Hydrothermal Processing of BaTiO3/Polymer Films

1994 ◽  
Vol 346 ◽  
Author(s):  
Elliott B. Slamovich ◽  
Ilhan A. Aksay
Keyword(s):  
Low Temperature ◽  
Ceramic Composite ◽  
Composite Films ◽  
Thin Layers ◽  
Precursor Film ◽  
Hydrothermal Processing ◽  
Liquid Precursor ◽  
Liquid Precursors ◽  
Low Concentrations ◽  
Film Cracking

ABSTRACTHydrothermally derived films of BaTiCO3 were fabricated by reacting thin layers of titanium organometallic liquid precursors in aqueous solutions containing Ba(OH)2 and having a high pH. Cubic submicron polycrystalline films of BaTiCO3 (thickness = 1 μm) were formed at 70°C. Low concentrations of block copolymers of polybutadiene and polystyrene were incorporated into the liquid precursor to prevent precursor film cracking. Higher polymer concentrations allowed fabrication of polymer/ceramic composite films by virtue of the low temperature used in hydrothermal processing.

Aging of low-temperature derived highly flexible nanostructured TiO2/P3HT hybrid films during bending

2019 ◽  
Vol 7 (17) ◽  
pp. 10805-10814
Author(s):  
Weijia Wang ◽  
Tobias Widmann ◽  
Lin Song ◽  
Thomas Fröschl ◽  
Nicola Hüsing ◽  
...  
Keyword(s):  
Low Temperature ◽  
Mechanical Stress ◽  
Composite Films ◽  
Hybrid Films ◽  
Nanostructured Tio2

The durability of titania and titania composite films under mechanical stress is studied and modeled with respect to the morphology.

Low-Temperature Liquid Precursors of Crystalline Metal Oxides Assisted by Heterogeneous Photocatalysis

2015 ◽  
Vol 27 (16) ◽  
pp. 2608-2613 ◽  
Author(s):  
Iñigo Bretos ◽  
Ricardo Jiménez ◽  
Dulce Pérez-Mezcua ◽  
Norberto Salazar ◽  
Jesús Ricote ◽  
...  
Keyword(s):  
Low Temperature ◽  
Metal Oxides ◽  
Heterogeneous Photocatalysis ◽  
Liquid Precursors ◽  
Temperature Liquid ◽  
Crystalline Metal

scholarly journals Low temperature fabrication of nanostructured Si-SiOx　and Si-SiNx composite films and their photoluminescence features

2004 ◽  
Vol 53 (11) ◽  
pp. 3818
Author(s):  
Ji Ai-Ling ◽  
Ma Li-Bo ◽  
Liu Cheng ◽  
Wang Yong-Qian
Keyword(s):  
Low Temperature ◽  
Composite Films ◽  
Nanostructured Si

Vapor deposition of parylene-F using hydrogen as carrier gas

1999 ◽  
Vol 14 (1) ◽  
pp. 246-250 ◽  
Author(s):  
D. Mathur ◽  
G-R. Yang ◽  
T-M. Lu
Keyword(s):  
Thin Films ◽  
Vapor Deposition ◽  
Device Fabrication ◽  
New Method ◽  
Silicon Substrates ◽  
Microelectronic Device ◽  
Precursor Method ◽  
Liquid Precursor ◽  
Carrier Gas ◽  
Liquid Precursors

A new method for depositing parylene-F (PA-F) thin films on silicon substrates has been explored. Hydrogen has been used as a carrier gas along with liquid precursors, dibromotetrafluoro-p-xylene and 1,4-bis(trifluoromethyl)benzene, to deposit PA-F. The properties of this film have been compared with the films obtained by the Gorham dimer method and the liquid precursor method using FTIR, XPS, and XRD. The PA-F films deposited by the dimer or liquid precursor acquired some kind of microcrystallinity on annealing. However, the PA-F films deposited in the presence of hydrogen were amorphous on annealing. This property could be potentially exploited for application in microelectronic device fabrication.

Single Crystal Zirconia Thin Films from Liquid Precursors

1989 ◽  
Vol 155 ◽  
Author(s):  
K. T. Miller ◽  
F. F. Lange
Keyword(s):  
Single Crystal ◽  
Lattice Mismatch ◽  
Lattice Parameter ◽  
Precursor Film ◽  
Yttrium Nitrate ◽  
X Ray Diffraction ◽  
Zirconium Acetate ◽  
Liquid Precursors ◽  
Crystal Film ◽  
Crystal Films

ABSTRACTEpitaxial, single-crystal films of ZrO2 (Y2O3) were formed on (100) oriented single crystal substrates of ZrO2 (9.5 mol% Y2O3) using water-based solutions of zirconium acetate and yttrium nitrate as a precursor. Film compostions of ZrO2 (0 - 40 mol% Y2O3) were examined; since the lattice parameter of ZrO2 (Y2O3) increases with yttria content, the lattice mismatch was systematically varied to a maximum of 1.5%. Precursor films were deposited by spin coating, pyrolyzed, and held for 1 hour at 900°C, 1000°C, and 1100°C. X-ray diffraction showed that a strongly oriented film had developed after pyrolysis of the precursor. In addition, all samples, except those treated at 1100°C containing 6 – 15 mol% Y2O3, gave (111) peaks, indicating film polycrystallinity. Electron back-scattering patterns showed that epitaxial single crystals were formed at 1100°C for films containing 3 – 20 mol% Y2O3. Scanning electron microscopy showed that the epitaxial films had a porous structure. These results indicate that the epitaxy is a two-stage process: oriented nucleation upon pyrolysis, followed, for low mismatches, by subsequent consolidation into a single-crystal film above 1000°C.

scholarly journals Photoluminescence excitation spectroscopy of GaN thin layers as a function of temperature

1997 ◽  
Vol 2 ◽  
Author(s):  
C. Guénaud ◽  
E. Deleporte ◽  
M. Voos ◽  
C. Delalande ◽  
B. Beaumont ◽  
...  
Keyword(s):  
Optical Properties ◽  
Low Temperature ◽  
Thin Layers ◽  
Photoluminescence Excitation ◽  
Temperature Dependent ◽  
Electron Hole ◽  
Yellow Band ◽  
Neutral Donor ◽  
Photoluminescence Line ◽  
Temperature Dependent Photoluminescence

We report on photoluminescence and photoluminescence excitation experiments performed on hexagonal GaN layers grown on a Sapphire substrate. Information about extrinsic and intrinsic optical properties have been obtained. We show that, at low temperature, the fundamental A excitons are preferentially involved in the relaxation towards the neutral donor bound exciton photoluminescence line, while electron-hole pairs rather participate in the relaxation towards D0−A0 emission and the yellow band. The relaxation from the A exciton towards the yellow band and D0−A0 emission is made easier by temperature. The band structure of the GaN layers has been determined from temperature dependent photoluminescence excitation spectroscopy: A and C excitons and A continuum band gap have been identified up to 210K.

scholarly journals Fast response time in liquid crystal cells doped with low concentrations of reactive mesogen via photopolymerization at low temperature

2017 ◽  
Vol 7 (8) ◽  
pp. 2740 ◽  
Author(s):  
Chun-Yu Chien ◽  
Luo-Yi Wu ◽  
Chia-Rong Sheu ◽  
Che-Ju Hsu ◽  
Chi-Yen Huang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Low Temperature ◽  
Response Time ◽  
Fast Response ◽  
Fast Response Time ◽  
Low Concentrations ◽  
Crystal Cells

Enhanced low-temperature magnetoresistance in facing-target reactive sputtered Ni–CNx composite films

2006 ◽  
Vol 89 (24) ◽  
pp. 242502 ◽  
Author(s):  
X. C. Wang ◽  
W. B. Mi ◽  
E. Y. Jiang ◽  
H. L. Bai
Keyword(s):  
Low Temperature ◽  
Composite Films
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