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Eur. Phys. J. Appl. Phys. 46, 20403 (2009)
DOI: 10.1051/epjap/2009038
Evaluation of organic sub-monolayers by X-ray based measurements under gracing incident conditions
O. Werzer1, B. Stadlober2, A. Haase2, H.-G. Flesch1 and R. Resel11 Institute of Solid State Physics, Graz University of Technology, Graz, Austria
2 Institute of Nanostructured Materials and Photonics, Joanneum Research Forschungsgesellschaft mbH, Weiz, Austria
o.werzer@gmx.at
Received: 16 September 2008 / Received in final form: 20 November 2008 / Accepted: 20 January 2009 / Published online: 27 March 2009
Abstract
The structural investigations of model organic systems
like pentacene on silicon oxide in the monolayer regime is very
important for the basic understanding of initial nucleation process
together with the electronic performance of transistor devices. A
method for the evaluation of the island formation and layer closing
of the first monolayer is introduced. The method is based on
specular X-ray reflectivity and diffuse scattering and reveal
integral information on the coverage together with the size and
separation of pentacene islands. The results are in good agreement
with AFM investigation that encourages the use of this type of
investigation in in-situ experiments.
61.05.cc - Theories of X-ray diffraction and scattering.
61.05.cm - X-ray reflectometry (surfaces, interfaces, films).
61.43.Hv - Fractals; macroscopic aggregates (including diffusion-limited aggregates).
68.35.bm - Polymers, organics.
© EDP Sciences 2009
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