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Effect of anodization conditions on the synthesis of TiO2 nanopores

Published online by Cambridge University Press:  01 February 2011

Subhasish Chatterjee ,
Miriam Ginzberg  and
Bonnie Gersten
Subhasish Chatterjee
Affiliation:
subhas1012@yahoo.com, The Graduate Center of CUNY and Queens College, Chemistry, 65-30 Kissena Blvd, Remsen 206, Flushing, NY, 11367, United States, 718-9974231, 718-997-5531
Miriam Ginzberg
Affiliation:
mbginz@yahoo.com, Queens College, Chemistry, 65-30 Kissena Blvd., Flushing, NY, 11367, United States
Bonnie Gersten
Affiliation:
bonniegersten@gmail.com, Queens College, Chemistry, 65-30 Kissena Blvd., Flushing, NY, 11367, United States
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Abstract

Nanoporous structures play a promising role in the development of nanomechanical, nanoelectrical and biosensing devices. In addition, nanopores can be utilized as chemical and gas sensors. TiO2 is a semiconductor material, which can have a wide range of applications in nanopore-based sensors. In this study, TiO2 nanopores were prepared by electrochemical anodization. Titanium was used as the anode, while platinum was used as the cathode in an electrochemical cell filled with a hydrofluoric acid electrolyte solution. During the preparation process, titanium was converted to its oxide form. Nanostructures were synthesized under varying physical conditions, including HF concentrations of 0.5-10% and anodization times of 5-30 minutes. The resulting nanopore structures were characterized by scanning electron microscopy (SEM). With a progressive increase in HF concentration (from 0.5% to 10%), the diameter of the nanopores decreased, from approximately 100 nm in diameter to 50 nm. The nanopores showed a transformation from tube-like structures to pore networks with increased HF concentration or anodization time. The results show that the dimensions and morphology of the nanopores can be controlled by alteration of the anodization conditions.

Keywords

nanostructureTiscanning electron microscopy (SEM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 951: Symposium E – Nanofunctional Materials, Nanostructures and Novel Devices for Biological and Chemical Detection , 2006 , 0951-E09-27
Copyright
Copyright © Materials Research Society 2007

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