Empirical kinetics for the growth of titania nanotube arrays by potentiostatic anodization in ethylene glycol
Author
Cortes, Francisco Javier Quintero
Arias-Monje, Pedro Jose
Phillips, Jonathan
Zea, Hugo
Date
2015Metadata
Show full item recordAbstract
The goal of this research was to describe the effects of the main anodization variables on the
morphology of the resulting titania nanotube arrays. Four variables were considered in this study:
applied voltage, fluoride and water concentrations, and time. The first three variables were studied
simultaneously in a central composite design of experiments using SEM measurements of tube
length as the response variable. The effect of time was modeled using transferred charge as the
response variable. A field assisted oxidation-dissolution growth model was validated over a broad
range of experimental conditions under which tube growth can be accurately predicted directly
from the current transients using Faraday’s laws. The effects of anodization variables were
described based on this model and a simple, empirical kinetic expression was obtained and
successfully tested against data from other authors with fairly small errors over a broad range of
conditions.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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