nanoparticle composed of a metallic shell
surrounding a semiconductor. When nanoshells reach a target cancer cell,
they can be irradiated with near-infrared light or excited with a magnetic
field, either of which will cause the nanoshell to become hot, killing the
nanoparticles consisting of a metallic shell
surrounding a dielectric core. Recently nanoshells have also been prepared
that consist of a metallic core surrounded by a metallic shell consisting of
a different metal.
Nanoscale metal spheres, which can absorb or
scatter light at virtually any wavelength.
"The nanoshells act as an amazingly versatile optical
component on the nanometer
scale: they may provide a whole new approach to optical
materials and components," Professor Naomi Halas. See Metal Nanoshells
in Bioengineering and Nanoshells May Be Key To Next Wave Of Light-Based Technology and Physics of Nanoshells.