Purification of rhodium-filled carbon nanotubes using reversed micelles

Single-walled carbon nanotubes filled with M OH (M = K, Cs) and then washed and refilled with clusters and molecules

“…2 Indeed selective removal of material from the exterior of such filled MWNTs cannot be readily achieved and special methods, for example, inverse micelles have been employed as washing agents. 4 In contrast, many filled SWNT samples retain their filling material despite vigorous attempts to remove the filling. For example, samples of KI@SWNT remain unchanged after being refluxed in water in a Soxhlet apparatus for three days or washing in cold water for 90 days.…”

Filling Single-Walled Carbon Nanotubes with Lutetium Chloride: A Sustainable Production of Nanocapsules Free of Nonencapsulated Material

“…42 The presence of defects could result in the release of the encapsulated payload, which is indeed undesirable in the present study. On the other hand we also disregarded the use of surfactants or organic solvents, which have for instance been employed for the purification of filled SWCNTs [23][24] since the aim was to develop an environmentally friendly protocol. This drove us to the use of boiling water, which is a "green" innocuous solvent, for the cleaning of the non-encapsulated salt.…”

Chapter 29. Fullerene chemistry

“…7). 294 Treatment of the tubes with rhodium trichloride and H, produces The functionalisation of carbon nanotubes by reaction with H,S04-HNU, is reported to produce highly functionaiised tubes with SO,H, OH and other groups present.298 Individual carbon nanotubes are estimated to have an exceptionally high Young's modulus, in the terapascal (TPa) range, by measuring the amplitude of their intrinsic thermal vibrations in a transmission electron microscope.299 A realistic many-body potential, continuum shell model predicts that nanotubes subjected to large deformations reversibly switch into different morphological patterns.300 Four-probe measurements on single nanotubes show that each multi-she11 tube has unique conductivity properties; both metallic and non-metallic behaviour is observed.301 Sharp jumps in conductivity are found as the temperature is varied and there is a much greater difference between the electricaI properties of each nanotube than e~pected.~" Another study of the resistivities of carbon nanotubes shows that the most structurally perfect tubes have resistivities an order of magnitude lower than those previously found and that defects in the structure of the tube cause substantial increases in resistivity.30z A strong negative magneto-resistance and a fa11 in resistance with increasing temperature has been reported in a two-probe measurement of conductance of a non-annealed A metalIic carbon nanotube ( 5 3 ) with a diameter…”