| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10675783 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2005 | 7 Pages |
Abstract
Bare and silica coated CdS quantum dots are prepared following chemical route. Swift heavy ion (SHI) irradiation of the samples was carried out with 160Â MeV Ni12+ ion beam with fluences 1012-1013Â ions/cm2. Photoluminescence (PL) studies of all the samples were carried out with excitation wavelength 325Â nm. The surface state emission is dominant in case of bare samples while e-h recombination is observed in case of coated samples. Red shift in the absorption response in the optical absorption spectra of bare samples reveal size enhancement of the quantum dots after irradiation. No such shift is observed for coated samples. The coated samples also exhibit enhanced photo stability.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
S. Chowdhury, G.A. Ahmed, D. Mohanta, S.K. Dolui, D.K. Avasthi, A. Choudhury,