Written by  Erika

The Effect of Al Buffer Layer on the Catalytic Synthesis of Carbon Nanotube Forests

New publications by University of Oulu on The Effect of Al Buffer Layer on the Catalytic Synthesis of Carbon Nanotube Forests. More information about the article:











Original Paper

Topics in Catalysis

October 2015, Volume 58, Issue 14, pp 1112-1118

First online: 18 August 2015



This study aims to reveal the effect of an Al buffer layer on the catalytic synthesis of carbon nanotube (CNT) forests. Thin films of Al buffer with thicknesses of 2, 5, 10, and 20 nm were deposited on copper, brass, stainless steel, Inconel® 600, silicon and alumina substrates under an Fe catalyst layer of 1 nm thickness. CNTs were synthesized from acetylene using hydrogen as a reducing gas at 660 °C in a low pressure chemical vapor deposition system. Vertically well-aligned CNTs were obtained on all substrates when an Al buffer layer of at least 10 nm was applied. The structure of the Al buffer layer and the nanotube forests were studied using scanning electron microscopy, atomic force microscopy and Raman spectroscopy. The effect of the Al buffer layer on the electrical properties of the substrate–buffer–catalyst–nanotube structures was evaluated by current–voltage measurements. Supercapacitor devices constructed from the nanotube forests grown on various types of conductive substrates were also studied. The specific capacitance of the double-layer capacitor electrodes was found to be ~10 F/g which is in the same range that we have measured in the absence of an Al buffer layer.


Metal substrate Carbon nanotube growth Chemical vapor deposition Electrical applications Supercapacitors
  • O. Pitkänen
  • G. S. Lorite
  • G. Shi
  • A.-R. Rautio
  • A. Uusimäki
  • R. Vajtai
  • G. Tóth
  • ,K. Kordás 
The Effect of Al Buffer Layer on the Catalytic Synthesis of Carbon Nanotube Forests
Topics in Catalysis 
Volume 58, Issue 14-17 , pp 1112-1118 

Cover Date
Print ISSN
Online ISSN
Springer US
Additional Links
  • Metal substrate
  • Carbon nanotube growth
  • Chemical vapor deposition
  • Electrical applications
  • Supercapacitors
Industry Sectors
Author Affiliations
  • 1. Microelectronics and Materials Physics Laboratories, Department of Electrical Engineering, University of Oulu, 90570, Oulu, Finland
  • 2. Department of Material Science and NanoEngineering, Rice University, Houston, TX, 77005, US


Last modified on Friday, 17 June 2016 08:03
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