Results 51 to 60 of about 15,975 (304)

Laser induced distortion of band structure in solids: an analytic model [PDF]

open access: yes, 2018
We consider a spatially periodic (cosine) potential as a model for a crystalline solid that interacts with a harmonically oscillating external electric field.
Barna, Imre Ferenc   +2 more
core   +2 more sources

Atomic‐Level Ionic Displacement Polarization Enhanced Piezocatalytic Hydrogen Evolution in Covalent Organic Frameworks

open access: yesAdvanced Functional Materials, EarlyView.
Two isomorphic COFs were synthesized and compared, including an amphoteric COF (SQ‐TAPT) and a neutral COF (PDA‐TAPT). The ionic bonds in SQ‐TAPT introduce more Born effective charges, thereby enhancing its ionic displacement polarization. Experimental and theoretical calculations demonstrated that SQ‐TAPT exhibited higher polarity and stronger ...
Ge Yan   +12 more
wiley   +1 more source

Development of photocatalysis‐membrane separation reactor systems for aqueous pollutant removal

open access: yesPhotoMat, EarlyView., 2023
Abstract Background In our rapidly expanding society, the demand for clean water has steadily emerged as one of the most critical issues, promoting the development of numerous water treatment strategies. Aims Coupling photocatalysis and membrane separation technology provides an energy saving and environment‐friendly as well as sustainable method for ...
Junyang Zhang   +3 more
wiley   +1 more source

A Novel Radar Sensor for the Non-Contact Detection of Speech Signals

open access: yesSensors, 2010
Different speech detection sensors have been developed over the years but they are limited by the loss of high frequency speech energy, and have restricted non-contact detection due to the lack of penetrability.
Mingke Jiao   +5 more
doaj   +1 more source

Design of High‐Energy Anode for All‐Solid‐State Lithium Batteries–A Model with Borohydride‐Based Electrolytes

open access: yesAdvanced Materials Interfaces, EarlyView.
This study proposes a function‐sharing anode design to enable nonmetallic lithium insertion while maintaining intimate interfacial contact with the solid‐state electrolyte. A combination of lithium‐compatible and conformable borohydrides, highly conformable indium metal, less‐graphitized acetylene black, and a layer of highly graphitized massive ...
Keita Kurigami   +3 more
wiley   +1 more source

GEOLOGICAL SETTINGS AS BASE FOR MINING DEVELOPMENT

open access: yesRudarsko-geološko-naftni Zbornik, 1996
The geology and significance of nonmetal minerals of Croatia are described. Croatia has a significant resources of some nonmetal minerals. Nonmetal deposits according the mobilistic view of the genesis and structure of Dinarides are described.
Branko Crnković
doaj  

Quantum molecular dynamics simulations of the thermophysical properties of shocked liquid ammonia for pressures up to 1.3 TPa

open access: yes, 2013
We investigate via quantum molecular-dynamics simulations the thermophysical properties of shocked liquid ammonia up to the pressure 1.3 TPa and temperature 120000 K.
Li, Dafang, Yan, Jun, Zhang, Ping
core   +1 more source

Advanced Ceramics in Aerospace and Defense: The Interrelationship between Traditional and Additive Manufacturing Approaches

open access: yesAdvanced Materials Technologies, EarlyView.
Additive manufacturing revolutionizes production by enabling on‐demand, customized, and sustainable manufacturing with streamlined supply chains. While metal and polymer AM are well‐established, advanced ceramic AM is rapidly emerging, overcoming traditional material challenges.
Kateryna Oleksandrivna Shvydyuk   +2 more
wiley   +1 more source

The Predictive Power of Different Projector-Augmented Wave Potentials for Nuclear Quadrupole Resonance

open access: yesCrystals, 2019
The projector-augmented wave (PAW) method is used to calculate electric field gradients (EFG) for various PAW potentials. A variety of crystals containing reactive nonmetal, simple metal, and transition elements, are evaluated in order to determine the ...
Jaafar N. Ansari   +2 more
doaj   +1 more source

First principles study of electronic structure for cubane-like and ring-shaped structures of M4O4, M4S4 clusters (M = Mn, Fe, Co, Ni, Cu)

open access: yes, 2015
Spin-polarized DFT has been used to perform a comprehensive study of the geometric structures and electronic properties for isolated M4X4 nano-clusters between their two stable isomers - a planar rhombus-like 2D structure and a cubane-like 3D structure ...
Datta, Soumendu, Rahaman, Badiur
core   +2 more sources

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