Effective elastic properties of a van der Waals molecular monolayer at a metal surface
Artikel i vetenskaplig tidskrift, 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
Författare
D. Z. Sun
D. H. Kim
D. Le
O. Borck
Kristian Berland
Chalmers, Teknisk fysik, Elektronikmaterial
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, Teknisk fysik, Elektronikmaterial
L. Bartels
Physical Review B - Condensed Matter and Materials Physics
24699950 (ISSN) 24699969 (eISSN)
Vol. 82 20Styrkeområden
Nanovetenskap och nanoteknik
Materialvetenskap
Ämneskategorier
Fysik
Atom- och molekylfysik och optik
Den kondenserade materiens fysik
Fundament
Grundläggande vetenskaper
DOI
10.1103/PhysRevB.82.201410