نتایج جستجو برای: controlled crystallization

تعداد نتایج: 405292  

Journal: :Chemical communications 2009
Jun Jiang Shao-Feng Chen Lei Liu Hong-Bin Yao Yun-Hao Qiu Min-Rui Gao Shu-Hong Yu

Template-free polymorph discrimination of CaCO(3) can be easily realized by a so-called double-jet method in aqueous solution under mild conditions, which may shed new light on the controlled crystallization of other inorganic material systems in which polymorph selection is of critical importance or is highly relevant to their properties.

2005
Kiran Pan Kiran Pangal

The crystallization of hydrogenated amorphous silicon (a-Si:H) deposited by plasma-enhanced chemical vapor deposition (PECYD) by thermal annealing is of great interest for display and silicon-on-insulator (SOl) technologies. For large area electronics, there has been considerable interest to integrate both a-Si:H TFTs, for low leakage in the OFF state, and poly-Si TFTs, for high drive currents,...

Journal: :Chemical communications 2013
Shao-Feng Chen Helmut Cölfen Markus Antonietti Shu-Hong Yu

Stable monodispersed amorphous calcium carbonate (ACC) nanoparticles can be synthesized in ethanol media by a facile method, and crystallization of ACC is kinetically controlled, resulting in the formation of three polymorphs in a mixed solvent of ethanol-water at different pH values.

Journal: :Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics 2000
Louis Finken Hansen

We calculate for the first time the full phase diagram of an asymmetric nonadditivehard-sphere mixture. The nonadditivity strongly affects the crystallization and the fluid-fluid phase separation. The global topology of the phase diagram is controlled by an effective size ratio y(eff), while the fluid-solid coexistence scales with the depth of the effective potential well.

Journal: :The journal of physical chemistry. A 2011
Ping Wen Peter Harrowell C Austen Angell

We use calorimetrically detected crystal nucleation and growth studies to broaden the discussion of fluctuation-induced nucleation processes to include composition fluctuations in ionic complex-forming systems. We use the model system Ca(NO(3))(2)-KNO(3) with NaNO(3) introduced as a third component, so that crystallization kinetics can be controlled by change of alkali cation at constant mole f...

2012
Jumat Salimon Bashar Mudhaffar Abdullah Nadia Salih

UNLABELLED BACKGROUND This study was done to obtain concentrated polyunsaturated fatty acid (PUFA) linoleic acid (LA; 18:2) and monounsaturated fatty acid (MUFA) oleic acid (OA; 18:1) from Jatropha curcas seed oil by urea complexation. Urea complexation is a method used by researchers to separate fatty acids (FAs) based on their molecular structure. Effects the ratio of urea-to-FAs, crystall...

2016
P Beckstein V Galindo G Gerbeth A Schönecker V. Galindo G. Gerbeth A. Schönecker

The cost efficient, high throughput production of metaland semiconductor alloys is the foundation of many advanced technologies. With the development of the Ribbon Growth on Substrate (RGS) technology, a new crystallization technique is available that allows the controlled, high crystallization rate production of silicon wafers and advanced metal-silicide alloys. Compared to other crystallizati...

Journal: :Chemical communications 2007
Masami Sakamoto Atsushi Unosawa Shuichiro Kobaru Yasuhiro Hasegawa Takashi Mino Yoshio Kasashima Tsutomu Fujita

Naphthamides derived from L-proline, which exist as a mixture of several diastereomers in solution, converged to single diastereomer by crystallization, and the conformational transformation was controlled after the crystals were dissolved in the solvent at low temperature, where the frozen conformation was retained long enough for subsequent asymmetric reaction.

2002
Julia E. Hammer Malcolm J. Rutherford

[1] Experiments were conducted to study the temporal evolution of feldspar crystallization kinetics during isothermal decompression. Pinatubo dacite was held at 780 C, 220 MPa, fO2 = NNO + 2, H2O-saturated conditions for an equilibration period, decompressed to final pressures, Pf, ranging from 175 to 5 MPa, and then held for 0.3–931 hours. According to the plagioclase liquidus curve in PH2O-T ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی برق و کامپیوتر 1391

this thesis is presented 10 ghz voltage controlled ring oscillator for high speed application. the voltage controlled ring oscillator was designed and fabricated in 0.13یm cmos technology. the oscillator is 7-stages ring oscillator with one inverter replaced by nand-gate for shutting down in the ring oscillator during idle mode. tri-state inverter was used to control of 126 bit vector in ri...

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