Change of tube diameter distribution of single-wall carbon nanotubes induced by changing the bimetallic ratio of Ni and Y catalysts

Takizawa M; Bandow S; Yudasaka M; Ando Y; Shimoyama H; Iijima S

Chemical Physics Letters, Vol.326, No.3-4, 351-357, 2000

DOI10.1016/S0009-2614(00)00817-4 Export Citation

Change of tube diameter distribution of single-wall carbon nanotubes induced by changing the bimetallic ratio of Ni and Y catalysts

Takizawa M, Bandow S, Yudasaka M, Ando Y, Shimoyama H, Iijima S

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 amount of Y with the order of 0.1 atomic % (at%) against C, the generation rate 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 tube diameter was increased with increasing Y concentration.