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Room‐Temperature Electronic Template Effect of the SmSi(111)‐8×2 Interface for Self‐Alignment of Organic Molecules
Author(s) -
Makoudi Younes,
Duverger Eric,
Arab Madjid,
Chérioux Frédéric,
Ample Franscisco,
Rapenne Gwénaël,
Bouju Xavier,
Palmino Frank
Publication year - 2008
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200800123
Subject(s) - scanning tunneling microscope , adsorption , molecule , substrate (aquarium) , density functional theory , chemistry , chemical physics , quantum tunnelling , benzene , nanotechnology , self assembly , materials science , computational chemistry , organic chemistry , optoelectronics , oceanography , geology
Abstract 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 8×2‐reconstruction, which is a well‐defined one‐dimensional semi‐metallic structure. Adsorption of aromatic molecules [1,4‐di‐(9‐ethynyltriptycenyl)‐benzene] on SmSi(111)‐ 8×2 and Si(111)‐7×7 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.