Featured Paper by Y. Davletshin & J.C. Kumaradas
The optical scattering and absorption of gold nanorods (GNRs) depends on its size, shape, and surroundings. This dependence is due to both intrinsic and extrinsic effects. A good understanding of this dependence is needed for applications of GNRs in photo-thermal therapy, optical and opto-acoustic imaging, biosensing, and other photonic areas. Extrinsic effects are caused by the production of localized and surface plasmons and are well understood through Mie theory for spherical particles and Maxwell’s equations for arbitrary objects. Intrinsic effects become prominent at the nano-scale, when the cluster size becomes comparable or smaller than the bulk mean free path of electrons between collisions and additional scattering of the conduction electrons from the cluster surface occur. The addition of this scattering will shorten the mean free path between collisions and increase the damping constant.
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