TY  - JOUR
AU  - Kakudate, T.
AU  - Tsukamoto, S.
AU  - Nakaya, M.
AU  - Nakayama, T.
TI  - Initial stage of adsorption of octithiophene molecules on Cu(111)
JO  - Surface science
VL  - 605
SN  - 0039-6028
CY  - Amsterdam
PB  - Elsevier
M1  - PreJuSER-17658
PY  - 2011
N1  - This work was supported in part by the World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics, MEXT, Japan. T. N acknowledges the support of Grant-in-Aid for Scientific Research (A) (No. 22241030-2).
AB  - The initial stage of the adsorption of octithiophene (8T) molecules on a Cu(111) surface is investigated using a scanning tunneling microscope at room temperature. We find a characteristic molecular chain structure of 8T molecules on a terrace of the Cu(111) surface, which has not been reported so far for adsorption of oligothiophene molecules on metal surfaces. Up to the adsorption of 0.26 monolayer (ML), 81 molecules in the molecular chain align with their long axis parallel to the Cu < 11-2 > direction. With increasing coverage, there appear 8T molecules that align with their long axis parallel to the Cu < 110 > direction. The appearance of different molecular orientations is understood by the decrease of the number of the adsorption sites for extending the molecular chains. Fragments of 8T molecules, such as single thiophene molecules, are also observed in this work. They are trapped only at the step edges of the Cu(111) surface at the beginning and later trapped in a small Cu(111) region surrounded by 8T molecules. (C) 2011 Elsevier B.V. All rights reserved.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000291176200007
DO  - DOI:10.1016/j.susc.2011.02.024
UR  - https://juser.fz-juelich.de/record/17658
ER  -