CD Bioparticles provides DiagNano™ gold nanoshells with surface plasmon resonant (SPR) absorption at 660, 800 and 980 nm. DiagNano™ gold nanoshells consist of a nanoscale silica core coated by a thin gold shell. Gold nanoshells are the first nanoparticle used for photothermal cancer therapy and the transition of this approach to clinical trials is currently underway.