Diamond structures grown from polymer composite nanofibers

0391263 - FZÚ 2014 CZ eng A - Abstract
Potocký, Štěpán - Kromka, Alexander - Babchenko, Oleg - Rezek, Bohuslav - Martinová, L. - Pokorný, P.
Diamond structures grown from polymer composite nanofibers.
Development of Materials Science in Research and Education, Book of Abstracts of the 22nd Joint Seminar. Praha: Czechoslovak Association for Crystal Growth (CSACG), 2012 - (Kožíšek, Z.; Nitsch, K.). s. 57-57. ISBN 978-80-260-2357-9.
[Joint Seminar – Development of materials science in research and education /22./. 03.09.2012-07.09.2012, Lednice]
R&D Projects: GA ČR GAP205/12/0908
Institutional research plan: CEZ:AV0Z10100521
Keywords : nanocrystalline diamond * chemical vapour deposition * composite polymer * nanofiber sheet * SEM
Subject RIV: BM - Solid Matter Physics ; Magnetism

Needle-less electro-spinning of poly(vinyl alcohol) water solution with ultra dispersed diamond powder (UDD) is used as the nucleation treatment for achieving growth of thin nanocrystalline diamond films. The growth is realized by standard microwave plasma chemical vapor deposition with focused plasma reactor. The morphology and character of deposited film is strongly related to the density of composite nanofiber textile and growth temperature. The low temperature process (430 °C) results in a growth of foam like structure with voids in films. The high temperature process (660 °C) results in growth of well faceted diamond crystals and continuous films with 3D structure. Reactive ion etching of composite nanofiber textile prior to diamond deposition confirmed growth of isolated diamond nanofibers. An optimized fabrication of complex hierarchically structured films is possible by density of fiber net (micro-roughness) and by density of UDD and fiber diameter (modulated nano-roughness).
Permanent Link: http://hdl.handle.net/11104/0220365