Photothermal compression of colloidal crystals

Publisher Website
Google Scholar
Abstract
Dyed sulfonated polystyrene spheres (83 nm diameter) self‐assemble into regular crystalline arrays that Bragg diffract visible light. Absorption of high intensity radiation (>25 W/cm2) by the dye results in a local compression of the crystalline array due to local heating. The Kossel ring pattern is used to probe the variation in the lattice parameter and the dynamics of the thermally induced compression. The thermally induced compression derives from the negative temperature dependence of the interparticle interaction potential.