Room-temperature electronic template effect of the SmSi(111)-8x2 interface for self-alignment of organic molecules.
This work describes an innovative concept for the development of organized molecular systems based on the template effect of the pre-structured semi-conductive SmSi(111) interface. This substrate is selected because Sm deposition in the submonolayer range leads to a 8x2-reconstruction, which is a well-defined one-dimensional semi-metallic structure. Adsorption of aromatic molecules [1,4-di-(9-ethynyltriptycenyl)-benzene] on SmSi(111)- 8x2 and Si(111)-7x7 interfaces is investigated by scanning tunneling microscopy (STM) at room temperature. Density functional theory (DFT) and semi-empirical (ASED+) calculations define the nature of the molecular adsorption sites of the target molecule on SmSi as well as their self-alignment on this interface. Experimental data and theoretical results are in good agreement.
Institut FEMTO-ST, CNRS, Université de Franche-Comté, 32 Avenue de l'Observatoire, 25044 Besançon cedex, France.
Younes
Y
Makoudi
Eric
E
Duverger
Madjid
M
Arab
Frédéric
F
Chérioux
Franscisco
F
Ample
Gwénaël
G
Rapenne
Xavier
X
Bouju
Frank
F
Palmino