Carbon nanotube coating on titanium substrate modified with TiO2 nanotubes

Yu Bai; Ilsong Park; Taesung Bae; Kyounga Kim; Fumio Watari; Motohiro Uo; Minho Lee

doi:10.1007/s11595-011-0327-9

Journal of Wuhan University of Technology Materials Science Edition ›› 2011, Vol. 26 ›› Issue (5) : 867 -871. DOI: 10.1007/s11595-011-0327-9

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Carbon nanotube coating on titanium substrate modified with TiO₂ nanotubes

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Abstract

A combination of carbon nanotubes (CNTs) and titanium (Ti) modified with TiO₂ nanotubes (TiO₂ NTs) was fulfilled with the aim of improving bioactivity of Ti implant. First, well-ordered TiO₂ NTs were prepared by the electrochemical anodization of Ti in an ethylene glycol electrolyte containing 1 wt% NH₄F and 10 wt% H₂O at 20 V for 50 min, followed by annealing. Then, the carboxylated CNTs were coated onto the TiO₂ NTs using electrophoretic deposition (EPD) technique. The growth of hydroxyapatite (HA) on the samples was investigated by soaking them in simulated body fluid (SBF). The result showed the CNTs-coated Ti with the modification of TiO₂ NTs (CNTs-TiO₂ NTs) was more efficient to induce HA formation than the CNTs-coated smooth Ti (CNTs-Ti). The vitro cell response was evaluated using osteoblast cells (MC3T3-E1). The good cell proliferation and strong cell adhesion could be obtained on the CNTs-TiO₂ NTs. These results indicated that CNT coating on the Ti modified with TiO₂ NTs could be potentially useful for the periodontal ligament combination on dental implants.

Keywords

carbon nanotubes / TiO₂ nanotubes / apatite-forming ability / cell adhesion

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Yu Bai, Ilsong Park, Taesung Bae, Kyounga Kim, Fumio Watari, Motohiro Uo, Minho Lee. Carbon nanotube coating on titanium substrate modified with TiO₂ nanotubes. Journal of Wuhan University of Technology Materials Science Edition, 2011, 26(5): 867-871 DOI:10.1007/s11595-011-0327-9

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