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Title: The influence of potassium on the growth of ultra-thin films of para-hexaphenyl on muscovite mica(001)

Abstract

The interaction of potassium with mica(001) and its influence on the subsequent film growth of para-hexaphenyl (6P) was studied by Auger electron spectroscopy, thermal desorption spectroscopy, and atomic force microscopy (AFM). Freshly cleaved mica is covered with 0.5 monolayer (ML) of potassium. By intentional potassium deposition in ultra-high vacuum a saturation of 1 ML can be achieved, which is stable up to 1000 K. Additional potassium desorbs at around 350 K. The film morphology of 6P on mica(001) is significantly influenced by the potassium monolayer. On the freshly cleaved mica surface, which contains 1/2 ML of K, 6P forms needle-like islands which are composed of lying molecules. On the fully potassium covered mica surface 6P grows in form of dendritic islands, composed of standing molecules. The reason for this change is attributed to the removal of lateral electric fields which exist on the freshly cleaved mica surface, due to the specific arrangements of the atoms in the surface near region of mica.

Authors:
; ;  [1]
  1. Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz (Austria)
Publication Date:
OSTI Identifier:
22100658
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 137; Journal Issue: 13; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ATOMIC FORCE MICROSCOPY; AUGER ELECTRON SPECTROSCOPY; DENDRITES; DESORPTION; INTERACTIONS; MORPHOLOGY; MUSCOVITE; POTASSIUM; SURFACES; THIN FILMS; VACUUM COATING

Citation Formats

Putsche, Bernhard, Tumbek, Levent, and Winkler, Adolf. The influence of potassium on the growth of ultra-thin films of para-hexaphenyl on muscovite mica(001). United States: N. p., 2012. Web. doi:10.1063/1.4754833.
Putsche, Bernhard, Tumbek, Levent, & Winkler, Adolf. The influence of potassium on the growth of ultra-thin films of para-hexaphenyl on muscovite mica(001). United States. https://doi.org/10.1063/1.4754833
Putsche, Bernhard, Tumbek, Levent, and Winkler, Adolf. Sun . "The influence of potassium on the growth of ultra-thin films of para-hexaphenyl on muscovite mica(001)". United States. https://doi.org/10.1063/1.4754833.
@article{osti_22100658,
title = {The influence of potassium on the growth of ultra-thin films of para-hexaphenyl on muscovite mica(001)},
author = {Putsche, Bernhard and Tumbek, Levent and Winkler, Adolf},
abstractNote = {The interaction of potassium with mica(001) and its influence on the subsequent film growth of para-hexaphenyl (6P) was studied by Auger electron spectroscopy, thermal desorption spectroscopy, and atomic force microscopy (AFM). Freshly cleaved mica is covered with 0.5 monolayer (ML) of potassium. By intentional potassium deposition in ultra-high vacuum a saturation of 1 ML can be achieved, which is stable up to 1000 K. Additional potassium desorbs at around 350 K. The film morphology of 6P on mica(001) is significantly influenced by the potassium monolayer. On the freshly cleaved mica surface, which contains 1/2 ML of K, 6P forms needle-like islands which are composed of lying molecules. On the fully potassium covered mica surface 6P grows in form of dendritic islands, composed of standing molecules. The reason for this change is attributed to the removal of lateral electric fields which exist on the freshly cleaved mica surface, due to the specific arrangements of the atoms in the surface near region of mica.},
doi = {10.1063/1.4754833},
url = {https://www.osti.gov/biblio/22100658}, journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 13,
volume = 137,
place = {United States},
year = {2012},
month = {10}
}