NDLI: Electrical conduction mechanism in Fe$_{70}$Pd$_{30}$ catalyzed multi-walled carbon nanotubes

Content Provider	Springer Nature Link
Author	Aggarwal, Monika Husain, M. Khan, Samina Khan, Zishan H.
Copyright Year	2007
Abstract	Carbon nanotubes (CNTs) are synthesized by the catalytic decomposition of acetylene using low pressure chemical vapour deposition method (LPCVD) at 800 °C and at a chamber pressure of 10 Torr over a supported catalyst film of Fe$_{70}$Pd$_{30}$. Morphology of these CNTs is studied using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and High Resolution Transmission Electron Microscopy (HRTEM). From HRTEM image of these multi-walled carbon nanotubes (MWNTs), it is clear that these MWNTs do not possess a co-axial cylindrical structure, but are composed of imperfect and broken graphite cylinders of different sizes. The average diameter and length of the nanotubes varies between 20–70 nm and 5–60 μm respectively. Electrical transport measurements of these MWNTs are studied over a temperature range of 298–4.2 K. The results have been interpreted in terms of variable-range hopping (VRH) over the entire temperature range of 298–4.2 K. Three-dimensional variable-range hopping (VRH) is suggested for the temperature range (298–125 K), while two-dimensional VRH is observed for the temperature range (125–4.2 K).
Starting Page	1047
Ending Page	1055
Page Count	9
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	9
Issue Number	6
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-01-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	carbon nanotubes electrical transport variable range hopping SEM TEM Applied Optics, Optoelectronics, Optical Devices Physical Chemistry Characterization and Evaluation of Materials Inorganic Chemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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