Nanoshells exhibit a phenomenon called localized surface plasmon resonance (LSPR). This is a collective oscillation of electrons in response to light, which leads to strong absorption and scattering. By adjusting the core and shell dimensions, the LSPR peak can be tuned across a wide range of wavelengths, from the visible to the near-infrared region. This tunability is particularly useful for biomedical applications like photothermal therapy and imaging.
