Microfireworks
Yadong Yin, University of California, Riverside
The firework pattern is obtained from a nanoparticle thin film containing radial microcracks created by drying a drop of magnetite nanoparticle dispersion
on a glass substrate. When imaged in a dark-field optical microscope, the microcracks strongly scatter light, producing the firework effect. No post-processing was done to the image.