Absorption Spectral Simulation of the End-to-End Linked Gold Nanorods Chain Structure
Abstract:A classical electrostatic simulation model was developed to study the absorption spectral features of the end-to-end linked and equally-spaced n gold nanorods system with n=2 to 20 for the first time. The model calculation takes into account the dipole-dipole interactions only and solved for the mean polarizability of such nano-chain. We modelled the evolution of the longitudinal surface plasmon (SPlong) absorption band of such system in terms of the interparticle spacings and the number of nanorods. In both cases, either the decrease of interparticle spacing or the increase of n, the evolution of the SPlong bands exhibits a clear spectral red-shift similar to other assembled forms reported in literature. The extent of such spectral shift can be as large as more than 100 nm before levelling off. The interparticle dipole-dipole interaction, characterized by the results in the spectral features of SPlong bands, evidences an effective spatial range of ca. 100 nm.
Keywords: BEM; DDA; End-To-End Rods Chain; FDTD; FWHM; MLWA; Mie/Drude formalism; Raman scattering; SPlong band shift; Surface plasma resonance; chain structure; dipole-dipole interaction; electric field; end-to-end link; fluorescence; gold nanorod; irradiation; laser-induced photoacoustic tomography; nanorods; polarizability; polarization; surface plasmon
Document Type: Research Article
Publication date: 2010-12-01
- Current Nanoscience publishes authoritative reviews and original research reports, written by experts in the field on all the most recent advances in nanoscience and nanotechnology. All aspects of the field are represented including nano- structures, synthesis, properties, assembly and devices. Applications of nanoscience in biotechnology, medicine, pharmaceuticals, physics, material science and electronics are also covered. The journal is essential to all involved in nanoscience and its applied areas.