Supramolecular π-stacked assemblies of bis(urea)-substituted thiophene derivatives and their electronic properties probed with scanning tunneling microscopy and scanning tunneling spectroscopy

被引：73

作者：

Gesquière, A

De Feyter, S

De Schryver, FC

Schoonbeek, F

van Esch, J

Kellogg, RM

Feringa, BL

机构：

[1] Katholieke Univ Leuven, Dept Chem, Lab Mol Dynam & Spect, B-3001 Heverlee, Belgium

[2] Univ Groningen, Lab Organ & Inorgan Mol Chem, NL-9747 AG Groningen, Netherlands

来源：

NANO LETTERS | 2001年 / 1卷 / 04期

关键词：

D O I：

10.1021/nl015511d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this contribution we investigated the two-dimensional (2D) supramolecular organization and electronic properties of two bis(urea)-substituted oligothiophene derivatives, containing two or three thiophene units (T2 and T3, respectively), at the solution/graphite interface with scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS). Because of the pi-stacking of the oligomers the observed zero conductance band gap in the I(V) curves of a ribbon is found to be considerably smaller than for an isolated oligothiophene molecule, indicating that there exists an effective conjugation in the pi-stacked ribbons on the surface.

引用

页码：201 / 206

页数：6

共 66 条

[1] PROBING AND INDUCING SURFACE-CHEMISTRY WITH THE STM - THE REACTIONS OF SI(111)-7X7 WITH H2O AND O2 [J].