Vibration atomic layer deposition for conformal nanoparticle coating

A vibration atomic layer deposition reactor was developed for fabricating a conformal thin-film coating on nanosize particles. In this study, atomic layer deposition of 10–15-nm-thick Al2O3 films was conducted on a high-surface-area acetylene black powder with particle diameters of 200–250 nm. Inten...

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Bibliographic Details
Published in:Journal of vacuum science & technology. A, Vacuum, surfaces, and films Vacuum, surfaces, and films, 2014-01, Vol.32 (1)
Main Authors: Park, Suk Won, Woo Kim, Jun, Jong Choi, Hyung, Hyung Shim, Joon
Format: Article
Language:English
Subjects:
ACETYLENE
AGGLOMERATION
ALUMINIUM OXIDES
CHEMISORPTION
COATINGS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DEPOSITION
DIFFUSION
LAYERS
NANOSTRUCTURES
PARTICLES
POWDERS
PRECURSOR
SURFACE AREA
SURFACES
THIN FILMS
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Summary:A vibration atomic layer deposition reactor was developed for fabricating a conformal thin-film coating on nanosize particles. In this study, atomic layer deposition of 10–15-nm-thick Al2O3 films was conducted on a high-surface-area acetylene black powder with particle diameters of 200–250 nm. Intense vibration during the deposition resulted in the effective separation of particles, overcoming the interparticle agglomeration force and enabling effective diffusion of the precursor into the powder chunk; this phenomenon led to the formation of a conformal film coating on the nanopowder particles. It was also confirmed that the atomic layer deposition Al2O3 films initially grew on the high-surface-area acetylene black powder particles as discrete islands, presumably because chemisorption of the precursor and water occurred only on a few sites on the high-surface-area acetylene black powder surface. Relatively sluggish growth of the films during the initial atomic layer deposition cycles was identified from composition analysis.
ISSN:0734-2101
1520-8559
DOI:10.1116/1.4845735