Stirring of perthiolated β-cyclodextrin in water yields cross-linked hollow capsules ca. 50 nm in diameter, which can be used for encapsulation and controlled release of large molecules as shown using Reichardt's dye.
Jones, L. C., Lackowski, W. M., Vasilyeva, Y., Wilson, K., & Chechik, V. (2009). Self-assembly of cross-linked β-cyclodextrin nanocapsules. Chemical Communications, 2009(11), 1377-1379. https://doi.org/10.1039/b820486a