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Structural and tribological properties of cluster-assembled CNx films
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
2007 (English)In: Applied Physics A: Materials Science & Processing, ISSN 0947-8396, E-ISSN 1432-0630, Vol. 87, 767-772 p.Article in journal (Refereed) Published
Abstract [en]

We report the structural and tribological characterization of nanostructured CNx thin films produced by the deposition of a supersonic carbon cluster beam assisted by nitrogen ion bombardment. The influence of the depsotion parameters on the chemical composition and structure of the films has been systematically studied by X-ray photoelectron spectroscopy, elastic recoil detection analysis, transmission electron microscopy and atomic force microscopy. Depending on the deposition parameters, the films show a stucture ranging from amorphous to disordered graphitic with interlinked planes. Nitrogen content depends on the nitrogen ion kinetic energy. The films have a very low density with a high surface roughness. Friction measurements at the nanoscale show a correlation between nitrogen content and mechanical properties.

Place, publisher, year, edition, pages
Springer Science , 2007. Vol. 87, 767-772 p.
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-49666DOI: 10.1007/s00339-007-3898-8ISI: 000245964300030OAI: oai:DiVA.org:su-49666DiVA: diva2:379171
Note
Authors - beyond those already mentioned at Stockholm University - include: M. Blomqvist, G. Bongiorno, A. Podesta, V. Serin, G. Abrasonis, U. Kreissig, W. Möller, E. Coronel, V. Casina, P. Piseri, P. Milani.Available from: 2010-12-17 Created: 2010-12-17 Last updated: 2017-12-11Bibliographically approved
In thesis
1. Analytical Electron Microscopy Studies for Development of New Carbon Based Materials
Open this publication in new window or tab >>Analytical Electron Microscopy Studies for Development of New Carbon Based Materials
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The thesis presents transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) studies of new carbon based materials synthesized with two different techniques. In the first project, nitrogen is incorporated into carbon nanostructures by supersonic cluster beam deposition (SCBD) to favor the formation of curved and cross-linked structures, ultimately aiming at creating a material with high hardness combined with good elasticity. The second project deals with nanoporous carbon derived from various carbides (VC, WB, NbC, TaC, HfC, ZrC and TiC) synthesized at temperatures ranging from 700 to 1200 °C, ultimately aiming at creating a porous material with large surface area and narrow poor size distribution. In both projects, the results of different synthesis conditions are investigated with the help of high resolution TEM and EELS. Structural and chemical information about the samples is extracted and it is found that it is possible to alter the nanostructure depending on the synthesis conditions. The thesis ends with implementation and evaluation of Gold’s iterative deconvolution method for enhanced energy resolution in EEL spectra. Relevant background about the chemical elements, transmission electron microscopy and electron energy loss spectroscopy is included in the introductory chapters.

Place, publisher, year, edition, pages
Stockholm: Department of Physics, Stockholm University, 2010. 136 p.
Keyword
TEM, EELS, CNx thin films, Carbide derived carbons, Gold deconvolution, Resolution improvement
National Category
Physical Sciences
Research subject
Physics
Identifiers
urn:nbn:se:su:diva-49549 (URN)978-91-7447-191-5 (ISBN)
Public defence
2011-01-21, sal FA32, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 10:00 (English)
Opponent
Supervisors
Available from: 2010-12-29 Created: 2010-12-15 Last updated: 2010-12-17Bibliographically approved

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