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Journal of Vacuum Science & Technology A / Volume 30 / Issue 1 / Atomic Layer Deposition (ALD)

J. Vac. Sci. Technol. A 30, 01A105 (2012); http://dx.doi.org/10.1116/1.3639134 (6 pages)

Wetting properties induced in nano-composite POSS-MA polymer films by atomic layer deposited oxides

Kyle A. Vasquez1, Anita J. Vincent-Johnson2, W. Christopher Hughes2, Brian H. Augustine1, Kyoungmi Lee3, Gregory N. Parsons3, and Giovanna Scarel2

1James Madison University, Department of Chemistry and Biochemistry, Harrisonburg, Virginia 22807
2James Madison University, Department of Physics and Astronomy, Harrisonburg, Virginia 22807
3North Carolina State University, Department of Chemical and Biomolecular Engineering, Raleigh, North Carolina 27695

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(Published online 20 September 2011)

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Due to their unique properties, nano-composite polyhedral oligomeric silsequioxane (POSS) copolymer films are attractive for various applications. Here we show that their natural hydrophobic character can become hydrophilic when the films are modified by a thin oxide layer, up to 8 nm thick, prepared using atomic layer deposition. A proper choice of the deposition temperature and thickness of the oxide layer are required to achieve this goal. Unlike other polymeric systems, a marked transition to a hydrophilic state is observed with oxide layers deposited at increasing temperatures up to the glass transition temperature (∼110 °C) of the POSS copolymer film. The hydrophilic state is monitored through the water contact angle of the POSS film. Infrared absorbance spectra indicate that, in hydrophilic samples, the integral of peaks corresponding to surface Al–O (hydrophilic) is significantly larger than that of peaks linked to hydrophobic species.

© 2012 American Vacuum Society

ACKNOWLEDGMENTS

The authors thank Alan Mo and Skylar White, James Madison University–Department of Chemistry and Biochemistry, for their help with POSS-MA film deposition, and Fred Stevie of the Analytical Instrumentation Facility–North Carolina State University, for the XPS depth profiles. This work was supported by the James Madison University Center for Materials Science, the NSF-REU and Department of Defense ASSURE program (Grant No. 0851367), the NSF-RUI program (Grant No. DMR 1005641), the Research Corporation Science Department Development Grant 7957, and the Summer Research Grant 2011 from the JMU College of Sciences and Mathematics (G.S.).

Article Outline

  1. INTRODUCTION
  2. EXPERIMENT
  3. RESULTS AND DISCUSSION
  4. DISCUSSION
  5. CONCLUSIONS

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KEYWORDS and PACS

Keywords

alumina, atomic layer deposition, contact angle, glass transition, hydrophilicity, hydrophobicity, infrared spectra, nanocomposites, nanofabrication, polymer blends, polymer films, wetting

PACS

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History
Received 14 June 2011
Accepted 25 August 2011
Published online 20 September 2011
Digital Object Identifier
http://dx.doi.org/10.1116/1.3639134

PUBLICATION DATA

ISSN

0734-2101 (print)  
1520-8559 (online)

Publisher

American Vacuum Society

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