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This and the next image are from:
"Lock and key colloids through polymerization-induced buckling of monodisperse silicon oil droplets", by Stefano Sacanna, William T. M. Irvine, Laura Rossi and David J. Pine, in Soft Matter, 2011,7, 1631-1634, DOI: 10.1039/C0SM01125H
Author affiliation: Center for Soft Matter Research, Department of Physics, New York University, 4 Washington Place, New York, USA
ABSTRACT: We have developed a new simple method to fabricate bulk amounts of colloidal spheres with well defined cavities from monodisperse emulsions. Herein, we describe the formation mechanism of “reactive” silicon oil droplets that deform to reproducible shapes via a polymerization-induced buckling instability. Owing to their unique shape, the resulting particles can be successfully used as colloidal building blocks in the assembly of composite clusters via “lock-and-key” interactions.
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