Formation of finite layer MoS2 using ultrasonic agitation

We have developed a process in which finite layer MoS2 can be produced using ultrasonic agitation. The material shows optical properties consistent with an average layer thickness of less than five layers. The process uses ultrasonic agitation of MoS2 in an suspension using isopropanol. Interestingly, side products involving carbon nanoparticles are also produced. These side products are quite small, and become the dominant material when using a centrifuge to separate out the smallest particles. These carbon nanoparticle side products appear to include nanometer scale particles as well as materials with sizes consistent with fullerenes and graphene with nanoscale lateral dimensions. This process appears to represent a novel method for producing finite layer MoS2 and some forms of carbon nanoparticles using a relatively simple method.