This image shows an array of polymer microparticles embedded with gold nanorods on a glass microscope slide. Each particle is connected to its neighbors by a thin polymer “scum” layer.

The black appearance comes from the gold nanorods, which act as plasmonic resonators designed to trigger initial drug release upon light-induced heating.

These particles are being developed for a dual-release cancer treatment strategy, combining rapid drug release through photothermal activation with sustained release from polymer degradation, offering precise, localized therapy with potential clinical applications.