Effect of Anodization Process Parameters on Morphology of Porous Anodic Aluminum Oxide and Carbon Nanotubes Grown by CVD

Autor/innen

  • M. K. Kushwaha
  • Harleen Kaur
  • Dr. Priyavrat Thareja Head, Materials and Metallurgical Engineering department, PEC University of Technology, Chandigarh, 160012 India

Schlagwörter:

Porous anodic aluminum oxide (PAAO), pore diameter, CNTs (carbon nanotubes), chemical vapor deposition (CVD)

Abstract

Synthesis of well-ordered carbon nanotubes (CNTs) can be achieved by chemical vapor deposition (CVD) of a carbon source onto a porous anodic aluminum oxide (PAAO) template. The structure of the PAAO template or film is a close-packed array of hexagonal cells, each containing a cylindrical central pore that is perpendicular to the surface of the underlying aluminum substrate. The diameter, depth and spacing between pores can be tailored by altering the anodization process parameters. A two-step anodization method was developed in the mid-nineties to get near-perfect honeycomb like hexagonal ordering in the pore arrangement, which has been also used in this work. Anodization was carried out in diluted phosphoric acid electrolyte and later CNTs were developed within the nanopores of PAAO using chemical vapor deposition (CVD). Acetylene gas was used as a carbon source and the CVD was carried out with catalyst embedding in the nanopores. The effect of PAAO structure obtained by pretreatment and using various anodization process parameters, e.g., applied voltage/current density, temperature, concentration and pH of the electrolyte, etc., on the growth and morphology of PAAO and subsequently CNTs grown within pores has been studied. This study clearly shows that the PAAO morphology is very important for ordered growth of CNTs. Diameter and length of the CNTs vary directly with the diameter and depth of the pores of the PAAO for pore diameter 100 nm and above. The PAAO characteristics were examined by FE-SEM and analysis was done using Image-J software. The produced CNTs were characterized by FE-SEM with EDAX facility and HR-TEM. This systematic study will help in devising a method of template synthesis for controlled growth of CNTs which is expected to assist in the development of high-density vertically oriented well-ordered CNT-based nanodevices. Keywords: Porous anodic aluminum oxide (PAAO), pore diameter, CNTs (carbon nanotubes), chemical vapor deposition (CVD)

Autor/innen-Biografie

  • Dr. Priyavrat Thareja, Head, Materials and Metallurgical Engineering department, PEC University of Technology, Chandigarh, 160012 India
    Heads Materials and Metallurgical Engineering department,PEC University of Technology. Member Editorial board, Indian Foundry Journal. Was meber Ed board, Powder Metallurgy, Quality International Journal from 1987 to 1993.Has innovated in Technical poetry, and authored elucidating Materials and Metallurgical Engineering processes and concepts.a certified, Lean Six Sigma Black Belt. An IRCA approved Lead Tutor and certified Auditor and in both QMS and EMS, he has promoted Value Auditing, and helped several industries in improving competence (through a tool ‘COMpro’. He was a part of special group of TC 176- which developed ANSI/ASQ/ISO 9001:20xx Education Management Standard presently under publication at Geneva. He is a TS 16949 Tier II supplier provisional auditor etc. He heads Materials and Metallurgical Engineering at PEC University of Technology, and also a Principal Programme Coordinator of the Total Quality Engineering and Management cell.

Downloads

Veröffentlicht

2011-12-16

Ausgabe

Bd. 1 Nr. 3 (2011)

Rubrik

Research Articles

Lizenz

Declaration and Copyright Transfer Form

(to be completed by authors)

 

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

·         I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.

·         I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).

·         I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.

·          I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. _______________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.