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Multi-Layer Coating of Ultrathin Polymer Films on Nanoparticles of Alumina by a Plasma Treatment

Published online by Cambridge University Press:  17 March 2011

Donglu Shi ,
Zhou Yu ,
S. X. Wang ,
Wim J. van Ooij ,
L. M. Wang  and
J. G. Zhao
Donglu Shi
Affiliation:
Dept. of Nuclear Engineering and Radiological Science, University of Michigan Ann Arbor, MI 48109
Zhou Yu
Affiliation:
Dept. of Nuclear Engineering and Radiological Science, University of Michigan Ann Arbor, MI 48109
S. X. Wang
Affiliation:
Department of Materials Science and Engineering, University of Cincinnati Cincinnati, OH 45221-0012
Wim J. van Ooij
Affiliation:
Dept. of Nuclear Engineering and Radiological Science, University of Michigan Ann Arbor, MI 48109
L. M. Wang
Affiliation:
Department of Materials Science and Engineering, University of Cincinnati Cincinnati, OH 45221-0012
J. G. Zhao
Affiliation:
Dept. of Nuclear Engineering and Radiological Science, University of Michigan Ann Arbor, MI 48109
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Abstract

Multi-layer ultrathin polymer films have been deposited on the surfaces of nanoparticles of alumina using a plasma polymerization treatment. The nanoparticles ranged from 10-150 nm in spherical shapes. High-resolution transmission electron microscopy (HRTEM) experiments showed that an extremely thin film of the pyrrole layer (10-20 Å) was uniformly deposited on the surfaces of the nanoparticles. In particular, the particles of all sizes (10-150 nm) exhibited equally uniform ultrathin films indicating well-dispersed nanoparticles in the fluidized bed during the plasma treatment. After single layer coating, hexamethyldisiloxane (HMDSO) was coated again as a second layer onto the surface of pyrrole. Subsequently, a third layer of pyrrole was coated on the top of HMDSO film completing the multi-layer coating process. Time-of-Flight Secondary ion mass spectroscopy (TOFSIMS) experiments confirmed the deposition of these multi-layer thin films on the nanoparticles. The deposition mechanisms and the effects of plasma treatment parameters are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 635: Symposium C – Anisotropic Nanoparticles-Synthesis, Characterization & Applications , 2001 , C4.28
Copyright
Copyright © Materials Research Society 2001

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