Tungsten–niobium–sulfur composite nanotubesElectronic supplementary information (ESI) available: HRTEM image of a typical 10-layered W0.9Nb0.1S2 nanotube, layer separation = 0.62 nm and Raman bands of W0.9Nb0.1S2 and WS2 nanotubes and their assignments. See http://www.rsc.org/suppdata/cc/b0/b007074m/
Abstract
Novel W–Nb–S composite inorganic nanotubes have been generated by replacing W in the S–W–S sandwich layers of WS2 by Nb. The tubes are uniform, with the Nb concentration 10 atom%. Raman spectral features of the tubes are described.