Detail publikace

Role of step edges on the structure formation of α-6T on Ag(441)

WAGNER, T. FRITZ, D. RUDOLFOVÁ, Z. ZEPPENFELD, P.

Originální název

Role of step edges on the structure formation of α-6T on Ag(441)

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Controlling the orientation of organic molecules on surfaces is important in order to tune the physical properties of the organic thin films and, thereby, increase the performance of organic thin film devices. Here, we present a scanning tunneling microscopy (STM) and photoelectron emission microscopy (PEEM) study of the deposition of the organic dye pigment α-sexithiophene (α-6T) on the vicinal Ag(441) surface. In the presence of the steps on the Ag(441) surface, the α -6T molecules exclusively align parallel to the step edges oriented along the [1View the MathML source0]-direction of the substrate. The STM results further reveal that the adsorption of the α-6T molecules is accompanied by various restructuring of the substrate surface: Initially, the molecules prefer the Ag(551) building blocks of the Ag(441) surface. The Ag(551) termination of the terraces is then changed to a predominately Ag(331) one upon completion of the first α-6T monolayer. When closing the two layer thick wetting layer, the original ratio of Ag(331) and Ag(551) building blocks ( ≈ 1:1) is recovered, but a phase separation into microfacets, which are composed either of Ag(331) or of Ag(551) building blocks, is found.

Klíčová slova

α-sexithiophene; Ag(441); Vicinal surface; PEEM; STM; Growth

Autoři

WAGNER, T.; FRITZ, D.; RUDOLFOVÁ, Z.; ZEPPENFELD, P.

Vydáno

20. 9. 2017

Nakladatel

Elsevier

Místo

https://doi.org/10.1016/j.susc.2017.09.008

ISSN

0039-6028

Periodikum

Surface Science

Ročník

667

Číslo

1

Stát

Nizozemsko

Strany od

17

Strany do

24

Strany počet

8

URL

https://doi.org/10.1016/j.susc.2017.09.008

BibTex

@article{BUT140820,
  author="Thorsten {Wagner} and Daniel Roman {Fritz} and Zdena {Rudolfová} and Peter {Zeppenfeld}",
  title="Role of step edges on the structure formation of α-6T on Ag(441)",
  journal="Surface Science",
  year="2017",
  volume="667",
  number="1",
  pages="17--24",
  doi="10.1016/j.susc.2017.09.008",
  issn="0039-6028",
  url="https://doi.org/10.1016/j.susc.2017.09.008"
}