Results 71 to 80 of about 107,798 (351)

Ultrastable Photoactive Halide Perovskite Nanocrystal‐Sensitized SnO2 Nanorods for Room‐Temperature NO2 Detection

Advanced Functional Materials, EarlyView.
ABSTRACT Metal oxide (MOx)‐based NO2 gas sensors typically require high temperatures or ultraviolet light, limiting their practical use. To enable visible‐light activation at room temperature, efficient and stable photosensitizers should be integrated with nanostructured MOx hosts.
Yeonji Yuk, Dokyum Kim, Jun‐Cheol Park, Yoonsung Jung, Inhyeok Oh, Donghyeon Lee, Yejoon Kim, Ji‐Eun Yeo, Young Min Song, Chang‐Lyoul Lee, Sanghan Lee   +10 more
wiley   +1 more source

A New Threshold Switching Device With Tunable Negative Differential Resistance Based on ErMnO3 Polymorphs

Advanced Functional Materials, EarlyView.
Polymorph engineering in ErMnO3 enables low‐voltage, forming‐free threshold switching with tunable negative differential resistance. Conducting orthorhombic regions embedded in an insulating hexagonal matrix provide controlled Joule‐heating‐enhanced Poole–Frenkel transport. The hexagonal phase prevents excessive heating and breakdown.
Rong Wu, Florian Maudet, Thanh Luan Phan, Wassim Hamouda, Richard Schroedter, Ahmet Samil Demirkol, Ronald Tetzlaff, Veeresh Deshpande, Catherine Dubourdieu   +8 more
wiley   +1 more source

Emerging Characterizing Techniques in the Fine Structure Observation of Metal Halide Perovskite Crystal

Crystals, 2018
Driven by its appealing application in the energy harvesting industry, metal halide perovskite solar cells are attracting increasing attention from various fields, such as chemistry, materials, physics, and energy-related industries.
Kongchao Shen, Jinping Hu, Zhaofeng Liang, Jinbang Hu, Haoliang Sun, Zheng Jiang, Fei Song   +6 more
doaj   +1 more source

Optical properties of perovskite alkaline earth titanates : a formulation

, 2002
In this communication we suggest a formulation of the optical conductivity as a convolution of an energy resolved joint density of states and an energy-frequency labelled transition rate.
Abhijit Mookerjee, Alouani M, Andersen O K, Bäuerle D, Cardona M, Castet-Mejean L, Cohen R E, Cohen R E, Dasgupta I, Ghosh S, Harrison W A, Hobbs D, Kamal Krishna Saha, King-Smith R D, Michel-Calendini M, Michel-Calendini M, Mookerjee A, Perkins P G, Saha K K, Saha S, Saha T, Singh D J, Skriver H L, Sonali Saha, T P Sinha, Tanusri Saha-Dasgupta, Ueda K, Ueda K, Uspenski Yu A   +28 more
core   +1 more source

Influence of order-disorder transitions on oxygen permeability through selected nonstoichiometric perovskite-type oxides [PDF]

, 1993
New results on the oxygen permeability of perovskite-type oxides SrCo0.8B'0.2O3¿¿ (with B'=Cr, Fe, Co and Cu) and La0.6Sr0.4CoO3¿¿ are presented. The occurrence of order-disorder transitions at elevated temperatures (790¿940°C) in these phases has been ...
Bouwmeester, H.J.M., Burggraaf, A.J., Doorn, R.H.E. van, Kruidhof, H.   +3 more
core   +3 more sources

Liquid Phase Transmission Electron Microscopy: A Window into the Early Stages of Complex Material Formation

Advanced Functional Materials, EarlyView.
Liquid‐phase transmission electron microscopy enables direct observation of nucleation and growth processes in solution. This review is dedicated to the remembrance of Helmut Cölfen and highlights recent studies on complex materials—oxides, biominerals, organic–inorganic crystals—which were central to his research activity. It summarizes key milestones,
Charles Sidhoum, Vinavadini Ramnarain, Nathaly Ortiz Peña, Dris Ihiawakrim, Clément Sanchez, Ovidiu Ersen   +5 more
wiley   +1 more source

RbCa2Nb3O10 from X-ray powder data

Acta Crystallographica Section E, 2009
Rubidium dicalcium triniobate(V), RbCa2Nb3O10, has been synthesized by solid-state reaction and its crystal structure refined from X-ray powder diffraction data using Rietveld analysis.
Zhen-Hua Liang, Kai-Bin Tang, Qian-Wang Chen, Hua-Gui Zheng   +3 more
doaj   +1 more source

Phase formation on the surface of lead ferroniobate depending on the conditions of mechanochemical synthesis and sintering [PDF]

Science of Sintering, 2016
The perovskite structure is formed at lower temperatures with an increase in the time of preliminary activation. It is demonstrated that thermal treatment of mechanically activated for 25 minutes mixture composed of niobium oxide, lithium ...
Gusev Aleksey Alekseevich, Raevski Igor Pavlovich, Avvakumov Evgeniy Grigorievich, Isupov Vitaliy Petrovich   +3 more
doaj   +1 more source

Effect of Al on the sharpness of the MgSiO_3 perovskite to post-perovskite phase transition [PDF]

, 2005
By means of static ab-initio computations we investigate the influence of Al on the recently discovered perovskite to post-perovskite phase transition in MgSiO_3. We examine three substitution mechanisms for Al in the two structures: MgSi → AlAl; SiSiO →
Akber-Knutson, S., Asimow, Paul D., Steinle-Neumann, G.   +2 more
core  

Synthesis of silicon doped SrMO3 (M=Mn, Co): stabilization of the cubic perovskite and enhancement in conductivity [PDF]

, 2011
In this paper we report the successful incorporation of silicon into SrMO3 (M=Co, Mn) leading to a structural change from a hexagonal to a cubic perovskite.
Hancock, C, Slater, Peter.R.
core   +1 more source