Reference : Non-additivity of molecule-surface van der Waals potentials from force measurements
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
http://hdl.handle.net/10993/25086
Non-additivity of molecule-surface van der Waals potentials from force measurements
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Wagner, Christian [Peter Grunberg Institut (PGI-3), Forschungszentrum Julich, 52425 Julich, Germany > > > ; ̈ Julich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Ju ̈ lich, Germany]
Fournier, Norman [Peter Grunberg Institut (PGI-3), Forschungszentrum Julich, 52425 Julich, Germany > > > ; ̈ Julich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Ju ̈ lich, Germany]
Ruiz, Victor G. [Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany]
Li, Chen [Max-Planck- Institut fur Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany]
Muellen, Klaus [Max-Planck- Institut fur Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany]
Rohlfing, Michael [Institut fur Festkorpertheorie der Universitat Munster, Wilhelm-Klemm-Strasse 10, 48149 Munster, Germany]
Tkatchenko, Alexandre mailto [Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany]
Temirov, Ruslan [Peter Grunberg Institut (PGI-3), Forschungszentrum Julich, 52425 Julich, Germany > > > ; ̈ Julich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Julich, Germany]
Tautz, F. Stefan [Peter Grunberg Institut (PGI-3), Forschungszentrum Julich, 52425 Julich, Germany > > > ; ̈ Julich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Julich, Germany]
2014
NATURE COMMUNICATIONS
NATURE PUBLISHING GROUP
5
Yes (verified by ORBilu)
International
2041-1723
MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
[en] Van der Waals (vdW) forces act ubiquitously in condensed matter. Despite being weak on an atomic level, they substantially influence molecular and biological systems due to their long range and system-size scaling. The difficulty to isolate and measure vdW forces on a single-molecule level causes our present understanding to be strongly theory based. Here we show measurements of the attractive potential between differently sized organic molecules and a metal surface using an atomic force microscope. Our choice of molecules and the large molecule-surface separation cause this attraction to be purely of vdW type. The experiment allows testing the asymptotic vdW force law and its validity range. We find a superlinear growth of the vdW attraction with molecular size, originating from the increased deconfinement of electrons in the molecules. Because such non-additive vdW contributions are not accounted for in most first-principles or empirical calculations, we suggest further development in that direction.
http://hdl.handle.net/10993/25086
10.1038/ncomms6568
Article

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