Relaxation of localized excitons by phonon emission at oxygen vacancies in Cu2O

2014 ◽  
Vol 155 ◽  
pp. 65-69 ◽  
Author(s):  
Sandhaya Koirala ◽  
Mitsuyoshi Takahata ◽  
Yuji Hazama ◽  
Nobuko Naka ◽  
Koichiro Tanaka
Keyword(s):  
Oxygen Vacancies ◽  
Phonon Emission ◽  
Localized Excitons

Conditions for atomic imaging of mullite

1989 ◽  
Vol 47 ◽  
pp. 418-419
Author(s):  
T. A. Epicier ◽  
G. Thomas
Keyword(s):  
Oxygen Vacancies ◽  
High Resolution Electron Microscopy ◽  
Ceramic Materials ◽  
Work Conditions ◽  
Real Space ◽  
Potential Candidate ◽  
Silicate Mineral ◽  
Resolution Electron ◽  
The Subject ◽  
Aluminium Silicate

Mullite is an aluminium-silicate mineral of current interest since it is a potential candidate for high temperature applications in the ceramic materials field.In the present work, conditions under which the structure of mullite can be optimally imaged by means of High Resolution Electron Microscopy (HREM) have been investigated. Special reference is made to the Atomic Resolution Microscope at Berkeley which allows real space information up to ≈ 0.17 nm to be directly transferred; numerous multislice calculations (conducted with the CEMPAS programs) as well as extensive experimental through-focus series taken from a commercial “3:2” mullite at 800 kV clearly show that a resolution of at least 0.19 nm is required if one wants to get a straightforward confirmation of atomic models of mullite, which is known to undergo non-stoichiometry associated with the presence of oxygen vacancies.Indeed the composition of mullite ranges from approximatively 3Al2O3-2SiO2 (referred here as 3:2-mullite) to 2Al2O3-1SiO2, and its structure is still the subject of refinements (see, for example, refs. 4, 5, 6).

PHONON EMISSION CAUSED BY SUBHARMONIC GAP STRUCTURE OF SUPERCONDUCTING SN-I-SN TUNNEL JUNCTIONS

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-593-C6-594 ◽  
Author(s):  
W. Forkel ◽  
H. Schenk
Keyword(s):  
Tunnel Junctions ◽  
Phonon Emission ◽  
Gap Structure

Investigation of Some Characterizations of Black TiO\(_2\) Nanotubes Via Spectroscopic Methods

2019 ◽  
Vol 29 (2) ◽  
pp. 189 ◽  
Author(s):  
Tho Truong Nguyen ◽  
Thi Minh Cao ◽  
Hieu Van Le ◽  
Viet Van Pham
Keyword(s):  
Water Splitting ◽  
Oxygen Vacancies ◽  
Light Response ◽  
Nanotube Arrays ◽  
Spectroscopic Methods ◽  
Visible Light Response ◽  
Uv Visible ◽  
Visible Reflectance ◽  
Splitting Effect ◽  
Anodization Method

The black TiO\(_2\) with substantial Ti\(^3+\) and oxygen vacancies exhibit an excellent photoelectrochemical water-splitting performance due to the improved charge transport the extended visible light response. In this study, black TiO\(_2\) nanotube arrays synthesized by the anodization method, and then, they have been investigated some characterizations by spectroscopic methods such as UV-visible reflectance (UV-vis DRS), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and photoluminescence spectrum. The results showed that some highlighted properties of the black TiO2 nanotube arrays and they could apply for water-splitting effect.

Induced Phonon Emission in an Impurity Paramagnet Under Strong Electromagnetic Pumping

1998 ◽  
Vol 52 (1) ◽  
pp. 97-102 ◽  
Author(s):  
D. N. Makovetskii
Keyword(s):  
Phonon Emission

Oxygen Vacancies in Zirconium Oxide as the Blue Luminescence Centers and Traps Responsible for Charge Transport

2020 ◽  
Author(s):  
Damir R. Islamov ◽  
Vladimir A. Gritsenko ◽  
Timofey V. Perevalov ◽  
Vladimir Sh. Aliev ◽  
Alexander P. Yelisseyev ◽  
...  
Keyword(s):  
Charge Transport ◽  
Zirconium Oxide ◽  
Oxygen Vacancies ◽  
Blue Luminescence ◽  
Luminescence Centers

Oxidized indium with transformable dimensions for CO2 electroreduction toward formate aided by oxygen vacancies

2020 ◽  
Vol 4 (7) ◽  
pp. 3726-3731
Author(s):  
Fenghui Ye ◽  
Jinghui Gao ◽  
Yilin Chen ◽  
Yunming Fang
Keyword(s):  
Crucial Role ◽  
Oxygen Vacancies ◽  
Value Added ◽  
Promising Technique ◽  
Co2 Electroreduction ◽  
Value Added Products

Electroreduction of CO2 into value-added products is a promising technique in which the structure of the catalyst plays a crucial role.

CeO2 Nanostructures Enriched with Oxygen Vacancies for Photocatalytic CO2 Reduction

2019 ◽  
Vol 3 (1) ◽  
pp. 138-148 ◽  
Author(s):  
Abdo Hezam ◽  
Keerthiraj Namratha ◽  
Q. A. Drmosh ◽  
Deepalekshmi Ponnamma ◽  
Jingwei Wang ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Co2 Reduction

Sodium‐Decorated Amorphous/Crystalline RuO2 with Rich Oxygen Vacancies: A Robust pH‐Universal Oxygen Evolution Electrocatalyst

2021 ◽  
Author(s):  
Lijie Zhang ◽  
Haesesong Zhang ◽  
Huihui Liu ◽  
Min Gyu Kim ◽  
Dongjiang Yang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Vacancies

Effects of Oxygen Vacancies and Cation Valence States on the Triboelectric Property of Substoichiometric Oxide Films

2021 ◽  
Author(s):  
Yongqiao Zhu ◽  
Shiquan Lin ◽  
Wenchao Gao ◽  
Miao Zhang ◽  
Chaogui Yang ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Oxide Films ◽  
Valence States

Oxygen vacancies induced variations in structural, optical and dielectric properties of SnO2/graphite nanocomposite

2021 ◽  
Author(s):  
Zulfiqar ◽  
Sardar Ali Khan ◽  
Nasir Rahman ◽  
Tahirzeb Khan ◽  
RajWali Khan ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Oxygen Vacancies
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