On the Rotation of the Janus CuO/CuS Colloids Formed at a Pickering Emulsion Interface

We have prepared Janus CuO/CuS colloids by a precipitation reaction in file water phase of a Pickering emulsion. The relative proportion of CuO to CuS in the Janus colloids call be tailored by variation of file polarity of the oil phase. The Janus CuO/CuS colloids (lid not rotate at the emulsion interface. Our findings are important to understand the fundamentals of Pickering emulsions and will also help in designing appropriate approaches to synthesize Janus colloids and other new materials in Pickering emulsions.