heterogeneous nucleation


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heterogeneous nucleation

[‚hed·ə·rə¦jē·nē·əs ‚nü·klē′ā·shən]
(physical chemistry)
The formation of vapor bubbles on cavities or scratches of a surface bounding a superheated liquid.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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[35], another possible interpretation could be heterogeneous nucleation followed by 2D crystal growth that probably transforms to three-dimensional in the later stages of crystallization.
The calculation of the IN concentration is based on simple empirical equations, as shown above, and the initial ice crystal concentrations produced by heterogeneous nucleation are obtained by calculation.
Homogeneous and Heterogeneous Nucleation. Freezing nucleation can be divided into homogeneous nucleation and heterogeneous nucleation.
These findings i.e predominance of sulphate emissions at maximum load modes further ratifies the argument that, it is actually heterogeneous nucleation which increases both nuclei mode NP as well as sulphate emissions.
Simply placing vials on a shelf and lowering the shelf temperature leads to heterogeneous nucleation and non-uniform crystal growth, which impede primary drying.
Other areas examined include oxygen precipitation studied by X-ray diffraction techniques, structural defect studies of semiconductor crystals with Laue topography, tailoring the electrical properties of undoped GaP, and homogeneous and heterogeneous nucleation of oxygen in S-CZ.
There are two forms of nucleation: homogeneous nucleation and heterogeneous nucleation. In a pure solution, nuclei will form when SS rises above the formation product.
The nucleation theory can be grouped under two categories: homogeneous nucleation and heterogeneous nucleation. Table 1 presents the salient features of either types of nucleation.
For this purpose in [12] low MM PEs were emulsified to separate the nucleation from the growth process and to remove macroscopic heterogeneous nucleation sites.
Therefore, upon initial collision of the particles with the balls, heterogeneous nucleation occurs, and the balls become covered with a film of liquid.
There are natural homogeneous nucleation sites in the metal and others (heterogeneous nucleation sites) that are the result of inoculation.
Lebron and Suarez (1996) developed a precipitation rate model which considers the effects of DOC on both crystal growth and heterogeneous nucleation. The combined rate expression is given by:
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