Epitaxy-driven vertical growth of single-crystalline cobalt nanowire arrays by chemical vapor deposition

Title
Epitaxy-driven vertical growth of single-crystalline cobalt nanowire arrays by chemical vapor deposition
Authors
주재범
Issue Date
2015-01
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY C, v. 3, Page. 100-106
Abstract
Highly oriented single-crystalline ferromagnetic Co nanowire (NW) arrays were synthesized on sapphire substrates via a single-step chemical vapor deposition (CVD) method. On an m-cut sapphire substrate, Co NWs were vertically grown in epitaxial relationship with the substrate without using any catalysts or templates. On an r-cut sapphire substrate, Co NWs were horizontally grown in two perpendicular directions. Furthermore, we report that the Co NWs were transformed into Co3O4 nanotubes by thermal annealing under dilute O2 conditions. Such formation of hollow structures is ascribed to favored outward diffusion of Co ions. The present vertically aligned arrays of single-crystalline Co NWs could be utilized for advanced magnetic memory applications owing to their uniform orientations.
URI
http://hdl.handle.net/20.500.11754/21524http://pubs.rsc.org/en/Content/ArticleLanding/2015/TC/C4TC01765J#!divAbstract
ISSN
2050-7526
DOI
http://dx.doi.org/10.1039/C4TC01765J
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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