Synthesis and Variable Temperature Electrical Conductivity Studies of Highly Ordered TiO2 Nanotubes

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Synthesis and Variable Temperature Electrical Conductivity Studies of Highly Ordered TiO2 Nanotubes

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Title: Synthesis and Variable Temperature Electrical Conductivity Studies of Highly Ordered TiO2 Nanotubes
Author: Ramanathan, Shriram; Asmatulu, Ramazan; Bell, David C.; Karthikeyan, Annamalai; Aziz, Michael

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Citation: Asmatulu, Ramaazan, Annamalai Karthikeyan, David C. Bell, Shriram Ramanathan, and Michael J. Aziz. 2009. Synthesis and variable temperature electrical conductivity studies of highly ordered TiO2 nanotubes. Journal of Materials Science 44(17): 4613-4616.
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Abstract: Rafts of aligned, high aspect ratio TiO2 nanotubes were fabricated by an electrochemical anodization method and their axial electrical conductivities were determined over the temperature range 225-400 °C. Length, outer diameter and wall thickness of the nanotubes were approximately 60-80 µm, 160 nm and 30 nm, respectively. Transmission electron microscopy studies confirmed that the TiO2 nanotubes were initially amorphous, and became polycrystalline anatase after heat treatment attemperatures as low as 250 °C in air. The activation energy for conductivity over the temperature range 250 - 350 °C was found to be 0.87 eV. The conductivity values are comparable to those of nanocrystalline and nanoporous anatase thin films reported in literature.
Published Version: doi: 10.1007/s10853-009-3703-5
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:2795734

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  • FAS Scholarly Articles [6463]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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