Comment on "Single-Crystals of Single-Walled Carbon
Nanotubes Formed by Self-Assembly"
M. F. Chisholm, Y. Wang, A. R. Lupini, G. Eres, A. A. Puretzky, B. Brinson,
A. V. Melechko, D. B. Geohegan, H. Cui, M. P. Johnson, S. J. Pennycook, D.
H. Lowndes, S. Arepalli, C. Kittrell, S. Sivaram, M. Kim, G. Lavin, J. Kono,
R. Hauge, and R. E. Smalley
Science 300, 1236b (2003) Download
PDF file (308 kB)
Schlittler et al. (1) reported the production of single crystals of single-walled carbon nanotubes (SWCNTs) by the thermolysis of nanopatterned structures of alternating layers of C60 and nickel. Electron diffraction, high-resolution phase contrast imaging, and electron energy loss spectroscopy (EELS) were used to characterize the resulting crystals. In this comment, we report the reproduction of their experimental results; however, we disagree with their interpretation of the data. We suggest that the crystals formed in our experiments consist not of SWCNTs, but rather of calcium molybdenum oxide. ©2003 The American Association for the Advancement of Science.