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 K 2Ti 6O 13 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 K 2O·1.03B 2O 3 yielded highly-oriented nanorod arrays of K 2Ti 6O 13. 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 K 2Ti 6O 13 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
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume112
Issue number1312
Publication statusPublished - Dec 2004

Fingerprint

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

Keywords

  • Apatite
  • Bioactivity
  • Nanorod array
  • Potassium metaborate
  • Potassium titanate
  • Titanium

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

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

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 112, No. 1312, 12.2004, p. 634-640.

Research output: Contribution to journalArticle

@article{e409bccb5c9f4f2886a2a35cd2142901,
title = "Potassium titanate nanorod arrays grown on titanium substrates and their in vitro bioactivity",
abstract = "A novel approach to fabricating highly-oriented, nm-scale potassium titanate K 2Ti 6O 13 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 K 2O·1.03B 2O 3 yielded highly-oriented nanorod arrays of K 2Ti 6O 13. 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 K 2Ti 6O 13 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.",
keywords = "Apatite, Bioactivity, Nanorod array, Potassium metaborate, Potassium titanate, Titanium",
author = "Yongxing Liu and Kanji Tsuru and Satoshi Hayakawa and Akiyoshi Osaka",
year = "2004",
month = "12",
language = "English",
volume = "112",
pages = "634--640",
journal = "Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan",
issn = "1882-0743",
publisher = "Ceramic Society of Japan/Nippon Seramikkusu Kyokai",
number = "1312",

}

TY - JOUR

T1 - Potassium titanate nanorod arrays grown on titanium substrates and their in vitro bioactivity

AU - Liu, Yongxing

AU - Tsuru, Kanji

AU - Hayakawa, Satoshi

AU - Osaka, Akiyoshi

PY - 2004/12

Y1 - 2004/12

N2 - A novel approach to fabricating highly-oriented, nm-scale potassium titanate K 2Ti 6O 13 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 K 2O·1.03B 2O 3 yielded highly-oriented nanorod arrays of K 2Ti 6O 13. 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 K 2Ti 6O 13 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.

AB - A novel approach to fabricating highly-oriented, nm-scale potassium titanate K 2Ti 6O 13 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 K 2O·1.03B 2O 3 yielded highly-oriented nanorod arrays of K 2Ti 6O 13. 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 K 2Ti 6O 13 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.

KW - Apatite

KW - Bioactivity

KW - Nanorod array

KW - Potassium metaborate

KW - Potassium titanate

KW - Titanium

UR - http://www.scopus.com/inward/record.url?scp=11844259478&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=11844259478&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:11844259478

VL - 112

SP - 634

EP - 640

JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan

JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan

SN - 1882-0743

IS - 1312

ER -