Calling the Shots 5

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close-up view of dye-loaded particles on a glass slide

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close-up view of dye-loaded particles on a glass slide

This image shows a fluorescent dye (blue) incorporated into small hollow particles for controlled delivery of vaccines and cancer treatments. These particles have a core-shell structure formed when a cap and base (incorporating the core) layers are fused together. The microparticle itself has a red fluorescent cap that is transparent. Thus, the blue dye is visible inside the particle from the top.