Abstract
We describe the first elaboration of carbon nanotube tips (CN-tips) by the sol–gel technique. The CN-tips consist of single carbon nanotubes (CNs) or bundles sheathed by a nanometric layer of TiO 2 fixed to the apex of a W base tip and oriented along its major axis. The straight-forward method potentially permits low cost batch fabrication. Structural analysis has been realized by transmission electron microscopy (TEM). These CN-tips are interesting for applications in applied surface science such as field emission (FE) sources and near field microscopy probes. A first field emission study has also been carried out showing that the TiO 2 layer does not block FE. Relatively stable emission at voltages usual to FE from CNs at up to 0.8 μA current were obtained.
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