کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5430131 | 1508706 | 2009 | 13 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Bottom-up multi-step approach to study the relations between the structure and the optical properties of carbon soot nanoparticles Bottom-up multi-step approach to study the relations between the structure and the optical properties of carbon soot nanoparticles](/preview/png/5430131.png)
In this paper we study the relations between the structure of approximately spherical carbonaceous nanoparticles and their frequency dependent dielectric susceptibility in the optical and near-UV domain. Because the nanoparticles are defined atomistically, the set of atomic point dipoles is distributed on an irregular grid and we cannot use traditional discrete-dipole approximation (DDA) codes. We thus developed an approximate multi-step methods that allowed us to discuss scattering of light by both carbonaceous nanoparticles and aggregates of these nanoparticles. We find that the dielectric susceptibility of these nanoparticles is highly dependent on the type of chemical units used to construct the particles, but almost independent of their distribution in the various shells of the nanoparticle.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 110, Issues 14â16, SeptemberâNovember 2009, Pages 1615-1627