Charge-transfer complex study by chemical force spectroscopy: a dynamic force spectroscopic approach.
Charge-transfer interaction, as a reversible and rapid phenomenon, was evidenced by force microscopy. Pull-off forces were measured between a tip grafted with a trinitrofluorenone derivative and a surface functionalized with an electron-rich aromatic anthracene compound in a dodecane environment. The effect of the sweep time on the measured interaction forces is described, together with an extensive study of a competitive influence of free aromatic molecules in dodecane diluted solutions. These forces depend on the nature of the competitor and its concentration as well as on the velocity of tip/sample separation.
Gil
Richard
R
Equipe Catalyse Moléculaire, Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR 8182, Université Paris-Sud, Bât 420, 91405 Orsay Cedex, France.
Guillerez
Marie-George
MG
Poulin
Jean-Claude
JC
Schulz
Emmanuelle
E