Raman scattering study of double-wall carbon nanotubes derived from the chains of fullerenes in single-wall carbon nanotubes

Characteristics of bamboo defects in peapod-grown double-walled carbon nanotubes

“…1 One particular use of peapods is the synthesis of double-walled carbon nanotubes ͑DWCNTs͒: by annealing peapods the fullerenes within the host nanotube slowly coalesce and transform into an inner nanotube. 2 The formation of the inner tubes has been confirmed by Raman spectroscopy. 3,4 However, there is a major difference between such peapod-grown DWCNTs and other ͑e.g., chemical-vapor deposition grown͒ DWCNTs: NMR measurements on peapod-grown DWCNT samples have shown that the inner shells of such tubes exhibit a nearly uniformly metallic spin relaxation, 5 suggesting that all inner tubes are metallic.…”

X-ray diffraction as a tool for the determination of the structure of double-walled carbon nanotube batches

“…7 and 8͒ or electric arc plasmas 9 and the "peapod conversion" route. 3,10 The first route allows the direct catalyst-assisted synthesis of DWCNTs from the decomposition of carbonaceous gas precursors ͑CCVD͒ or the sublimation of graphite anodes ͑arc discharge͒. Specifically, the CCVD method is suited to largescale synthesis 7 and is therefore very promising for the development of applications involving DWCNTs.…”

Nanoscale pressure effects in individual double-wall carbon nanotubes

“…1,2 Double-wall carbon nanotubes ͑DWCNTs͒, which is the simplest form of multiwall carbon nanotubes, 3,4 give the opportunity to determine the influence of the environment of the external wall while using the internal wall as a reference. The internal wall experiences a smaller stress due to shielding by the external wall.…”