Zeta-potential variation of bioactive titanium metal during apatite formation on its surface in simulated body fluid

Teruyuki Himeno, Masakazu Kawashita, Hyun Min Kim, Tadashi Kokubo, Takashi Nakamura

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

Variation of surface potential of the NaOH- and heat-treated titanium metal with soaking in SBF was investigated using a laser electrophoresis zeta-potential analyzer. It was found that the surface potential of the titanium metal was negatively charged after soaking in SBF for 0.5 h, increased with increasing soaking time up to 36 h and then decreased. The negative charge of the metal at soaking time of 0.5 h is attributed to Ti-OH groups on the surface. The initial increase in the surface potential was attributed to the incorporation of positively charged calcium ions to form a calcium titanate, and the subsequent decrease was attributed to the incorporation of negatively charged phosphate ions to form an amorphous calcium phosphate, which eventually transformed into apatite.

Original languageEnglish
Pages (from-to)641-644
Number of pages4
JournalKey Engineering Materials
Volume218-220
Publication statusPublished - 2002 Jan 1
Event14th International Symposium on Ceramics in Medicine-Annual Meeting of the International Society for Ceramics in Medicine BIOCERAMICS'01 (ISCM) - Palm Springs, CA, United States
Duration: 2001 Nov 142001 Nov 17

Keywords

  • Apatite
  • Simulated body fluid (SBF)
  • Titanium
  • Zeta potential

ASJC Scopus subject areas

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

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