Fabrication of Pt-IrOx and Au-V2O5 Thin Films

2007 ◽  
Vol 345-346 ◽  
pp. 735-740 ◽  
Author(s):  
Richard P. Vinci ◽  
T. Bannuru ◽  
Seung Min Hyun ◽  
Walter L. Brown
Keyword(s):  
Thin Films ◽  
Partial Pressure ◽  
Oxygen Affinity ◽  
Thermodynamic Characteristics ◽  
Oxide Dispersion Strengthened ◽  
Oxygen Solubility ◽  
Post Annealing ◽  
O2 Partial Pressure ◽  
High O2 ◽  
Equilibrium Oxygen

Pt-IrOx and Au-V2O5 thin films were created by magnetron co-sputtering from multiple targets in an Ar-O2 mixture. Successful Pt-IrOx production required high O2 partial pressure and slow deposition rate followed by post-annealing in pure O2. In contrast, deposition of Au-V2O5 films required relatively low O2 partial pressure, and did not need any post-anneal. These different strategies for forming oxide dispersion strengthened films in a multi-target reactive sputtering configuration are directly related to the thermodynamic characteristics of the two materials systems. The most important characteristics are the low equilibrium oxygen solubility in Pt and Au, and the different degrees of oxygen affinity by Ir and V.

Improvement in D-E Hysteresis Curve Squareness of PZT Thin Films - Effect of Oxygen Partial Pressure in High-Pressure Post-Annealing

2003 ◽  
Vol 52 (1) ◽  
pp. 137-145
Author(s):  
Junichi Karasawa ◽  
Taku Aoyama ◽  
Takeshi Kijima ◽  
Eiji Natori ◽  
Tatsuya Shimoda
Keyword(s):  
Thin Films ◽  
High Pressure ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Hysteresis Curve ◽  
Pzt Thin Films ◽  
Post Annealing ◽  
Effect Of Oxygen

Development of Reactive Ceramics for Conversion of Concentrated Solar Heat Into Solar Hydrogen With Two-Step Water-Splitting Reaction

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
H. Kaneko ◽  
S. Taku ◽  
Y. Naganuma ◽  
T. Ishihara ◽  
N. Hasegawa ◽  
...  
Keyword(s):  
Solid Solution ◽  
Partial Pressure ◽  
Water Splitting ◽  
Thermal Energy ◽  
Rapid Heating ◽  
Nonequilibrium State ◽  
Solar Thermal Energy ◽  
O2 Partial Pressure ◽  
High O2 ◽  
Institute Of Technology

The reactive ceramics suitable for the rotary-type solar reactor (proposed by Tokyo Institute of Technology, Tokyo) with two-step water-splitting reaction were developed. It is confirmed that O2 gas is evolved in the two-step water-splitting reaction with the reactive ceramics vigorously by rapid heating (α-O2-releasing reaction). The α-O2-releasing reaction is due to the formation of interstitial defect and the conversion of lattice oxygen into O2 gas at a nonequilibrium state. Reactive ceramics (NiFe2O4 and yttria stabilized zirconia (YSZ)-NiFe2O4 solid solution) can absorb solar thermal energy and convert thermal energy into chemical energy under high O2 partial pressure atmosphere in the α-O2-releasing reaction. Repetitive evolutions of O2 gas were observed in the two-step water-splitting reaction with YSZ-Fe3O4 solid solution and cerium based metal oxides (CeO2–NiO, CeO2–ZrO2, and CeO2–Ta2O5) at high O2 partial pressure. The CeO2–Ta2O5(Ce:Ta=90:10) released a large amount of O2 gas (3.95 cm3/g) in the α-O2 releasing reaction in the flow of air.

scholarly journals Transport behavior and electronic structure of phase pure VO2 thin films grown on c-plane sapphire under different O2 partial pressure

2013 ◽  
Vol 114 (5) ◽  
pp. 053703 ◽  
Author(s):  
Salinporn Kittiwatanakul ◽  
Jude Laverock ◽  
Dave Newby ◽  
Kevin E. Smith ◽  
Stuart A. Wolf ◽  
...  
Keyword(s):  
Thin Films ◽  
Electronic Structure ◽  
Partial Pressure ◽  
Transport Behavior ◽  
O2 Partial Pressure ◽  
Phase Pure ◽  
Vo2 Thin Films

Pressure increases oxygen affinity of whole blood and erythrocyte suspensions

1986 ◽  
Vol 61 (2) ◽  
pp. 486-494 ◽  
Author(s):  
R. B. Reeves ◽  
R. A. Morin
Keyword(s):  
Partial Pressure ◽  
Whole Blood ◽  
Oxygen Affinity ◽  
Partial Molal Volume ◽  
Erythrocyte Suspension ◽  
Molal Volume ◽  
Co2 Partial Pressure ◽  
Physiological Conditions ◽  
O2 Partial Pressure ◽  
Effect Of Hydrostatic Pressure

Effect of hydrostatic pressure (HP) on whole blood (WB) or erythrocyte suspension hemoglobin (Hb) O2 affinity has been studied using newly developed techniques. O2 partial pressure at which hemoglobin is half-saturated with O2 (P50) measurements were made at 5 HP (1, 26, 51, 76, and 126 ATA) on thin films of human WB or erythrocytes at 37 degrees C. CO2 partial pressure of WB was either 28 or 57 Torr (film pH 7.51 or 7.31). HP increased affinity of erythrocytes and WB. For erythrocytes in tris(hydroxymethyl)aminomethane buffer, the ratio (r) of P50 (1 ATA)/P50 (51 ATA) was 1.089 (P less than 0.01) at pH 7.0. WB P50 decreased with HP at a rate of -3.3 X 10(-2) Torr X atm-1; change in P50 at higher HP vs. 1 ATA was highly significant (P less than 0.01). No effect of HP was seen on the CO2 Bohr coefficient. Inert gas choice, N2 vs. helium (He), had no effect. Measurement of decrease of P50 with HP at 76 ATA in hemolyzed WB gave an r of 1.15, as great or greater than that found in WB, indicates that Donnan equilibrium alteration is not involved. No effect of HP was found in WB on the ratio of P50 of erythrocytes with normal (5 mmol/l erythrocytes) 2,3-diphosphoglycerate (DPG) to P50 of erythrocytes with less than 5% of normal DPG; i.e., no effect of pressure was seen on the independent influence of DPG on P50. WB measurements of Hb O2 uptake under simulated physiological conditions are characterized by a net decrease in partial molal volume on oxygenation of 30–35 ml/mol Hb4.

Growth Mechanisms of YBa2Cu3O7-δ Thin Films Post Annealed at a Low Oxygen Partial Pressure

1993 ◽  
Vol 312 ◽  
Author(s):  
S. Y. Hou ◽  
D. J. Werder ◽  
Julia M. Phillips ◽  
J. H. Marshall
Keyword(s):  
Thin Films ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Early Stage ◽  
Growth Mechanisms ◽  
Low Oxygen ◽  
Cross Sectional ◽  
Annealing Conditions ◽  
Post Annealing ◽  
Transmission Electron

AbstractThe growth mechanism of YBa2Cu3O 7-= thin films grown by the BaF2 post annealing process at low oxygen partial pressure have been studied by transmission electron microscopy. Under the annealing conditions of po2 = 4 Torr and 700°C, BaCuO2 and Y2 Cu2O5 precipitates develop from stoichiometric film precursors of YBCO during annealing. A growth model is proposed based on the observations. In addition, early stage nucleation and growth of both c- and a-axis oriented grains at the substrate interface were observed in quench annealed cross-sectional samples. 90° [100] symmetrical boundaries form between the a- and c-axis oriented grains. The possible effects of these boundaries are discussed.

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