Preeclampsia: An accelerator–brake defect disorder

Nitric Oxide ◽  
2015 ◽  
Vol 47 ◽  
pp. S9
Author(s):  
Asif Ahmed ◽  
Shakil Ahmad ◽  
Keqing Wang
Keyword(s):  
Defect Disorder

scholarly journals Direct observation of electronic inhomogeneities induced by point defect disorder in manganite films

2010 ◽  
Vol 107 (11) ◽  
pp. 113903 ◽  
Author(s):  
M. Sirena ◽  
A. Zimmers ◽  
N. Haberkorn ◽  
E. Kaul ◽  
L. B. Steren ◽  
...  
Keyword(s):  
Point Defect ◽  
Direct Observation ◽  
Defect Disorder

Influence of calcium substitution on defect disorder in barium titanate by atomistic simulation

2015 ◽  
Vol 24 (1) ◽  
pp. 015001 ◽  
Author(s):  
D V Sampaio ◽  
J C A Santos ◽  
M V dos S Rezende ◽  
M E G Valerio ◽  
R S Silva
Keyword(s):  
Barium Titanate ◽  
Atomistic Simulation ◽  
Defect Disorder

scholarly journals The Effect of Defect Disorder on the Electronic Structure of Rutile TiO2-x

2006 ◽  
Vol 251-252 ◽  
pp. 1-12 ◽  
Author(s):  
Faruque M. Hossain ◽  
Graeme E. Murch ◽  
L. Sheppard ◽  
Janusz Nowotny
Keyword(s):  
Electronic Structure ◽  
Band Gap ◽  
Point Defects ◽  
Density Functional ◽  
Defect Formation ◽  
Energy Levels ◽  
Defect Energy ◽  
Defect Disorder ◽  
Effect Of Oxygen ◽  
Formation Energies

The purpose of this work is to study the effect of bulk point defects on the electronic structure of rutile TiO2. The paper is focused on the effect of oxygen nonstoichiometry in the form of oxygen vacancies, Ti interstitials and Ti vacancies and related defect disorder on the band gap width and on the local energy levels inside the band gap. Ab initio density functional theory is used to calculate the formation energies of such intrinsic defects and to detect the positions of these defect induced energy levels in order to visualize the tendency of forming local mid-gap bands. Apart from the formation energy of the Ti vacancies (where experimental data do not exist) our calculated results of the defect formation energies are in fair agreement with the experimental results and the defect energy levels consistently support the experimental observations. The calculated results indicate that the exact position of defect energy levels depends on the estimated band gap and also the charge state of the point defects of TiO2.

Titanium Dioxide Photocatalysts: Performance Related Properties

2010 ◽  
Vol 162 ◽  
pp. 329-335 ◽  
Author(s):  
Tadeusz Bak ◽  
Janusz Nowotny ◽  
Quang Vinh Nguyen
Keyword(s):  
Titanium Dioxide ◽  
Electronic Structure ◽  
Charge Transport ◽  
Water Splitting ◽  
Surface Properties ◽  
Water Purification ◽  
Light Absorption ◽  
Defect Chemistry ◽  
Defect Disorder ◽  
Specific Performance

The present work considers the performance-related properties of TiO2-based photosensitive semiconductors as photocatalysts for water purification and photoelectrodes for water splitting. These properties, including electronic structure, charge transport, surface properties, and near-tosurface properties, have an effect on light absorption and its conversion into chemical energy, and are closely related to defect disorder. Therefore, defect chemistry may be used as a framework for their modification in order to achieve enhanced performance. The present work considers the relationships between these specific performance-related properties and defect disorder.

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