| The main aim of this article is to demonstrate the unique characteristics of the nanocrystals, such as confinement of optical phonons and the appearance of surface phonons in CdSe-CdS core-shell particles. Including the optical phonon confinement in core and shell components of the particles separately, we have estimated the diameter of the particle and the shell thickness, which have been further matched with the measured values of the same from transmission electron microscopy. Making use of the dielectric continuum model, we have matched the experimental and theoretical values of the frequencies of the surface phonon modes. |
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