[en] In this paper we present a joint experimental and theoretical approach for the study of the assembly of end-substituted oligothiophenes at surfaces with different polarities (i.e., mica vs graphite). Scanning probe microscopy studies of (sub)monolayer deposits show various types of structures (one-dimensional fibrils, two-dimensional regular layers, and monolayers), depending on the nature of the end groups and the substrate. Using molecular modeling with an atomistic approach, we focus on the interplay between the molecule-molecule (and segment-segment) interactions and the molecule-substrate interactions and their influence on the observed morphologies and the stacking geometry. Such information is relevant for controling the structural order in thin layers of thiophene oligomers for use in field-effect transistor applications, for example, by modifying the nature of dielectric material over which those compounds are deposited.
Disciplines :
Chemistry
Author, co-author :
Surin, Mathieu ; Université de Mons > Faculté des Sciences > Chimie des matériaux nouveaux
Leclère, Philippe ; Université de Mons > Faculté des Sciences > Chimie des matériaux nouveaux
De Feyter, S.
Abdel-Mottaleb, M.M.S.
De Schryver, F.C.
Henze, O.
Feast, J.W.
Lazzaroni, Roberto ; Université de Mons > Faculté des Sciences > Service de Chimie des matériaux nouveaux
Language :
English
Title :
Molecule-Molecule versus Molecule-Substrate Interactions in the Assembly of Oligothiophenes at Surfaces
Publication date :
24 November 2006
Journal title :
Journal of Physical Chemistry B
ISSN :
1520-6106
Publisher :
American Chemical Society, United States - District of Columbia
Volume :
110
Issue :
15
Pages :
7898-7908
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S817 - Chimie des matériaux nouveaux
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
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