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The van der Waals Interactions of n ‐Alkanethiol‐Covered Surfaces: From Planar to Curved Surfaces
Author(s) -
Cometto Fernando P.,
Luo Zhi,
Zhao Shun,
OlmosAsar Jimena A.,
Mariscal Marcelo M.,
Ong Quy,
Kern Klaus,
Stellacci Francesco,
Lingenfelder Magalí
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201708735
Subject(s) - van der waals force , planar , curvature , electrochemistry , materials science , nanoparticle , chemical physics , adsorption , nanotechnology , molecule , chemistry , geometry , electrode , organic chemistry , computer graphics (images) , mathematics , computer science
The van der Waals (vdW) interactions of n ‐alkanethiols (ATs) adsorbed on planar Au(111) and Au(100) surfaces and curved Au nanoparticles of different diameters are reported. By means of electrochemical measurements and molecular dynamic calculations, the increase in the average geometrical curvature of the surface influences the global interactions, that is, decreasing vdW interactions between neighboring molecules. Small NPs do not present the same electrochemical behavior as planar surfaces. The transition between nanoparticle to flat surface electrochemical response is estimated to occur at a circa 13–20 nm diameter range.