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@ARTICLE{Kakudate:825798,
author = {Kakudate, Toshiyuki and Tsukamoto, Shigeru and Kubo, Osamu
and Nakaya, Masato and Nakayama, Tomonobu},
title = {{E}lectronic {S}tructures of {Q}uaterthiophene and
{S}eptithiophene on {C}u(111): {S}patial {D}istribution of
{A}dsorption-{I}nduced {S}tates {S}tudied by {STM} and {DFT}
{C}alculation},
journal = {The journal of physical chemistry / C},
volume = {120},
number = {12},
issn = {1932-7455},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2017-00100},
pages = {6681 - 6688},
year = {2016},
abstract = {The oligothiophene molecule family has a tunable energy gap
between the highest occupied and lowest unoccupied molecular
orbitals (HOMO and LUMO) as the function of the number of
thiophene units. This tunability is of great use to
controlling carrier injection at the molecule/electrode
interface in molecule-based electronic devices. We
investigate quaterthiophene (4T) and septithiophene (7T)
molecules adsorbed on Cu(111) surfaces by scanning tunneling
microscopy and spectroscopy (STM and STS) at room
temperature. Both oligothiophene molecules form
one-dimensional (1D) chain structures on Cu(111), and each
molecule in the 1D structures is observed as a row of bright
ovals corresponding to thiophene units. Observed features of
4T and 7T molecules differ from those expected from the HOMO
and LUMO of the free-standing molecules, and
density-functional calculations of a 4T molecule together
with a Cu(111) surface reproduce the experimental STM images
as they reflect characteristic spatial distribution of
adsorption-induced states. In other words, the
adsorption-induced states are spatially protruding out from
the molecule and not completely localized in the space
between the molecule and the Cu(111) surface.},
cin = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
ddc = {540},
cid = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
$I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
pnm = {142 - Controlling Spin-Based Phenomena (POF3-142) / 143 -
Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-142 / G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000373416500044},
doi = {10.1021/acs.jpcc.6b00566},
url = {https://juser.fz-juelich.de/record/825798},
}