  While alloy, core-shell and Janus binary nanoclusters are found in more and
more technological applications, their formation mechanisms are still poorly
understood, especially during synthesis methods involving physical approaches.
In this work, we employ a very simple model of such complex systems using
Lennard-Jones interactions and inert gas quenching. After demonstrating the
ability of the model to well reproduce the formation of alloy, core-shell or
Janus nanoparticles, we studied their temporal evolution from the gas via
droplets to nanocrystalline particles. In particular, we showed that the growth
mechanisms exhibit qualitative differences between these three chemical
orderings. Then, we determined how the quenching rate can be used to finely
tune structural characteristics of the final nanoparticles, including size,
shape and crystallinity.
