Author/Authors :
Zhu، نويسنده , , Y.Q and Hsu، نويسنده , , W.K and Firth، نويسنده , , S and Terrones، نويسنده , , M and Clark، نويسنده , , R.J.H and Kroto، نويسنده , , H.W and Walton، نويسنده , , D.R.M، نويسنده ,
Abstract :
Nb-doped WS2 nanotubes, typically W1−xNbxS2 (x⩽0.2), generated by heating Nb2O5-coated W18O49 nanorods in H2S at 1100°C, contain more structural defects within the layers than do pure WS2 nanotubes. The tube tips are invariably closed. The presence of Nb appears to inhibit nanotube formation. A two-stage process is proposed to account for the observed doped nanotube growth.
