Nanocages
Gold nanoparticles absorb light in the visible spectrum of light (at about 550 nm) and kills surrounding cancer cells.
They are biocompatible and a contrast agent for optical coherence tomography, which uses light scattering in a way analogous to ultrasound to produce in-vivo images of tissue with resolution approaching a few micrometres. A contrast agent is required to image cancers at an early, more treatable stage.
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