Results 21 to 30 of about 655,886 (294)

Heterogeneous Crystal Nucleation from the Melt in Polyethylene Oxide Droplets on Graphite: Kinetics and Microscopic Structure

open access: yesCrystals, 2021
It is well known that the crystallization of liquids often initiates at interfaces to foreign solid surfaces. In this study, using polarized light optical microscopy, atomic force microscopy (AFM), and wide-angle X-ray scattering (WAXS), we investigate ...
Muhammad Tariq   +2 more
doaj   +1 more source

Impact of formulations of the homogeneous nucleation rate on ice nucleation events in cirrus [PDF]

open access: yesAtmospheric Chemistry and Physics, 2023
Homogeneous freezing of solution droplets is an important pathway of ice formation in the tropopause region. The nucleation rate can be parameterized as a function of water activity, based on empirical fits and some assumptions on the underlying ...
P. Spichtinger   +5 more
doaj   +1 more source

Homogeneous nucleation of silicon

open access: yesJournal of Aerosol Science, 1994
Abstract The homogeneous nucleation of silicon from the SiHCl system was studied theoretically for a wide range of compositions and temperatures. Contour plots of the conversion ratio and the chemical potential to nucleate are displayed. Nucleation rates were calculated using a modified classical nucleation model (Girshick et al. (1990) Aerosol Sci.
Kruis, F.E. (author)   +2 more
openaire   +3 more sources

Ice nucleation from aqueous NaCl droplets with and without marine diatoms [PDF]

open access: yesAtmospheric Chemistry and Physics, 2011
Ice formation in the atmosphere by homogeneous and heterogeneous nucleation is one of the least understood processes in cloud microphysics and climate. Here we describe our investigation of the marine environment as a potential source of atmospheric IN ...
P. A. Alpert, J. Y. Aller, D. A. Knopf
doaj   +1 more source

Effect of cloud‐scale vertical velocity on the contribution of homogeneous nucleation to cirrus formation and radiative forcing

open access: yesGeophysical Research Letters, 2016
Ice nucleation is a critical process for the ice crystal formation in cirrus clouds. The relative contribution of homogeneous nucleation versus heterogeneous nucleation to cirrus formation differs between measurements and predictions from general ...
X. Shi, X. Liu
doaj   +1 more source

Statistical Approach to Crystal Nucleation in Glass-Forming Liquids

open access: yesEntropy, 2021
In this work, methods of description of crystal nucleation by using the statistical approach are analyzed. Findings from classical nucleation theory (CNT) for the average time of formation of the first supercritical nucleus are linked with experimental ...
Joachim Deubener, Jürn W. P. Schmelzer
doaj   +1 more source

Numerical Study on the Effect of Pressure on Biodiesel/N-Pentanol Blended Droplet Homogeneous Micro-Explosion [PDF]

open access: yesE3S Web of Conferences
A three-dimensional droplet evaporation model using VOF is developed to study the influence of pressure on biodiesel/n-pentanol blended droplet homogeneous nucleation and evaporation characteristics.
Han Kai, Liu Minghou
doaj   +1 more source

Imaging the homogeneous nucleation during the melting of superheated colloidal crystals [PDF]

open access: yes, 2012
The nucleation process is crucial to many phase transitions, but its kinetics are difficult to predict and measure. We superheated and melted the interior of thermal-sensitive colloidal crystals and investigated by means of video microscopy the ...
Peng Y   +11 more
core   +1 more source

Theoretical approaches to nucleation in the gas phase. With a glimpse at experiments and dust formation in astrophysics

open access: yesEPJ Web of Conferences, 2012
An overview of the physics of homogeneous nucleation is presented, focusing on the main theoretical approaches that are currently available. We review the microscopic assumptions behind classical nucleation theory, as well as several improvements with ...
Calvo F., Parneix P.
doaj   +1 more source

A Model of Liquid-phase Homogeneous Nucleation in a System Containing Seed Particles [Translated]†

open access: yesKONA Powder and Particle Journal, 2014
This paper deals with particle formation by homogeneous nucleation in a system containing seed particles. A model of homogeneous nucleation previously developed by the present authors (Kousaka and Nomura, 1997) is ...
Yasuo Kousaka   +4 more
doaj   +1 more source

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