Local optical properties, electron densities, and london dispersion energies of atomically structured grain boundaries.
Quantitative analysis of spatially resolved valence electron energy-loss spectra shows strong physical property contrasts for Sigma5 and near Sigma13 grain boundaries in Fe-doped SrTiO3, resulting in London dispersion interaction energies of 14 to 50 mJ/m(2) between the adjacent grains. The determination of local physical properties of grain boundary cores and the appreciable contribution of long-range London dispersion to interface energies provides new information on formation and control of interfaces in materials.
van Benthem
Klaus
K
Max-Planck-Institut für Metallforschung, Heisenbergstrasse 3, 70569 Stuttgart, Germany.
Tan
Guolong
G
DeNoyer
Linda K
LK
French
Roger H
RH
Rühle
Manfred
M