By increasing the size of gold nanospheres from 20 to 80 nm, the magnitude of extinction as well as the relative contribution of scattering to the extinction rapidly increases. These metrics are regularly updated to reflect usage leading up to the last few days. Gold nanoshells are found to have optical cross-sections comparable to and even higher than the nanospheres. To compare the effectiveness of nanoparticles of different sizes for real biomedical applications, size-normalized optical cross-sections or per micron coefficients are calculated. Additionally, their optical resonances lie favorably in the near-infrared region. A systematic quantitative study of the various trends is presented. The resonance wavelength can be rapidly increased by either increasing the total nanoshell size or increasing the ratio of the core-to-shell radius. Find more information on the Altmetric Attention Score and how the score is calculated.
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