The study of the filling behaviour of carbon nanotubes using the radioactive-trace technique

Abstract

The washing and elution behaviour of carbon nanotubes (CNTs), following soaking in radioactive (125I)NaI and (110mAg)AgNO3 solutions, was investigated using the radioactive-trace technique. High-resolution electron microscopy and x-ray energy dispersive spectroscopy observations showed the validity of filling CNTs with soluble inorganic salts using this simple method. A great difference in the release of (125I)NaI and (110mAg)AgNO3 from CNTs was found and discussed in terms of the chemical transformation occurring in CNT cavities. The amount of the filled materials was also estimated using the radioactive-trace technique.

Crystallization of 2H and 4H PbI2 in Carbon Nanotubes of Varying Diameters and Morphologies

“…Filled carbon nanotubes CNTs have been envisaged as potential drug-delivery media . This implies that it must be possible to fill them with biologically active materials (e.g., radionuclides) and then release the filling. The first attempts to empty KI- or ZrCl 4 -filled arc-synthesized SWNTs 24 were unsuccessful, and only the extraneous material could readily be removed, even after long-term washings in boiling aqueous media.…”