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Fabrication of tapered, conical-shaped titania nanotubes

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Abstract

Using anodic oxidation with a time-dependent linearly varying anodization voltage, we have made films of tapered, conical-shaped titania nanotubes. The tapered, conical-shaped nanotubes were obtained by anodizing titanium foil in a 0.5% hydrofluoric acid electrolyte, with the anodization voltage linearly increased from 10-23 V at rates varying from 2.0-0.43 V/min. The linearly increasing anodization voltage results in a linearly increasing nanotube diameter, with the outcome being an array of conical-shaped nanotubes approximately 500 nm in length. Evidence provided by scanning electron-microscope images of the titanium substrate during the initial stages of the anodization process enabled us to propose a mechanism of nanotube formation.

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Authors and Affiliations

  1. Department of Electrical Engineering, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA

    G. K. Mor & Oomman K. Varghese

  2. Sentechbiomed Corporation, State College, Pennsylvania, 16803, USA

    Maggie Paulose, Niloy Mukherjee & Craig A. Grimes

Authors
  1. G. K. Mor
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  2. Oomman K. Varghese
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  3. Maggie Paulose
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  4. Niloy Mukherjee
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  5. Craig A. Grimes
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Correspondence to Craig A. Grimes.

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Mor, G.K., Varghese, O.K., Paulose, M. et al. Fabrication of tapered, conical-shaped titania nanotubes. Journal of Materials Research 18, 2588–2593 (2003). https://doi.org/10.1557/JMR.2003.0362

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  • DOI: https://doi.org/10.1557/JMR.2003.0362

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