Chalcogenide Cobalt telluride nanotubes

Cobalt telluride nanotubes are grown using wet chemical and hydrothermal syntheses. Wet chemical synthesized nanotubes display nearly 1: 1 Co to Te ratio. On the other hand, CoTe nanotubes synthesized using hydrothermal method show excess Co content leading to the compound Co$_{\mathrm{58}}$Te$_{\mathrm{42}}$. Both CoTe and Co$_{\mathrm{58}}$Te$_{\mathrm{42}}$ display magnetic properties, but with totally different characteristics. The Curie temperature of CoTe is higher than 400 K. However, the T$_{\mathrm{c}}$ of Co$_{\mathrm{58}}$Te$_{\mathrm{42}}$ is below 50 K. Transport properties of cobalt telluride (CoTe) nanotube devices show that they exhibit p-type semiconducting behavior. The magnetoresistance measured at 10 K show a magnetoresistance of 54{\%}. .