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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/36986

Title: Effect of ZnS Shell Thickness on the Phonon Spectra in CdSe Quantum Dots
Author: DONEGAN, JOHN FRANCIS
RAKOVICH, YURY
MOORE, ALAN
PEROVA, TANIA
Sponsor: Science Foundation Ireland
Enterprise Ireland
Author's Homepage: http://people.tcd.ie/rmoore
http://people.tcd.ie/jdonegan
http://people.tcd.ie/rakovicy
http://people.tcd.ie/perovat
Keywords: Electronic & Electrical Engineering
Issue Date: 2003
Publisher: The American Physical Society
Citation: A.V. Baranov, Yu. P. Rakovich, and J. F. Donegan, T. S. Perova, R.A. Moore, D.V. Talapin, A.L. Rogach, Y.Masumoto, and I. Nabiev ‘Effect of ZnS Shell Thickness on the Phonon Spectra in CdSe Quantum Dots’ in Physical Review B, 68, (16), 2003, pp 1 - 7
Series/Report no.: Physical Review B
68
16
Abstract: The evolution of the optical phonon spectra of colloidal core/shell CdSe/ZnS quantum dots with an increase of the shell thickness from 0.5 to 3.4 monolayers has been studied by resonant Raman spectroscopy. The results obtained suggest that the ZnS shell changes its structure from amorphous to partly crystalline as the thickness increases. Simultaneously, an increase in Raman scattering by surface ~core/shell interface! phonons and the redshift of the corresponding phonon band have been observed and assigned to variations in the shell structure. The disorder present in the shell provides a major contribution to the line shape of the Raman spectra at higher ZnS coverage. A method to control the quality of quantum dots based on Raman spectroscopy is proposed.
Description: PUBLISHED
URI: http://dx.doi.org/10.1103/PhysRevB.68.165306
http://hdl.handle.net/2262/36986
Appears in Collections:Electronic & Electrical Eng (Scholarly Publications)

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