dorsal/arxiv
View SchemaOptics of Nanostructured Fractal Silver Colloids
| Authors | S. V. Karpov, A. L. Bas'ko, A. K. Popov, V. V. Slabko, Thomas F. George |
|---|---|
| Categories | |
| ArXiv ID | physics/0301081 |
| URL | https://arxiv.org/abs/physics/0301081 |
| Journal | Chapter in Resent Research Developments in Optics, vol. 2, Research Signpost, Trivandrum, India, 2002, pp. 427-463 |
Abstract
Based on the theory of the optical properties of fractal clusters, which is an operator-based modification of the coupled-dipole method, an alternate solution is proposed for the problem of adequately describing the evolution of optical spectra of any polydisperse silver colloid with particles falling within the range of most characteristic sizes (5 - 30 nm). This is the range over which the results of the application of the well-known methods of classical electrodynamics, including the Mie theory, disagree with experimental data. The effect of variation of the parameters of such media on optical spectra is studied by a numerical simulation, which accounts for particle electrodynamic dipole-dipole interactions. Indeed, such interactions are shown to be a key factor in determining the broadening of the sol absorption spectra during the course of fractal aggregation. A quantitative explanation is given for the reasons for the appearance of individual specific features in the contours of the spectral absorption of different types of silver colloids.
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"abstract": "Based on the theory of the optical properties of fractal clusters, which is\nan operator-based modification of the coupled-dipole method, an alternate\nsolution is proposed for the problem of adequately describing the evolution of\noptical spectra of any polydisperse silver colloid with particles falling\nwithin the range of most characteristic sizes (5 - 30 nm). This is the range\nover which the results of the application of the well-known methods of\nclassical electrodynamics, including the Mie theory, disagree with experimental\ndata. The effect of variation of the parameters of such media on optical\nspectra is studied by a numerical simulation, which accounts for particle\nelectrodynamic dipole-dipole interactions. Indeed, such interactions are shown\nto be a key factor in determining the broadening of the sol absorption spectra\nduring the course of fractal aggregation. A quantitative explanation is given\nfor the reasons for the appearance of individual specific features in the\ncontours of the spectral absorption of different types of silver colloids.",
"arxiv_id": "physics/0301081",
"authors": [
"S. V. Karpov",
"A. L. Bas\u0027ko",
"A. K. Popov",
"V. V. Slabko",
"Thomas F. George"
],
"categories": [
"physics.optics",
"physics.atm-clus"
],
"journal_ref": "Chapter in Resent Research Developments in Optics, vol. 2,\n Research Signpost, Trivandrum, India, 2002, pp. 427-463",
"title": "Optics of Nanostructured Fractal Silver Colloids",
"url": "https://arxiv.org/abs/physics/0301081"
},
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