LAUSR

In this report, using Monte Carlo simulations, we investigate the cluster structure of colloidal dumbbells with asymmetric properties in sizes via emulsion droplet evaporation. By tuning the diameter ratio of two spherical colloids, q=σl/σs$q=\sigma _{l}/\sigma _{s}$ with σl$\sigma _{l}$ the diameter of the larger sphere and σs$\sigma _{s}$ the diameter of the smaller sphere, we obtain clusters with both the compact and open structures. For q<1.2$q<1.2$, we found a unique category of cluster isomers that minimize the second moment of the mass distribution. The uniqueness is lost when q ranges from 1.2 to 1.7. A further increase in the size ratio leads to a variety of different isomers with more complex configurations.