Control of HAp formation and osteoconductivity on nitrogen-doped TiO2 scale formed by oxynitridation of ti

Masami Hashimoto, Satoshi Kitaoka, Yoshihiro Obata, Shunsuke Muto, Takafumi Ogawa, Maiko Furuya, Hiroyasu Kanetaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The surface potential of the TiO2 scale formed on Ti was controlled by varying the Ti heat treatment conditions in a N2 atmosphere containing a trace amount of O2. The surface potential was attributed to the effective charge of nitrogen-related defects in the TiO2, where the positive and negative surface charges were associated with (N2)0 +2 and (N)0 -1, respectively. The latter defects were formed only during the early stages of the heat treatment, and with increasing treatment time, this was followed by the formation of voids containing N2 in the scale rather than the disappearance of the defects in the TiO2 crystal lattice, resulting in zero surface charge. Hydroxyapatite (HAp) formation and osteoconductivity were enhanced on nitrogen-doped TiO2 scale with either a positive or negative surface potential. In contrast, for the unchanged TiO2 scale, no HAp formation was observed and the osteoconductivity was low.

Original languageEnglish
Title of host publicationBioceramics - 29th Symposium and Annual Meeting of the International Society for Ceramics in Medicine
EditorsChristian Rey, Christele Combes, Christophe Drouet
PublisherTrans Tech Publications Ltd
Pages86-89
Number of pages4
ISBN (Print)9783035712209
DOIs
Publication statusPublished - 2017 Jan 1
Event29th Symposium and Annual Meeting of the International Society for Ceramics in Medicine, ISCM 2017 - Toulouse, France
Duration: 2017 Oct 252017 Oct 27

Publication series

NameKey Engineering Materials
Volume758 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

Other29th Symposium and Annual Meeting of the International Society for Ceramics in Medicine, ISCM 2017
CountryFrance
CityToulouse
Period17/10/2517/10/27

Keywords

  • Hydroxyapatite
  • Nitrogen-related defect
  • Osteoconductivity
  • Surface potential
  • TiO

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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    Hashimoto, M., Kitaoka, S., Obata, Y., Muto, S., Ogawa, T., Furuya, M., & Kanetaka, H. (2017). Control of HAp formation and osteoconductivity on nitrogen-doped TiO2 scale formed by oxynitridation of ti. In C. Rey, C. Combes, & C. Drouet (Eds.), Bioceramics - 29th Symposium and Annual Meeting of the International Society for Ceramics in Medicine (pp. 86-89). (Key Engineering Materials; Vol. 758 KEM). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.758.86