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Crystallogenesis and Mineralogy
Saint Petersburg, Russia
30 September-4 October 2007
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Conferences & Meetings 2nd International Conference "Crystallogenesis and Mineralogy"
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Gibbs-Thomson law and submicron crystals

RMS-DPI code:  2007-1-20-0
Scientific session:  Session 1. Fundamental problems of crystallogenesis
Author listing:  Rashkovich L.N., Chernov A.A.
Principal author:  Rashkovich Leonid
Language:  Russian
Abstract - Summary 
(short description):
Gibbs-Thomson law relates chemical potential of particles in condensed phase to their size. Difference in this law realization mechanism for a drop of liquid and for a small crystal will be discussed on the basis of our data obtained by in situ atomic force microscopy (AFM). Crystallization of two polymorphs of the protein lysozyme and of calcite from solution was studied. Review covers behavior of (1) the steps one lattice spacing high that terminate elementary growth layers, (2) two-dimensional islands of a new layer on a crystal face and (3) the small facets.
The AFM shows that movement of the weakly fluctuating steps characterized by low kink density and generation of the polygonized dislocation spiral follows the Gibbs-Thomson law only nearby the equilibrium point, at supersaturations lower then ~1% or less. At higher supersaturations at which the marginally soluble crystals typically grow, the process is determined by kinetics rather then by thermodynamics of kink generation and annihilation.
 
RMS-DPI code:  2007-1-20-0
Proceeedings volume 
in the RMS catalogue:
 
Crystallogenesis and Mineralogy
Pages:  32
File of proceedings 
(PDF): 
 251 K
Status:  printed
Accepted:  19/04/2007
Published on-line:  21/12/2007
Permanent address of publication:  http://www.minsoc.ru/2007-1-20-0/
Contact author(s):  Rashkovich, Leonid
 

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