M. Takizawa et al., Change of tube diameter distribution of single-wall carbon nanotubes induced by changing the bimetallic ratio of Ni and Y catalysts, CHEM P LETT, 326(3-4), 2000, pp. 351-357
The effect of Ni and Y concentrations in bimetallic Ni-Y catalyst on single
-wall carbon nanotube (SWNT) generation is studied. When we added small amo
unt of Y with the order of 0.1 atomic % (at%) against C, the generation rat
e of soot in are discharge was enhanced by a factor of 2-3 as compared with
that of only C. Addition of Ni well enhanced the generation of SWNTs. The
tube diameter distribution was controlled by changing Y concentration (0-9.
0 at%), but was not sensitive to Ni concentration (0.2-3.0 at%). The mean t
ube diameter was increased with increasing Y concentration. (C) 2000 Publis
hed by Elsevier Science B.V.