve multiple functions.
Isabelle Winardi, Stephane Miaule, Robert Carmichael, Bowen Sun, Ziqing Han, Prabhav Surabhi, Zhen Luo, Noelan Hum, David Prout, Yi‐An Chen, Ting‐Hsuan Wu, Hao Yu, Arion Chatziioannou, Qibing Pei   +13 more
wiley   +1 more source

First-Principles Calculation of the Superconducting Transition in MgB2 within the Anisotropic Eliashberg Formalism

, 2001
We present a study of the superconducting transition in MgB2 using the ab-initio pseudopotential density functional method and the fully anisotropic Eliashberg equation. Our study shows that the anisotropic Eliashberg equation, constructed with ab-initio
A.F. Goncharov, A.Y. Liu, D.G. Hinks, David Roundy, F. Bouquet, F. Bouquet, F. Giubileo, H.D. Yang, Hong Sun, Hyoung Joon Choi, J. Hlinka, J. Kortus, J. Nagamatsu, J.M. An, J.P. Carbotte, K.-P. Bohnen, Marvin L. Cohen, P. Morel, P. Szabó, P.B. Allen, S. Tsuda, S.L. Bud’ko, Steven G. Louie, T. Yildirim, W.L. McMillan, Y. Kong, Y. Wang   +26 more
core   +1 more source

Ligand effects, solvent cooperation, and large kinetic solvent deuterium isotope effects in gold(I)-catalyzed intramolecular alkene hydroamination

Beilstein Journal of Organic Chemistry
Kinetic studies on the intramolecular hydroamination of protected variants of 2,2-diphenylpent-4-en-1-amine were carried out under a variety of conditions with cationic gold catalysts supported by phosphine ligands.
Ruichen Lan, Brock Yager, Yoonsun Jee, Cynthia S. Day, Amanda C. Jones   +4 more
doaj   +1 more source

Selective Separation of the Rare Earth Elements Dysprosium and Neodymium via Tailoring Nanocellulose Chemical Structure

Advanced Functional Materials, EarlyView.
Dicarboxylate‐modified anionic hairy cellulose nanocrystals exhibit a high selectivity for dysprosium(III) over neodymium(III). This selectivity arises from disordered dicarboxylate cellulose “hairs” that enable cooperative ionic coordination, hydrogen bonding, and strain‐induced conformational shrinkage.
Roya Koshani, Shang‐Lin Yeh, Karuna Anna Sajeevan, Mica L. Pitcher, Dawson Alexander, Ratul Chowdhury, Amir Sheikhi   +6 more
wiley   +1 more source

Isotope Effect in the Superfluid Density of HTS Cuprates: Stripes, Pseudogap and Impurities

, 2005
Underdoped cuprates exhibit a normal-state pseudogap, and their spins and doped carriers tend to spatially separate into 1- or 2-D stripes. Some view these as central to superconductivity, others as peripheral and merely competing.
G. V. M. Williams, J. L. Tallon, J. R. Cooper, J. Storey, J. P. Franck, R. S. Islam, W. D. Allen   +6 more
core   +1 more source

Fractionation of sulfur isotopes by Desulfovibrio vulgaris mutants lacking hydrogenases or type I tetraheme cytochrome c3

Frontiers in Microbiology, 2013
The sulfur isotope effect produced by sulfate reducing microbes is commonly used to trace biogeochemical cycles of sulfur and carbon in aquatic and sedimentary environments.
Min Sub eSim, Min Sub eSim, David T Wang, Grant M Zane, Judy D Wall, Tanja eBosak, Shuhei eOno   +6 more
doaj   +1 more source

Trap‐Assisted Transport and Neuromorphic Plasticity in Lead‐Free 2D Perovskites PEA2SnI4

Advanced Functional Materials, EarlyView.
An artificial retina built from lead‐free layered perovskite (PEA)2SnI4 converts light input into a persistent photocurrent and sums successive flashes over time. Micro/nanocrystals integrated on electrodes act as synapse‐like pixels that perform temporal integration directly in hardware. This in‐sensor preprocessing merges detection and computation on
Ofelia Durante, Valeria Demontis, Jonas Riisnaes Karl, Lam Hoi Tung, Sebastiano De Stefano, Daniela Marongiu, Adolfo Mazzotti, Aditya Bhardwaj, Francesco Mattana, Elisa Pili, Selene Matta, Federico Paolucci, Michele Saba, Andrea Mura, Giovanni Bongiovanni, Monica F Craciun, Saverio Russo, Antonio Di Bartolomeo   +17 more
wiley   +1 more source

Resonant pairing isotope effect in polaronic systems

, 2005
The intermediate coupling regime in polaronic systems, situated between the adiabatic and the anti-adiabatic limit, is characterized by resonant pairing between quasi-free electrons which is induced by an exchange interaction with localized bipolarons ...
A. Furrer, Alfonso Romano, Julius Ranninger   +2 more
core   +1 more source