Microplasma-based synthesis of vertically aligned metal oxide nanostructures

Vertically aligned metal oxide nanostructures (e.g., wires, needles, pillars and trees) of CuO, PdO and NiO were synthesized on several substrates (e.g., Si and ITO (indium tin oxide)) using a high-pressure (∼Torr) microplasma-based growth technique. Organometallic precursors were dissociated in the...

Full description

Saved in:
Bibliographic Details
Published in:Nanotechnology 2012-10, Vol.23 (42), p.425603-1-7
Main Authors: Koh, Travis L, O'Hara, Evan C, Gordon, Michael J
Format: Article
Language:English
Subjects:
ADHESION
Alignment
CATHODES
COMPOSITES
COPPER OXIDE
CUPRIC OXIDE
DISLOCATIONS
Indium tin oxide
Metal oxides
MICROSTRUCTURES
Nanocomposites
Nanomaterials
Nanostructure
OXIDES
PLASMAS
Silicon substrates
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Vertically aligned metal oxide nanostructures (e.g., wires, needles, pillars and trees) of CuO, PdO and NiO were synthesized on several substrates (e.g., Si and ITO (indium tin oxide)) using a high-pressure (∼Torr) microplasma-based growth technique. Organometallic precursors were dissociated in the hollow cathode region of a supersonic plasma jet creating a directed flux of metal species (e.g., atoms, metastables, etc) which react with an oxygen background to form crystalline metal oxide films having a variety of nanomorphologies. Spiral-like growth fronts were seen in some cases for CuO, suggesting that nanowire growth may involve screw dislocations. Large area, nanowire films >1 cm2 with good adhesion and electrical connection to ITO substrates were deposited by raster-scanning a single jet. Details of the microplasma operation, the dynamics of the growth process and the resulting materials are discussed.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/23/42/425603