Long-range interaction between rare-gas atoms or simple molecules and the surfaces of LiF,CaF2, sapphire, and BN

1986 ◽  
Vol 34 (4) ◽  
pp. 2794-2798 ◽  
Author(s):  
M. Karimi ◽  
G. Vidali
Keyword(s):  
Long Range ◽  
Rare Gas ◽  
Range Interaction ◽  
Long Range Interaction ◽  
Rare Gas Atoms ◽  
Simple Molecules

Long-Range Interaction in Some Simple Open-Shell Systems, Including Rare-Gas Sulfides:  Features of Post-Adiabatic Potentials and Couplings†

2004 ◽  
Vol 108 (41) ◽  
pp. 8731-8742 ◽  
Author(s):  
Mikhail B. Sevryuk ◽  
Lev Yu. Rusin ◽  
Simonetta Cavalli ◽  
Vincenzo Aquilanti
Keyword(s):  
Long Range ◽  
Open Shell ◽  
Rare Gas ◽  
Range Interaction ◽  
Long Range Interaction

Phase transformation and Raman spectra in BaTiO3 nanocrystals

2002 ◽  
Vol 718 ◽  
Author(s):  
Jian Yu ◽  
X. J. Meng ◽  
J.L. Sun ◽  
G.S. Wang ◽  
J.H. Chu
Keyword(s):  
Particle Size ◽  
Phase Transformation ◽  
Low Temperature ◽  
Long Range ◽  
Lattice Expansion ◽  
Inversion Symmetry ◽  
Range Interaction ◽  
Cooperative Phenomena ◽  
Long Range Interaction ◽  
Hydrothermal Methods

AbstractIn this paper, size-induced ferroelectricit yweakening, phase transformation, and anomalous lattice expansion are observed in nanocrystalline BaTiO3 (nc-BaTiO3) deriv ed b y low temperature hydrothermal methods, and they are w ellunderstood using the terms of the long-range interaction and its cooperative phenomena altered by particle size in covalen t ionic nanocrystals. In cubic nc-BaTiO3, five modes centerd at 186, 254, 308, 512 and 716 cm-1 are observed Raman active in cubic nanophase, and they are attributed to local rhombohedral distortion breaking inversion-symmetry in cubic nanophase. The254 and 308 cm-1 modes are significantly affected not only by the concentration of hydroxyl defects, but also their particular configuration. And the 806 cm-1 modes found to be closely associated with OH - absorbed on grain boundaries.

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