Paper Title:
Simultaneous Growth of MWCNTs at Different Temperatures in a Variable Gradient Furnace
  Abstract

Multi-walled carbon nanotubes (MWCNTs) have been grown, simultaneously at different temperatures (600 °C, 700 °C, 725 °C, and 750 °C), by thermal chemical vapour deposition (CVD) of acetylene (C2H2) gas, in ammonia (NH3) atmosphere. The samples have been characterized morphologically by scanning electron microscopy (SEM) and a structurally by Raman spectroscopy. These analyses show that, when the temperature of substrate increases, the CNT average diameter and the density distribution decrease, and the CNTs are less defective. However there is a temperature limit (725 °C) for CNT growth. We have grown CNTs onto Si3N4/Si substrates with Pt electrodes, in order to realize the gas sensing devices. The CNTs grown at 725 °C, exhibit a fast response and a high sensitivity to NO2 gas.

  Info
Periodical
Solid State Phenomena (Volume 154)
Edited by
Marcin Leonowicz and Dariusz Oleszak
Pages
77-82
DOI
10.4028/www.scientific.net/SSP.154.77
Citation
V. Grossi, A. Urbani, A. Giugni, C. Cantalini, S. Santucci, M. Passacantando, "Simultaneous Growth of MWCNTs at Different Temperatures in a Variable Gradient Furnace", Solid State Phenomena, Vol. 154, pp. 77-82, 2009
Online since
April 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Tsuyoshi Ueda, Md. Mosharaf Hossain Bhuiyan, H. Norimatsu, S. Katsuki, Tomoaki Ikegami
Abstract:Carbon nanotube (CNT) gas sensors for NOx gas detection were prepared. CNTs were grown on an Al2O3 substrate with interdigital Pt-electrodes...
1253
Authors: Dan Dan Zhao, Zhi Yang, Hao Wei, Ya Fei Zhang
Abstract:Low-pressure chemical vapor deposition (LP-CVD) technique has been utilized for controlled growth of carbon nanotube (CNT) arrays on silicon...
11
Authors: Jiang Lei Lu, Guang Long Wang, Lian Feng Sun, Feng Qi Gao, Fang Yu, Hai Qing Zhou, Gang Wang
Chapter 1: Materials Design
Abstract:Carbon nanotube (CNT) films were one-step catalytically synthesized on silicon substrates by the premixed ethanol flame (PEF). Ferric nitrate...
569
Authors: M. Pérez-Cadenas, A. Maroto-Valiente, I. Rodríguez-Ramos, A. Guerrero-Ruíz
Abstract:Carbon nanotubes are grown by catalytic chemical vapour deposition over components of electronic devices. Samples are analyzed by...
157
Authors: Mohd Asyadi Azam, Mohd Warikh Abd Rashid, Kazuki Isomura, Akihiko Fujiwara, Tatsuya Shimoda
Abstract:Al oxide (Al-O) films used as catalyst-support layer for vertical growth of carbon nanotubes (CNTs) were characterized by means of X-ray...
213