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Updated: Oct 7, 2025
Compact Quantum Dots for Single-molecule Imaging
Published on: October 9, 2012
Effect of concentration and shell thickness on the optical behavior of aqueous CdTe/ZnSe core/shell quantum dots
Farzad Farahmandzadeh1, Mehdi Molaei1, Hassan Alehdaghi2
1Department of Physics, Faculty of Science, Vali-e-Asr University, Rafsanjan, Iran.
Abstract:
In this work CdTe/ZnSe core/shell quantum dots (QDs) were synthesized via a simple, rapid and room temperature photochemical approach. Optical properties of aqueous prepared CdTe/ZnSe QDs were studied systematically under gamma irradiation with dose range of 0 Gy to 20 kGy. The obtained results showed a regular red shift behavior versus gamma irradiation dose, in photoluminescence peak and absorption edge of the CdTe/ZnSe QDs. Structural properties of CdTe/ZnSe QDs before and after gamma irradiation were characterized by means of X-ray diffraction (XRD), Raman and Fourier-transform infrared (FT-IR) analyses. The obtained results showed that the crystalline structure of CdTe/ZnSe core/shell QDs did not change after gamma irradiation. Concentration and shell thickness as two important factors on the sensitivity of CdTe/ZnSe QDs in front of gamma irradiation have been investigated. Based on this study, CdTe/ZnSe QDs are suggested as good candidates for gamma dosimeter.
