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Composite nanofibers formed at low temperature by plasma deposition

Ana Borras Angel Barranco Francisco Yubero Agustin R. González-Elipe 1

1. Instituto de Ciencia de Materiales de Sevilla (ICMSE), Avda. Americo Vespucio, 49, Sevilla 41092, Spain


Ag-TiO2 nanofibers (three μm long, 30-150 nm thick) constituted by a single-crystalline silver wire (20-30 nm thickness) and an external layer of amorphous TiO2 are prepared at 403 K by oxygen plasma activation of a silver substrate followed by plasma deposition of TiO2. Thicker fibers of crystalline anatase around the silver wire were prepared when plasma deposition occurs at 523 K. The formation mechanism of these micro and nano-fibers supported on the substrate is discussed and a nobel volcano-type mechanism proposed for the formation of these composite nanofibers. The effect of plasma and the high mobility of the silver are key factors determining the formation of the fibers. Preliminary results on the formation of nanofibers of other oxides (SiO2, ZnO) by plasma deposition are shown and their formation mechanism discussed.


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Related papers

Presentation: Poster at E-MRS Fall Meeting 2006, Symposium A, by Agustin R. González-Elipe
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-15 14:55
Revised:   2009-06-07 00:44