Super-lattice effects in ordered core-shell nanorod arrays detected by Raman spectroscopy
Contributo in Atti di convegno
Data di Pubblicazione:
2012
Citazione:
Super-lattice effects in ordered core-shell nanorod arrays detected by Raman spectroscopy / A. Alabastri, R. Krahne, A. Giugni, G. Das, R. Zaccaria, M. Zanella, I. Franchini, E. di Fabrizio - In: Proceedings of the 2011 Comsol Conference / [a cura di] COMSOL.CO.IN. - Prima edizione. - Stuttgart : COMSOL.CO.IN, 2012. (( convegno COMSOL Conference tenutosi a Stuttgart nel 2011.
Abstract:
We studied the optical phonon excitations (LO) of ordered arrays of dot/ rod core-shell CdSe/ CdS nanorods by Raman spectroscopy. Upon deposition on planar substrates the nanorods formed super-lattice structures via side-by side assembly into tracks over some microns of length. COMSOL Multiphysics software has been used to calculate the magnitude of the electric field generated by the interaction of an incident electromagnetic wave with an array of CdSe/CdS nanorods. In particular two configurations were considered: i) localized charges in the nanorods; ii) no localized charges in the nanorods. To this purpose a 2D model has been implemented and simulations have been performed for both polarizations of the incident
electromagnetic field.
Multiphysical characteristics of COMSOL have been exploited as the simulation relied on a two-steps process. First, localized charges have been set-up near the CdSe cores to mimic the promotions of electrons and an electrostatic simulation was launched. Second, the calculated electric displacement field was used to modify materials conductivity and thus the interaction with the impinging electromagnetic wave.
Tipologia IRIS:
03 - Contributo in volume
Keywords:
Super-Lattice effect; Nanorods; Raman; electromagnetic interaction; electrons promotion
Elenco autori:
A. Alabastri, R. Krahne, A. Giugni, G. Das, R. Zaccaria, M. Zanella, I. Franchini, E. di Fabrizio
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Titolo del libro:
Proceedings of the 2011 Comsol Conference