| Issue |
J. Phys. Colloques
Volume 50, Number C8, Novembre 1989
36th International Field Emission Symposium
|
|
|---|---|---|
| Page(s) | C8-243 - C8-246 | |
| DOI | https://doi.org/10.1051/jphyscol:1989841 | |
36th International Field Emission Symposium
J. Phys. Colloques 50 (1989) C8-243-C8-246
DOI: 10.1051/jphyscol:1989841
Institute of Physical Chemistry, University of Bonn, Wegelerstrasse 12, D-5300 Bonn 1, F.R.G.
J. Phys. Colloques 50 (1989) C8-243-C8-246
DOI: 10.1051/jphyscol:1989841
ON THE SURFACE MORPHOLOGY UNDERLYING NFIM IMAGES OBTAINED WITH TETRACYANOETHYLENE
R. SCHMITZ et F.W. RÖLLGENInstitute of Physical Chemistry, University of Bonn, Wegelerstrasse 12, D-5300 Bonn 1, F.R.G.
Abstract
The ring structures and dynamic phenomena observed in field ion microscopy with negative ions (NFIM) of tetracyanoethylene (TCNE) are interpreted as ion images of a surface layer grown by field-induced polymerization of the image gas molecules. The ring structures are attributed to the formation of mobile surface elevations by the field stress on the polymer layer. These small surface elevations combined with larger surface deformations, generated by the field stress and resulting from elastic properties of the bulk of the layer, explain many features of NFIM such as the clustering of rings and compression of ring structures.