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Vapor-Phase Functionalization of Nanostructured Gradient-Index Titanium Dioxide Thin Films

Published online by Cambridge University Press:  01 February 2011

Andy C. van Popta ,
John J. Steele ,
Shufen Tsoi ,
Enrico Fok ,
Jonathan G. C. Veinot ,
Michael J. Brett  and
Jeremy C. Sit
Andy C. van Popta
Affiliation:
vanpopta@ualberta.ca, University of Alberta, Electrical and Computer Engineering, 9107-116 Street, Edmonton, Alberta, T6G 2V4, Canada, 780-492-7926, 780-492-2863
John J. Steele
Affiliation:
jjsteele@ece.ualberta.ca, University of Alberta, Electrical and Computer Engineering, 9107-116 Street, Edmonton, Alberta, T6G 2V4, Canada
Shufen Tsoi
Affiliation:
stsoi@ece.ualberta.ca, University of Alberta, Electrical and Computer Engineering, 9107-116 Street, Edmonton, Alberta, T6G 2V4, Canada
Enrico Fok
Affiliation:
enrico.fok@ualberta.ca, University of Alberta, Chemistry, 11227 Saskatchewan Drive, Edmonton, Alberta, T6G 2G2, Canada
Jonathan G. C. Veinot
Affiliation:
jveinot@ualberta.ca, University of Alberta, Chemistry, 11227 Saskatchewan Drive, Edmonton, Alberta, T6G 2G2, Canada
Michael J. Brett
Affiliation:
brett@ece.ualberta.ca, University of Alberta, Electrical and Computer Engineering, 9107-116 Street, Edmonton, Alberta, T6G 2V4, Canada
Jeremy C. Sit
Affiliation:
jsit@ece.ualberta.ca, University of Alberta, Electrical and Computer Engineering, 9107-116 Street, Edmonton, Alberta, T6G 2V4, Canada
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Abstract

Chemical treatments, when applied to nanostructured oxide thin films, can be used to generate added functionality in many devices. In this study, a nanostructured defect-mode optical filter was prepared by glancing angle deposition of titanium dioxide and functionalized with 3,3,3-trifluoropropyl-trichlorosilane to render the thin film insensitive to variable humidity conditions. Electrical characterization and contact angle measurements demonstrate that the hydrophilic thin film becomes hydrophobic when functionalized, and transmission measurements clearly show that the wavelength shift of the defect-mode becomes strongly inhibited for a wide range of humidity levels.

Keywords

surface chemistrynanostructurefilm
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 928: Symposium GG – Current and Future Trends of Functional Oxide Films , 2006 , 0928-GG09-15
Copyright
Copyright © Materials Research Society 2006

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