Effective elastic properties of a van der Waals molecular monolayer at a metal surface
Journal article, 2010
Adsorbing anthracene on a Cu(111) surface results in a wide range of complex and intriguing superstructures spanning a coverage range from 1 per 17 to 1 per 15 substrate atoms. In accompanying first-principles density-functional theory calculations we show the essential role of van der Waals interactions in estimating the variation in anthracene adsorption energy and height across the sample. We can thereby evaluate the compression of the anthracene film in terms of continuum elastic properties, which results in an effective Young's modulus of 1.5 GPa and a Poisson ratio approximate to 0.1. These values suggest interpretation of the molecular monolayer as a porous material-in marked congruence with our microscopic observations.
adsorption
Dept Phys
Sweden.
2
College Pk
SE-41296 Gothenburg
scanning-tunneling-microscopy
density-functional theory
stress
MD
Kwangmoo
Einstein
T. L.] Univ Maryland
pentacene
benzene
[Kim
cu(111)
growth
Author
D. Z. Sun
D. H. Kim
D. Le
O. Borck
Kristian Berland
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory
K. Kim
W. H. Lu
Y. M. Zhu
M. M. Luo
J. Wyrick
Z. H. Cheng
T. L. Einstein
T. S. Rahman
Per Hyldgaard
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory
L. Bartels
Physical Review B - Condensed Matter and Materials Physics
1098-0121 (ISSN)
Vol. 82 20Areas of Advance
Nanoscience and Nanotechnology
Materials Science
Subject Categories (SSIF 2011)
Physical Sciences
Atom and Molecular Physics and Optics
Condensed Matter Physics
Roots
Basic sciences
DOI
10.1103/PhysRevB.82.201410