Multicomponent condensation on the nucleation stage

2019 ◽  
Vol 150 (5) ◽  
pp. 054104 ◽  
Author(s):  
Anatoly E. Kuchma ◽  
Alexander K. Shchekin
Keyword(s):  
Multicomponent Condensation ◽  
Nucleation Stage

Phase Separation: From the Initial Nucleation Stage to the Final Ostwald Ripening Regime

1997 ◽  
Vol 481 ◽  
Author(s):  
Celeste Sagui ◽  
Dean Stinson O'Gorman ◽  
Martin Grant
Keyword(s):  
Phase Separation ◽  
Late Stage ◽  
Ostwald Ripening ◽  
Early Stage ◽  
Classical Problem ◽  
Nucleation And Growth ◽  
New Model ◽  
Nucleation Stage ◽  
Initial Nucleation

ABSTRACTIn this work we have re-examined the classical problem of nucleation and growth. A new model considers the correlations among droplets and naturally incorporates the crossover from the early-stage, nucleation dominated regime to the scaling, late-stage, coarsening regime within a single framework.

Synthesis of Cyano-pyrrolo[1,2-a][1,10]phenanthroline Derivatives Using a Multicomponent Condensation

2013 ◽  
Vol 50 (3) ◽  
pp. 568-572 ◽  
Author(s):  
Ghasem Marandi ◽  
Nourallah Hazeri ◽  
Malek T. Maghsoodlou ◽  
Sayyed M. Habibi-Khorassani ◽  
Niloufar Akbarzadeh Torbati ◽  
...  
Keyword(s):  
Multicomponent Condensation

scholarly journals Synthesis of Platinum Nanocrystals within Iodine Ions Mediated

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Jiamao Li ◽  
Jingwei Hou ◽  
Yu Gong ◽  
Chengjian Xiao ◽  
Lei Yue ◽  
...  
Keyword(s):  
Shape Control ◽  
Growth Process ◽  
Growth Stage ◽  
Nucleation Stage ◽  
Platinum Nanocrystals ◽  
High Resolution Tem ◽  
Pt Nanocrystals ◽  
High Concentrations ◽  
Insight Into

A liquid-phase reducing method of synthesizing Pt nanocrystals was demonstrated, and dendrite-, cube-, and cuboctahedron-shaped Pt nanocrystals (NCs) with well-defined monomorphic were successfully synthesized through iodine ions mediated with the CTAB agent. When the KI concentration was increased to thirty times of K2PtCl4 at the nucleation stage, the high-quality Pt nanodendrites could be obtained. However, no matter how many KI were added at the growth age, only cube- and cuboctahedron-shaped Pt nanocrystals formed. The results of high-resolution TEM, EDX, and XRD indicated that the size and shape of Pt NCs could be turned by changing the concentration and time of KI. In the nucleation stage, it might be due to that some iodine ions adsorb on the surfaces of Pt NCs, which probably cause the rapid growth process resulting in the formation of Pt nanodendrites. In the growth stage, although high concentrations of I− ions could contribute to the shape control and generate bigger particles of Pt NCs, small Pt particles do not grow into dendrites. The insight into the role of I− ions in synthesis of Pt NCs reported here provided a viewpoint for clearly understanding the formation mechanism of anisotropic platinum nanostructures.

Radiation Damage in NaCI: Calculations with an Extended Jain-Lidiard Model

1992 ◽  
Vol 294 ◽  
Author(s):  
Wim J. Soppe ◽  
J. Prij
Keyword(s):  
Rock Salt ◽  
Extended Version ◽  
Salt Formation ◽  
Mole Percent ◽  
Model Calculations ◽  
Nucleation Stage ◽  
Defect Centers ◽  
Waste Repository ◽  
High Level

ABSTRACTThe colloid growth due to irradiation in a rock salt formation is calculated with an extended version of the Jain-Lidiard model. The extensions of the model comprise a description of the nucleation stage of the colloids and the role of impurities on the formation of defect centers. Results of model calculations are shown for a representative design for a high-level radioactive waste repository in a rock salt formation. It is concluded that it is unlikely that, near the waste containers, the fraction of NaCl that will be converted to metallic Na and molecular Cl centers will exceed a few mole percent.

Structural Evolution of Nb/NbC Multilayer Coatings

2007 ◽  
Vol 336-338 ◽  
pp. 879-882 ◽  
Author(s):  
I. Dahan ◽  
M.P. Dariel
Keyword(s):  
Thermal Annealing ◽  
Cross Sections ◽  
Structural Evolution ◽  
Multilayer Coatings ◽  
Subsequent Growth ◽  
Present Communication ◽  
Temperature Range ◽  
Nucleation Stage ◽  
Initial Nucleation ◽  
Interdiffusion Kinetics

The present communication is concerned with the interdiffusion kinetics and the interface breakdown that take place in the Nb/NbC multilayer system as the result of thermal annealing in the 400-800oC temperature range. Within this temperature range carbon is the diffusing species. Carbon diffuses from the carbide layer into the adjacent Nb layer, depleting its concentration within the carbide, causing the nucleation and subsequent growth of an intermediate Nb2C layer and decreasing the width of the original Nb layer. TEM examination of the cross-sections of the multilayer specimens provides data regarding the evolution of the microstructure and, in particular, regarding the initial nucleation stage of the newly formed Nb2C layer.

scholarly journals 2-(2-(4-Methoxyphenyl)-4,9-dimethyl-7-oxo-7H-furo[2,3-f]chromen-3-yl)acetic Acid

Molbank ◽  
10.3390/m1304 ◽  
2021 ◽  
Vol 2021 (4) ◽  
pp. M1304
Author(s):  
Boris V. Lichitsky ◽  
Andrey N. Komogortsev ◽  
Valeriya G. Melekhina
Keyword(s):  
Acetic Acid ◽  
High Resolution Mass Spectrometry ◽  
13C Nmr Spectroscopy ◽  
Acid Moiety ◽  
Acidic Media ◽  
New Approach ◽  
Multicomponent Condensation ◽  
Reaction Proceeds ◽  
Initial Interaction ◽  
First Time

For the first time, we describe a new approach towards the synthesis of previously unknown 2-(2-(4-methoxyphenyl)-4,9-dimethyl-7-oxo-7H-furo[2,3-f]chromen-3-yl)acetic acid. The presented method is based on the multicomponent condensation of 5-hydroxy-4,7-dimethyl-2H-chromen-2-one, 4-methoxyphenylglyoxal and Meldrum’s acid. It was shown that the studied reaction proceeds in two steps including the initial interaction of starting materials in MeCN and the final formation of furylacetic acid moiety in acidic media. The structures of the obtained compound were established by 1H, 13C-NMR spectroscopy and high-resolution mass spectrometry.

Normalized Lithium Growth from the Nucleation Stage for Dendrite‐Free Lithium Metal Anodes

2019 ◽  
Vol 58 (50) ◽  
pp. 18246-18251 ◽  
Author(s):  
Nan Li ◽  
Qian Ye ◽  
Kun Zhang ◽  
Huibo Yan ◽  
Chao Shen ◽  
...  
Keyword(s):  
Lithium Metal ◽  
Nucleation Stage ◽  
Lithium Metal Anodes ◽  
Metal Anodes

scholarly journals A Microscopy and FTIR and PL Spectra Study of Polycrystalline Diamonds from Mengyin Kimberlite Pipes

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Zhijun Yang ◽  
Rong Liang ◽  
Xiangqing Zeng ◽  
Mingsheng Peng
Keyword(s):  
Growth Period ◽  
Diamond Growth ◽  
Dissolution Process ◽  
Diamond Nucleation ◽  
Pl Spectra ◽  
Nucleation Stage ◽  
Diamond Single Crystals ◽  
Mantle Fluids ◽  
Higher Temperature ◽  
P Type

The results of a microscopy and FTIR and PL spectra study of the natural polycrystalline diamonds from the Mengyin kimberlite pipes show that they can be classified as the euhedral faceted polycrystalline diamonds (EFPCDs) and anhedral rounded polycrystalline diamonds (ARPCDs). Different diamond grains or their points were formed in different conditions or processes. They were not formed in diamond nucleation stage, but in the diamond growth period. They probably originated from the relatively deeper mantle and were formed in the environment like the peridotitic (P) type diamond single crystals. The EFPCDs did not undergo a remarkable dissolution process during their formation and were possibly fast formed shortly before the kimberlite eruption. The ARPCDs not only were formed at a higher temperature than the EFPCDs but also underwent a notable dissolution process and had been stored relatively longer in the mantle. Fluids or melts probably participated in the formation of the ARPCDs or modified them during the period of their storage in the mantle.

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