Mo1−W S2 nanotubes and related structures

(NH4)2MoS4 and (NH4)2WS4 form solid solutions over the entire composition range. Nanotubes of Mo1−x W x S2 solid solutions have been prepared by employing these solid solutions precursors. Thus, the thermal decomposition of (NH4)2Mo1−x W x S4 in an inert or a hydrogen atmosphere yields Mo1−x W x S2 nanotubes, those with x<0.1 being more readily obtained. The nanotubes exhibit novel tip architectures and defects. Single-walled nanotubes have also been observed in some samples.