Results 41 to 50 of about 1,486 (218)

A first principles study of paramagnetic defects in diamond [PDF]

, 2011
Diamond is a radiation-hard material with a wide band-gap which is typically electrically insulating. A wide range of diamond-based material is available, including natural gemstones and synthetic diamondmanufactured by chemical vapour deposition (CVD ...
Etmimi, Khaled Mohamed
core  

Metastable paramagnetic centers in quartz from rocks of Gotthard massif (Switzerland) as potential indicators of geological processes

, 2020
In dieser Arbeit wurden metastabile paramagnetische Zentren in Quarz, die durch radioaktive Gesteinsstrahlung erzeugt worden sind, mittels EPR untersucht, um ihre Eignung und Zuverlässigkeit bei der Erkennung geologischer Prozesse zu ermitteln.
Scherer, Torsten
core   +1 more source

Asymmetric Electrostrain/Electrobending in Piezoelectric Ceramics: Role of Defect Dipoles or Oxygen Vacancies

Advanced Science, EarlyView.
Defect‐configurational origins of the asymmetric apparent electrostrain are revealed in different piezoelectric ceramics via atomic‐scale visualization of defect configurations. Migration of oxygen vacancies leads to the electrobending effect in N2‐sintered BaTiO3, while defect dipoles in Ba0.99TiO2.99 generate true asymmetric electrostrain without ...
Jie Wang, Geng Huangfu, Hongjie Zhang, Tiannan Yang, Zhenhua Ma, Jingsheng Chen, Yun Liu, Yiping Guo   +7 more
wiley   +1 more source

Graphdiyne as a Hole‐Transport Channel in Carbon Nitride Heterojunctions for Synergistic CO2 Reduction and γ‐Butyrolactone Synthesis

Angewandte Chemie, EarlyView.
A fully metal‐free heterojunction constructed from graphdiyne (GDY) and polymeric carbon nitride (PCN) enables efficient coupling of CO2 reduction and tetrahydrofuran oxidation. GDY serves as a hole‐transport channel, establishing a built‐in electric field that drives spatial charge separation. The optimized catalyst achieves near‐unity selectivity for
Xuan Zhang, Junqi Chai, Chong Wang, Wei Lin, Jing Tang, Oleksandr Savateev, Jimmy C. Yu, Jiajia Cheng   +7 more
wiley   +2 more sources

A High‐Entropy Strategy for Chemoresistive Ethanol Sensors With Remarkably Rapid and Selective Response

Advanced Science, EarlyView.
The configurational‐entropy strategy enables rapid and sensitive ethanol detection using a multicomponent oxide. The high‐entropy (InSnFeZnW)Ox provides enriched oxygen vacancies and diverse adsorption sites that strengthen surface reactivity. The sensor achieves a 5135% ethanol response with fast kinetics and stable long‐term operation.
Gi Baek Nam, Jin Ho Seo, Youngmin Kim, Hyuk Jin Kim, Yeong Jae Kim, Seon Ju Park, YunKyung Kim, Hyeon‐Min Yu, Jiwoo Lee, Ji Hyeon Lim, Jiheon Lim, Jong Hun Kang, WooChul Jung, Jong Jin Jung, Jeong Woo Han, Seung Eon Moon, Seong Ju Hwang, Jong‐Hoon Kang, Zhigang Zhu, Ho Won Jang   +19 more
wiley   +1 more source

Electron paramagnetic resonance and optical investigations of defect centres in diamond

, 1965
A survey of the optical and electron paramagnetic resonance (E.F.R.) absorption in a large number of diamonds from all major sources of production has revealed that perfect diamond is virtually non-existent.
Du Preez, L
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ENDOR investigation of defects in sodium [MATH]-alumina

, 1980
Plusieurs défauts paramagnétiques sont produits lorsque le superconducteur ionique alumine [MATH]-sodium est irradié aux rayons X à température ordinaire. Les spectres d'ENDOR et les spectres RPE révélés par ENDOR montrent qu'un défaut, dans le site O(5),
R. C. Barklie, J. M. Spaeth, J. R. Niklas   +2 more
core   +1 more source

Glycine‐Induced Unique Crystal Packing of Octacyanidetungstates With Strong Intermolecular Antiferromagnetic Interaction, Near‐Infrared Emission, and Second Harmonic Generation

Angewandte Chemie, EarlyView.
Glycine molecules induce a unique crystal packing into a supramolecular one‐dimensional columnar structure of octacyanidotungstates, which exhibits exceptionally strong antiferromagnetic superexchange interactions of J = −42.41(2) K between adjacent octacyanidotungstate units.
Tatsuya Konishi, Koji Nakabayashi, Kunal Kumar, Takeshi Suzuki, Kozo Okazaki, Masataka Kobayashi, Hidefumi Akiyama, Kouji Chiba, Shin‐ichi Ohkoshi   +8 more
wiley   +2 more sources

Trap Depth Modulation and Antenna Effect of Organic Ligands for Enhancing Rare‐Earth Long Persistent Luminescence

Advanced Science, EarlyView.
Different from the current research trends that mainly focus on optimizing a single color system, a universal organic–inorganic hybrid strategy is proposed, aiming to synergistically enhance the luminescent properties of red, green, and blue multi‐color inorganic long‐persistent phosphorescent materials by trap depth modulation and antenna effect of ...
Ting Tan, Nian Li, Bangmin Liu, Hao Wang, Xia Huang, Yuanjin Chen, Zhonghao Wang, Chaolong Yang   +7 more
wiley   +1 more source

Mechanisms of nitrogen aggregation in nickel- and cobalt-containing synthetic diamonds

, 2000
We present a study of the point defects observed in as-grown and annealed synthetic diamonds using electron paramagnetic resonance (EPR) and infrared spectroscopy.
Baker, Michael, Twitchen, DJ, M.E. Newton, Yelisseyev, AP, Newton, ME, J.M. Baker, Feigelson, BN, Yuryeva, OP, V.A. Nadolinny, D.J. Twitchen, O.P. Yuryeva, A.P. Yelisseyev, B.N. Feigelson, Nadolinny, VA   +13 more
core   +1 more source