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Morphology and structure transitions of copper hexadecafluorophthalocyanine (F16CuPc) thin films
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Yang, J. L., Schumann, Stefan and Jones, T. S.. (2010) Morphology and structure transitions of copper hexadecafluorophthalocyanine (F16CuPc) thin films. Journal of Physical Chemistry C, Vol.114 (No.2). pp. 1057-1063. ISSN 1932-7447
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Official URL: http://dx.doi.org/10.1021/jp908330n
Abstract
The thickness-dependent morphology and Structure transitions of pristine and thermally annealed F16CuPc thin films deposited from the vapor phase by organic molecular beam deposition have been studied with use of atomic force microscopy, scanning electron microscopy, and X-ray diffraction. Pristine films show clear morphology transitions with increasing thickness, changing from spherical-like crystals to flexible-fiber-like crystals via standing-up needle-like crystals. Two different roughening processes are identified: kinetic roughening for films <30 nm thick (scaling exponent, beta approximate to 0.123) and rapid roughening for films >= 30 nm thick (beta approximate to 3.089). Thicker pristine films ire composed of two crystal layers: a spherical-crystal layer and a flexible-fiber-crystal layer. Controlled thermal annealing leads to further reorganization of the packing geometry and large crystals dominate the resulting film morphology. Mechanisms are proposed for the structure and morphology transitions.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QD Chemistry T Technology T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Science > Chemistry |
| Journal or Publication Title: | Journal of Physical Chemistry C |
| Publisher: | American Chemical Society |
| ISSN: | 1932-7447 |
| Date: | 21 January 2010 |
| Volume: | Vol.114 |
| Number: | No.2 |
| Number of Pages: | 7 |
| Page Range: | pp. 1057-1063 |
| Identification Number: | 10.1021/jp908330n |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) |
| URI: | http://wrap.warwick.ac.uk/id/eprint/16631 |
Data sourced from Thomson Reuters' Web of Knowledge
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