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A Study of Anodization Time and Voltage Effect on the Fabrication of Self- Ordered Nano Porous Aluminum Oxide Films: A Gas Sensor Application

Published online by Cambridge University Press:  13 June 2012

Ildeman Abrego ,
Alfredo Campos ,
Gricelda Bethancourt  and
E. Ching-Prado
Ildeman Abrego
Affiliation:
Department of Natural Science, Faculty of Science and Technology, Technologic University of Panama, Republic of Panama
Alfredo Campos
Affiliation:
Department of Natural Science, Faculty of Science and Technology, Technologic University of Panama, Republic of Panama
Gricelda Bethancourt
Affiliation:
Department of Natural Science, Faculty of Science and Technology, Technologic University of Panama, Republic of Panama
E. Ching-Prado*
Affiliation:
Department of Natural Science, Faculty of Science and Technology, Technologic University of Panama, Republic of Panama
*
*Corresponding Author e mail: eleicer.ching@utp.ac.pa
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Abstract

The effect of time and voltage on the fabrication of self ordered nano porous aluminum oxide structure is studied. A two-step anodization process in 0.4M sulphuric acid and at low temperature was used to prepare structure with pore diameter between 20 to 29 nm. The surface morphology, including porous structure mainly, is characterized using scanning electron microscopy. Pore density 1010 to 1011 cm-2 is found. Thickness and electrical response are performed to these films. Capacitive sensor measurements for different water concentration are presented and discussed. The gas sensibility dependences with pore diameter and thickness layer are also reported.

Keywords

electrochemical synthesisporositysensor
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1449: Symposium BB – Solution Synthesis of Inorganic Films and Nanostructured Materials , 2012 , mrss12-1449-bb03-19
Copyright
Copyright © Materials Research Society 2012

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References

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