Carbon microtubes: tuning internal diameters and conical angles.

  title={Carbon microtubes: tuning internal diameters and conical angles.},
  author={Gopinath Bhimarasetti and John Cowley and Mahendra Sunkara},
  volume={16 7},
In this paper, we report a synthesis strategy for a new class of hollow, curved carbon morphologies, 'carbon microtubes' (CMTs), with absolute control over their conical angles and internal diameters. Our synthesis methodology employs nitrogen or oxygen dosing to change the wetting behaviour of gallium metal with the growing carbon walls to tune the conical angles. Increasing N(2) concentrations in the gas phase during growth increases the conical angles of CMTs from +25° to about -20°. A… CONTINUE READING