Optimization of the production of aligned CNTs array as the gas sensing element

Mohamed Saheed, M.S. and Mohamed, N.M. and Burhanudin, Z.A. (2013) Optimization of the production of aligned CNTs array as the gas sensing element. Materials Science Forum, 756. pp. 156-163. ISSN 02555476

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Abstract

The synthesis of aligned multi-walled carbon nanotubes (MWCNTs) using thermal and floating catalytic chemical vapor deposition (CVD) method has been optimized in order to obtain MWCNTs with specific characteristics namely diameter and thickness of nanotubes array. Process parameters such as substrate preparation which involved buffer layer deposition, temperature and reaction duration were studied. Samples produced were analyzed using FESEM, HRTEM and Raman spectroscopy. Typical thickness of CNTs array obtained using thermal CVD is 38 μm whilst the ones from the floating technique have a wide range of thickness with the thickest being about 639 μm for the duration of 1 hour. Floating CVD method has the capability to produce good quality, aligned CNTs array with various thicknesses required to vary the electrode gap of the ionization-based gas sensor for the reduction of the breakdown voltage, leading to low power consumption and safe operation of the sensor. © (2013) Trans Tech Publications, Switzerland.

Item Type: Article
Additional Information: cited By 5; Conference of 3rd ISESCO International Workshop and Conference on Nanotechnology 2012, IWCN 2012 ; Conference Date: 5 December 2012 Through 7 December 2012; Conference Code:96795
Uncontrolled Keywords: Buffer layers; Carbon nanotubes; Catalysts; Gas detectors; Gas sensing electrodes; Ionization of gases; Multiwalled carbon nanotubes (MWCN); Nanocatalysts; Nanotubes, Buffer layer deposition; Catalytic chemical vapor deposition; Electrode gap; Low-power consumption; Nanotubes arrays; Process parameters; Safe operation; Substrate preparation, Chemical vapor deposition
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 09 Nov 2023 15:52
Last Modified: 09 Nov 2023 15:52
URI: https://khub.utp.edu.my/scholars/id/eprint/4006

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