Document Detail

Pressure solution at the molecular scale.
MedLine Citation:
PMID:  22107215     Owner:  NLM     Status:  In-Data-Review    
The topological evolution of the cleavage surface of a gypsum single crystal during its dissolution in a flowing undersaturated aqueous solution has been observed with an atomic force microscope. The matter transfer from solid to liquid proceeds through the migration of atomic steps. The step velocity has been measured and appears to depend on the force applied by the tip on the surface. Whereas the high force velocity enhancement is likely to stem from corrosive wear, the speed behavior at low force (<10  nN) differs drastically and can be interpreted as a consequence of the pressure solution of the crystal induced by the tip force. The step velocity evolution with the force obeys the known kinetic law of pressure solution. Hence these experiments enable us to evidence a first atomic mechanism at the origin of pressure solution.
Edgar Alejandro Pachon-Rodriguez; Agnès Piednoir; Jean Colombani
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Publication Detail:
Type:  Journal Article     Date:  2011-09-30
Journal Detail:
Title:  Physical review letters     Volume:  107     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-11-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  146102     Citation Subset:  IM    
Laboratoire de Physique de la Matière Condensée et Nanostructures; Université de Lyon; Université Claude Bernard Lyon 1; CNRS, UMR 5586; Domaine scientifique de la Doua, F-69622 Villeurbanne cedex, France.
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