Relaxed, high-quality InP on GaAs by using InGaAs and InGaP graded buffers to avoid phase separation

2007 ◽  
Vol 102 (3) ◽  
pp. 033511 ◽  
Author(s):  
Nathaniel J. Quitoriano ◽  
Eugene A. Fitzgerald
Keyword(s):  
Phase Separation ◽  
High Quality

Electrospinning as a Versatile Method of Composite Thin Films Fabrication for Selected Applications

2019 ◽  
Vol 293 ◽  
pp. 35-49 ◽  
Author(s):  
Wiktor Matysiak ◽  
Tomasz Tański ◽  
Weronika Smok
Keyword(s):  
Thin Films ◽  
Phase Separation ◽  
Physicochemical Properties ◽  
Template Synthesis ◽  
Self Assembly ◽  
Textile Industry ◽  
Separation Method ◽  
Common Method ◽  
High Quality ◽  
Composite Thin Films

Today, one of the most popular nanomaterials are thin nanofibrous layers, which are used in many fields of industry, eg electronics, optics, filtration and the textile industry. They can be produced by various methods, such as drawing, template synthesis, molecular self-assembly or phase separation method, but the most common method is electrospinning from a solution or melts. Electrospinning is gaining more and more interest due to its versatility, simplicity and economy as well as the possibility of producing fibers from various types of polymeric, ceramic and metalic materials. Nanofibrous layers produced by this method are characterized by high quality and the desired physicochemical properties.

Binary and Ternary Mercury Chalcogenide Quantum Dots and Clusters

2002 ◽  
Vol 737 ◽  
Author(s):  
Masaru Kuno ◽  
Keith A. Higginson ◽  
Syed B. Qadri ◽  
Mohammad Yousuf ◽  
Benjamin L. Davis ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Phase Separation ◽  
Near Infrared ◽  
Band Edge ◽  
Band Edge Emission ◽  
Edge Emission ◽  
High Quality ◽  
Synthetic Strategy ◽  
Simultaneous Use

ABSTRACTThis paper describes the synthesis, characterization and optical properties of binary and ternary mercury chalcogenide quantum dots and clusters. Such materials were made by applying a synthetic strategy involving the simultaneous use of strong Hg(II) coordinating ligands and the explicit phase separation of both metal and chalcogen precursors. High quality QDs and clusters are obtained in this manner with sharply structured absorption and band edge emission covering the visible to near infrared.

scholarly journals Impact of Conditioning Substances and Filtration Pressure on Dewatering Efficiency of Sewage Sludge

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 361
Author(s):  
Tomasz Kamizela ◽  
Mariusz Kowalczyk
Keyword(s):  
Phase Separation ◽  
Fly Ash ◽  
Filter Cake ◽  
Solid Phase ◽  
Sludge Dewatering ◽  
High Quality ◽  
Filtration Process ◽  
Filtration Pressure ◽  
Selection Of

Sludge dewatering is a key element in sludge’s processing and management. Solid-phase separation, sludge volume reduction and the separation of a high-quality supernatant are the main tasks of the dewatering devices. The effectiveness of this task, in turn, results from the selection of the dewatering method and conditioning of the sludge before dewatering. The aim of the research was to determine the influence of conditioning substances (polyelectrolyte, fly ash and zeolite) on the efficiency of dewatering at variable filtration pressure. The use of polyelectrolyte in sludge conditioning was a solution that increased the efficiency of the filtration process. On the contrary, the use of structure-forming substances (fly ash and zeolite) slows the process but reduces the hydration of the filter cake. The same trends were obtained in dual conditioning combining dosing of polyelectrolyte and ash or zeolite. It was also shown that the dewatering efficiency of conditioned sludge with these two different substances (ash and zeolite) was the same. The use of zeolite in independent or dual conditioning was important for the quality of the supernatant.

scholarly journals Chemical Phase Separation of Superconductive and Ferromagnetic Domains inZnNNi3−xCox

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Takahiro Yamazaki ◽  
Akira Uehara ◽  
Katsuya Kozawa ◽  
Yoshihide Kimisima ◽  
Masatomo Uehara
Keyword(s):  
Phase Separation ◽  
Miscibility Gap ◽  
Composition Region ◽  
High Quality ◽  
Two Phase ◽  
Chemical Phase ◽  
Ferromagnetic Domains ◽  
Co Concentration ◽  
Phase Separation Behavior ◽  
Separation Behavior

Various ZnNyNi3−xCoxcompounds with differing Co content,x, were synthesized, and their magnetic properties were investigated. Uniform solid solutions could not be obtained at low Co content (x<0.75); instead micrometer-scaled ferromagnetic ZnNyNi0.6Co2.4domains formed embedded within a superconductive ZnNNi3bulk, showing chemical phase separation of superconductive ZnNNi3and ferromagnetic ZnNyNi0.6Co2.4. At intermediate levels of Co concentration (0.75<x<2), this two-phase separation might persist, and the superconductive behavior was strongly suppressed in this composition region. Only at high Co concentration (x>2) the uniform ferromagnetic solid solution ZnNyNi3−xCox(with most likelyy=0.5) formed. The phase separation behavior is intrinsic to the system, reflecting the existence of a miscibility gap in ZnNyNi3−xCoxfor the samples withx<2, and was shown not to be attributable to incomplete synthesis. In the two-phased samples, high-quality granular contact between the superconductor and ferromagnet has been realized, suggesting that the production of useful devices requiring high-quality contacts between superconductors and ferromagnets may be possible by making use of this two-phase situation.

scholarly journals Influence of the Growth Ambience on the Localized Phase Separation and Electrical Conductivity in SrRuO3 Oxide Films

Coatings ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 589
Author(s):  
Hsin-Ming Cheng
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Phase Transformation ◽  
Phase Separation ◽  
Structural Transition ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Epitaxial Thin Films ◽  
High Quality ◽  
Epitaxial Oxide

Perovskite SrRuO3 (SRO) epitaxial thin films grown on SrTiO3 (STO) (001) have been synthesized using pulsed laser deposition (PLD) under a series of oxygen pressures. High quality and conductive SRO thin films on STO have been achieved at 10−1 Torr oxygen pressure with the epitaxial relation of (110)<001>SrRuO3//(001)<010>SrTiO3. The lattice parameters of the thin films exhibit huge expansion by reducing the ambience (~10−7 Torr) during deposition, and the resistance increases by about two orders higher as compared with the low oxide pressure ones. The rise of resistivity can be ascribed to not only the deficiency of Ru elements but also the phase transformation inside SRO thin films. The correlation of growth ambience on the structural transition and corresponding resistivity of epitaxial oxide thin films have been explicitly investigated.

scholarly journals From high quality packing to disordered nucleation or phase separation in donor/acceptor interfaces: ClAlPc-C60 on Au(111)

2021 ◽  
Author(s):  
Esther Barrena ◽  
Rogger Palacios-Rivera ◽  
José Ignacio Martínez ◽  
Carmen Ocal
Keyword(s):  
Phase Separation ◽  
High Quality ◽  
Donor Acceptor ◽  
Chloroaluminum Phthalocyanine

The dramatic consequences that the orientation adopted by the molecular dipoles, in diverse arrays of chloroaluminum phthalocyanine (ClAlPc) on Au(111), have on the ulterior adsorption and growth of C60 are...

Some problems of objective-prism spectra classification

1966 ◽  
Vol 24 ◽  
pp. 51-52
Author(s):  
E. K. Kharadze ◽  
R. A. Bartaya
Keyword(s):  
Short Wave ◽  
High Quality ◽  
Stellar Spectra ◽  
Objective Prism

The unique 70-cm meniscus-type telescope of the Abastumani Astrophysical Observatory supplied with two objective prisms and the seeing conditions characteristic at Mount Kanobili (Abastumani) permit us to obtain stellar spectra of a high quality. No additional design to improve the “climate” immediately around the telescope itself is being applied. The dispersions and photographic magnitude limits are 160 and 660Å/mm, and 12–13, respectively. The short-wave end of spectra reaches 3500–3400Å.

Bulk standards for low-temperature biological x-ray microanalysis

1984 ◽  
Vol 42 ◽  
pp. 282-283
Author(s):  
P. Echlin ◽  
M. McKoon ◽  
E.S. Taylor ◽  
C.E. Thomas ◽  
K.L. Maloney ◽  
...  
Keyword(s):  
Phase Separation ◽  
Low Temperature ◽  
Analytical Method ◽  
Salt Solutions ◽  
Absolute Concentration ◽  
Cooling Process ◽  
X Ray ◽  
The Absolute ◽  
Analytical Procedures ◽  
Electrical Conductors

Although sections of frozen salt solutions have been used as standards for x-ray microanalysis, such solutions are less useful when analysed in the bulk form. They are poor thermal and electrical conductors and severe phase separation occurs during the cooling process. Following a suggestion by Whitecross et al we have made up a series of salt solutions containing a small amount of graphite to improve the sample conductivity. In addition, we have incorporated a polymer to ensure the formation of microcrystalline ice and a consequent homogenity of salt dispersion within the frozen matrix. The mixtures have been used to standardize the analytical procedures applied to frozen hydrated bulk specimens based on the peak/background analytical method and to measure the absolute concentration of elements in developing roots.

Sign in / Sign up

Export Citation Format

Share Document