Diamond structures grown from polymer composite nanofibers

0425744 - FZÚ 2014 RIV US eng J - Článek v odborném periodiku
Potocký, Štěpán - Kromka, Alexander - Babchenko, Oleg - Rezek, Bohuslav - Martinová, L. - Pokorný, P.
Diamond structures grown from polymer composite nanofibers.
Advanced Science, Engineering and Medicine. Roč. 5, č. 6 (2013), s. 519-521. ISSN 2164-6627
Grant CEP: GA ČR GAP108/12/0910; GA ČR GAP205/12/0908
Institucionální podpora: RVO:68378271
Klíčová slova: chemical vapour deposition * composite polymer * nanocrystalline diamond * nanofiber sheet * SEM
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Needle-less electro-spinning of poly(vinyl alcohol) (PVA) water solution with ultra dispersed diamond powder (UDD) is used as the nucleation treatment for achieving growth of thin NCD films. The growth is realized by standard microwave plasma chemical vapor deposition (CVD) 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 controlling density of fiber net and by optimal density of UDD and fiber diameter.
Trvalý link: http://hdl.handle.net/11104/0231555