Results 101 to 110 of about 920,364 (385)

Off‐Stoichiometry Engineering of the Electrical and Optical Properties of SrNbO3 Using Oxide Molecular Beam Epitaxy

open access: yesAdvanced Functional Materials, EarlyView.
The plasma edge of transparent conducting oxide SrNbO3 shifts from ∼2 eV in the visible range to 1.37 eV in the near‐infrared region by off‐stoichiometry using the vacancy sites as quasi‐substitutional virtual elements. This work advances the stoichiometry engineering of perovskite oxides using oxide molecular beam epitaxy, allowing synthesis beyond ...
Jasnamol Palakkal   +11 more
wiley   +1 more source

A New Method of Secure Authentication Based on Electromagnetic Signatures of Chipless RFID Tags and Machine Learning Approaches

open access: yesSensors, 2020
In this study, we present the implementation of a neural network model capable of classifying radio frequency identification (RFID) tags based on their electromagnetic (EM) signature for authentication applications.
Dragoș Nastasiu   +8 more
doaj   +1 more source

Pressure-Induced Valence Crossover and Novel Metamagnetic Behavior near the Antiferromagnetic Quantum Phase Transition of YbNi$_{3}$Ga$_{9}$ [PDF]

open access: yes, 2015
We report electrical resistivity, ac magnetic susceptibility and X-ray absorption spectroscopy measurements of intermediate valence YbNi$_{3}$Ga$_{9}$ under pressure and magnetic field.
1000060262953   +20 more
core   +2 more sources

Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst

open access: yesAdvanced Functional Materials, EarlyView.
This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu   +3 more
wiley   +1 more source

Nouvelles technologies et apprentissage du français en milieu universitaire: dialogues entre étudiants en télécommunications [PDF]

open access: yesSynergies Espagne, 2009
Aujourd’hui, les nouvelles technologies de l’information permettent d’accéder facilement aux échanges linguistiques et culturels. Les étudiants de français de l’École Technique Supérieure des Télécommunications (ETSIT) et ceux d’espagnol de Télécom ...
Mª Ángeles Lence
doaj  

Interdépendance et transformation des représentations sociales en réseaux [PDF]

open access: yes, 2013
International audienceL’idée que les représentations sociales fonctionnent en réseau n’est pas vraiment nouvelle en psychologie sociale. Entendues comme une forme de pensée sociale fortement ancrée dans l'univers idéologique des sociétés ...
A. Valence, N. Roussiau
core   +1 more source

Valence and Conduction Band Densities of States of Metal Halide Perovskites: A Combined Experimental–Theoretical Study

open access: yesJournal of Physical Chemistry Letters, 2016
We report valence and conduction band densities of states measured via ultraviolet and inverse photoemission spectroscopies on three metal halide perovskites, specifically methylammonium lead iodide and bromide and cesium lead bromide (MAPbI3, MAPbBr3 ...
James Endres   +10 more
semanticscholar   +1 more source

TEACHING VALENCY

open access: yesSchool Science and Mathematics, 1921
n ...
openaire   +1 more source

Elucidating Sodium Ion Storage Mechanisms in Hard Carbon Anodes at the Electronic Level

open access: yesAdvanced Functional Materials, EarlyView.
High‐resolution, multi‐frequency continuous wave, and pulsed Electron Paramagnetic Resonance (EPR) spectroscopy uncover the intricate Na ion storage mechanisms in hard carbon. This study reveals the coexistence of Na ion intercalation and solvent co‐intercalation, alongside a subsequent transition of Na ions from ionic to quasi‐metallic to metallic ...
Qingbing Xia   +5 more
wiley   +1 more source

Valence bond distribution and correlation in bipartite Heisenberg antiferromagnets

open access: yes, 2014
Every singlet state of a quantum spin 1/2 system can be decomposed into a linear combination of valence bond basis states. The range of valence bonds within this linear combination as well as the correlations between them can reveal the nature of the ...
Alet, Fabien   +2 more
core   +2 more sources

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