Evolution of catalyst particle size during carbon single walled nanotube growth and its effect on the tube characteristics
Cited 22 times inCited 0 times in
- Evolution of catalyst particle size during carbon single walled nanotube growth and its effect on the tube characteristics
- Harutyunyan, Avetik R.; Tokune, Toshio; Mora, Elena; Yoo, Jung-Woo; Epstein, Arthur J.
- Issue Date
- AMER INST PHYSICS
- JOURNAL OF APPLIED PHYSICS, v.100, no.4, pp.1 - 8
- A series of Fe catalysts, with different mean diameters, supported on alumina with different molar ratios, was studied before and after carbon single walled nanotubes growth using magnetic measurements and Raman scattering techniques (laser excitation wavelengths from 1.17 to 2.54 eV) to follow changes on catalyst particle size and composition, as well as the relationship between particle size and diameter of nanotubes grown. In all cases, an increase and redistribution of the particle size after the growth was concluded based on the blocking temperature values and Langevin function analysis. This is explained in terms of agglomeration of particles due to carbon-induced liquefaction accompanied with an increase in the catalyst mobility. For large particles no direct correlation between the catalyst size and the nanotube diameters was observed.
- ; Go to Link
- Appears in Collections:
- MSE_Journal Papers
- Files in This Item:
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.