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Crystallized TiO2 Nanosurfaces in Biomedical Applications.

Metka Benčina1, Aleš Iglič2,3, Miran Mozetič1

  • 1Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.

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|June 11, 2020
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Summary

Crystallization of titanium dioxide (TiO2) nanosurfaces impacts their biological performance. This review explores rapid crystallization techniques and their effects on TiO2 crystal phases for biomedical applications.

Keywords:
biocompatibilitycrystalline phasenanostructuresurface modificationtitanium oxide

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Surface Chemistry

Background:

  • Titanium dioxide (TiO2) crystallization significantly affects its bio-performance in biomedical applications.
  • Anatase and rutile phases are preferred over amorphous TiO2 for enhanced functionality.
  • Conventional furnace annealing is common, but faster alternatives are sought.

Purpose of the Study:

  • To review various crystallization techniques for nanostructured TiO2 surfaces.
  • To investigate the influence of TiO2 crystal phase on biological response.
  • To highlight plasma-induced crystallization methods as rapid alternatives.

Main Methods:

  • Review of literature on TiO2 crystallization techniques.
  • Focus on hydrothermal, room temperature, plasma electrolytic oxidation (PEO), and oxygen plasma treatments.
  • Emphasis on electrochemically anodized nanotube arrays.

Main Results:

  • Plasma-induced techniques, including oxygen plasma treatment, offer rapid TiO2 crystallization (seconds).
  • Crystal phase (anatase, rutile) is controllable by plasma conditions.
  • Anatase and rutile phases demonstrate superior bio-performance compared to amorphous TiO2.

Conclusions:

  • Rapid crystallization methods are crucial for advancing TiO2-based biomedical applications.
  • Understanding crystal phase-bio-performance relationships guides material selection.
  • Nanostructured TiO2, particularly nanotube arrays, shows promise for medical devices.