TiO2 Nanotube Arrays of 1000 m Length by Anodization of Titanium Foil: Phenol Red Diffusion

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• 作者：Maggie Paulose ; Haripriya E. Prakasam ; Oomman K. Varghese ; Lily Peng ; Ketul C. Popat ; Gopal K. Mor ; Tejal A. Desai ; Craig A. Grimes
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：October 18, 2007
• 年：2007
• 卷：111
• 期：41
• 页码：14992 - 14997
• 全文大小：644K
• 年卷期：v.111,no.41(October 18, 2007)
• ISSN：1932-7455

文摘

We report for the first time fabrication of self-aligned hexagonally closed-packed titania nanotube arrays ofover 1000 m in length and aspect ratio 10 000 by potentiostatic anodization of titanium. We describe aprocess by which such thick nanotube array films can be transformed into self-standing, flat or cylindrical,mechanically robust, polycrystalline TiO₂ membranes of precisely controlled nanoscale porosity. The self-standing membranes are characterized using Brunauer-Emmett-Teller surface area measurements, glancingangle X-ray diffraction, and transmission electron microscopy. In initial application, such membranes areused to control the diffusion of phenol red.