Potassium titanate nanorod arrays grown on titanium substrates and their in vitro bioactivity

Yongxing Liu, Kanji Tsuru, Satoshi Hayakawa, Akiyoshi Osaka

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A novel approach to fabricating highly-oriented, nm-scale potassium titanate K2Ti6O13 rod arrays on titanium substrates was demonstrated. The fabrication process was template-free, and simply involved coating the titanium substrates with pulverized potassium metaborate and its derivatives, and subsequent heating at 700°C for 5 h. When the samples were soaked in hot water, the coating layers were readily removed, leaving an array of titanate crystallites on the titanium substrates. Even the slightest change in the composition of the potassium borates resulted in various microstructures, while K2O·1.03B2O 3 yielded highly-oriented nanorod arrays of K2Ti 6O13. Bioactivity of the as-achieved nanorod arrays was proved by the deposition of apatite in simulated body fluid (SBF: Kokubo solution). When soaked in SBF, the K2Ti6O13 nanorod arrays deposited apatite within one day accompanying the release of potassium ions from the crystallites into SBF and the arrays were covered with apatite layers in three days. Ion exchange between the potassium ions in the crystal and calcium ions in SBF is proposed as the mechanism operative to favor the deposition of apatite.

Original languageEnglish
Pages (from-to)634-640
Number of pages7
JournalJournal of the Ceramic Society of Japan
Volume112
Issue number1312
DOIs
Publication statusPublished - Jan 1 2004

Fingerprint

Apatites
Bioactivity
Titanium
Nanorods
nanorods
Potassium
Apatite
potassium
titanium
apatites
Substrates
Ions
Crystallites
Coatings
Borates
crystallites
Body fluids
ions
coatings
Ion exchange

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Potassium titanate nanorod arrays grown on titanium substrates and their in vitro bioactivity. / Liu, Yongxing; Tsuru, Kanji; Hayakawa, Satoshi; Osaka, Akiyoshi.

In: Journal of the Ceramic Society of Japan, Vol. 112, No. 1312, 01.01.2004, p. 634-640.

Research output: Contribution to journalArticle

Liu, Yongxing ; Tsuru, Kanji ; Hayakawa, Satoshi ; Osaka, Akiyoshi. / Potassium titanate nanorod arrays grown on titanium substrates and their in vitro bioactivity. In: Journal of the Ceramic Society of Japan. 2004 ; Vol. 112, No. 1312. pp. 634-640.
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