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Applied Physics Letters / Volume 96 / Issue 9 / BIOPHYSICS AND BIO-INSPIRED SYSTEMS

Appl. Phys. Lett. 96, 093702 (2010); http://dx.doi.org/10.1063/1.3291667 (3 pages)

Superhydrophilic TiO2 surface without photocatalytic activation

Vassilia Zorba1, Xiaobo Chen1, and Samuel S. Mao1,2

1Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
2Department of Mechanical Engineering, University of California at Berkeley, Berkeley, California 94720, USA

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(Received 30 October 2009; accepted 18 December 2009; published online 3 March 2010)

Since the discovery of extreme surface wetting phenomenon induced by ultraviolet photocatalysis, TiO2 has become the material of choice for environmental friendly applications such as self-cleaning coatings. Nevertheless, it remains a significant challenge to realize surfaces exhibiting persistent superhydrophilicity but without the need of external stimuli. We report a bioinspired TiO2 nanostructure that shows extreme superhydrophilicity without the need of light activation, and with stability against successive wetting-dewetting cycles. This ultimate TiO2 wetting surface exhibits high transmittance from near ultraviolet to the infrared, thus enabling practical antifogging technologies where transparency is critical.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

bio-inspired materials, contact angle, hydrophilicity, nanoporous materials, titanium compounds, transparency, wetting

PACS

  • 68.08.Bc

    Wetting

  • 68.03.Cd

    Surface tension and related phenomena

  • 78.20.Ci

    Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

  • 78.67.Rb

    Nanoporous materials

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3291667

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    Z. Z. Gu, A. Fujishima, and O. Sato, Appl. Phys. Lett. 85, 5067 (2004)APPLAB000085000021005067000001.

    I. Horcas, R. Fernandez, J. M. Gomez-Rodriguez, J. Colchero, J. Gomez-Herrero, and A. M. Baro, Rev. Sci. Instrum. 78, 013705 (2007)RSINAK000078000001013705000001.

    G. McHale, N. J. Shirtcliffe, S. Aqil, C. C. Perry, and M. I. Newton, Phys. Rev. Lett. 93, 036102 (2004).

    M. Mosaddeq-ur-Rahman, G. L. Yu, T. Soga, T. Jimbo, H. Ebisu, and M. Umeno, J. Appl. Phys. 88, 4634 (2000)JAPIAU000088000008004634000001.


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