Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 47, Pages 16884-16888Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201910695
Keywords
anisotropic colloids; colloidal rings; instability; patchy colloids; surface patterning
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Funding
- NSFC [21774136]
- Hundred Talents Program of ICCAS
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Plateau-Rayleigh (P-R) instability occurring on Brownian colloidal particles is presented. This instability can be used for the surface patterning of Brownian colloidal rings. This idea was realized by employing polystyrene(PS)/SiO2 core/shell rings, for which PS layer was selectively grown onto the interior surface of SiO2 rings. The P-R instability was initiated in the ring's dispersion by adding a good solvent of PS. By using both experiments and theory, it is shown that the number of patches is tunable and that it is linearly related to a function of two variables, namely, solvent quantity and contact angle. In particular, one-patch Janus rings and patchy disks were also synthesized at high yields. The patch size of all particles is tunable by step-by-step polymerization and the patches can be functionalized, for example by ATRP grafting with pH-sensitive polymers. This approach can be adapted for the synthesis of other patchy colloids with designated complexity.
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