Document Detail


Study of semiconducting nanomaterials under pressure.
MedLine Citation:
PMID:  22271097     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The pressure induced structural and mechanical properties of nanocrystalline ZnO, ZnS, ZnSe, GaN, CoO, CdSe, CeO(2), SnO(2), SiC, c-BC(2)N, and β-Ga(2)O(3) with different grain sizes have been analyzed under high pressures. The molecular dynamics simulation model has been used to compute isothermal equation of state, volume collapse and bulk modulus of these materials in nano and bulk phases at ambient and high pressures and compared with the experimental data. It is evident from these calculations that the change in particle size affects directly the phase transition pressure and bulk modulus. The values of phase transition pressure and bulk modulus increase with decrease in grain size of the material. The equilibrium cell volume and volume collapse in parent phase is directly proportional to the grain size of the materials. Present results are in good agreement with experimental data. The model is able to explain these thermodynamic properties at varying temperatures and pressures successfully.
Authors:
Dinesh C Gupta; P Rana
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-01-22
Journal Detail:
Title:  Journal of molecular modeling     Volume:  18     ISSN:  0948-5023     ISO Abbreviation:  J Mol Model     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-06-25     Completed Date:  2012-10-22     Revised Date:  2013-03-15    
Medline Journal Info:
Nlm Unique ID:  9806569     Medline TA:  J Mol Model     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  3341-50     Citation Subset:  IM    
Affiliation:
Condensed Matter Theory Group, School of Studies in Physics, Jiwaji University, Gwalior, 474 011 MP, India. sosfizix@yahoo.co.in
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MeSH Terms
Descriptor/Qualifier:
Computer Simulation
Models, Theoretical*
Nanostructures / chemistry*
Pressure*
Semiconductors*
Thermodynamics

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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