Record Details

Ni and Ni/Pt filling inside multiwalled carbon nanotubes

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Ni and Ni/Pt filling inside multiwalled carbon nanotubes
 
Creator SINGH, MK
TITUS, E
TYAGI, PK
PALNITKAR, U
MISRA, DS
ROY, M
DUA, AK
COJOCARU, CS
LE NORMAND, F
 
Subject chemical-vapor-deposition
single-wall
nickel carbide
electron-diffraction
room-temperature
probe microscopy
raman-scattering
diamond
surface
growth
multiwall carbon nanotubes
ni and ni/pt filling
hrtem
raman spectroscopy
 
Description Multiwalled carbon nanotubes are grown by microwave plasma chemical vapor deposition with CH, and H-2 as precursor gases. Ni and Ni/Pt electroplated layers are used as catalysts for the synthesis of the tubes. We observe that a very efficient filling of the tubes takes place with Ni. In some cases Ni/Pt filling is also observed inside the tubes. High-resolution transmission electron microscopy (HRTEM) studies, coupled with energy-dispersive X-ray analyses of the tubes, indicate Ni nanorods with a highly symmetrical cylindrical structure. The diameter of the cylindrical nanorods is on the order of 40 nm, and their length is 660 nm. The nano area diffraction pattern of the nanorods reveals the cubic structure of nickel, and electron diffraction spots corresponding to (111), (200), (220) planes are evident. The lattice constant of Ni measured from the diffraction spots was found to be 0.347 +/- 0.0013 nm. This should be compared with 0.352 nm, the value of "a" in bulk Ni. The decrease in the lattice constant may be due to the strain experienced inside the tubes. Raman spectroscopy shows the typical signature of the tangential breathing mode present in the tubes at 1580 cm(-1) that shifts to a new position when the C-12 is replaced by C-13. The shift, however, is too small and is difficult to explain on the basis of mass difference. HRTEM experiments indicate the presence of Ni3C in the samples dominantly in the interfacial region.
 
Publisher AMER SCIENTIFIC PUBLISHERS
 
Date 2011-07-17T03:24:40Z
2011-12-26T12:50:05Z
2011-12-27T05:36:04Z
2011-07-17T03:24:40Z
2011-12-26T12:50:05Z
2011-12-27T05:36:04Z
2003
 
Type Article
 
Identifier JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 3(1-2), 165-170
1533-4880
http://dx.doi.org/10.1166/jnn.2003.200
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4603
http://hdl.handle.net/10054/4603
 
Language en