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Appl. Sci. 2016, 6(10), 278; doi:10.3390/app6100278

Formation of a Colloidal CdSe and ZnSe Quantum Dots via a Gamma Radiolytic Technique

Department of Physics, University Putra Malaysia, Serdang 43400, Selangor, Malaysia
Young Researchers and Elite Club, Shahr-e-Qods Branch, Islamic Azad University, Tehran 37541-374, Iran
School of Applied Physics, Faculty of Science and Technology, University Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia
Author to whom correspondence should be addressed.
Academic Editor: Philippe Lambin
Received: 28 July 2016 / Revised: 18 September 2016 / Accepted: 23 September 2016 / Published: 28 September 2016
View Full-Text   |   Download PDF [1991 KB, uploaded 28 September 2016]   |  


Colloidal cadmium selenide (CdSe) and zinc selenide (ZnSe) quantum dots with a hexagonal structure were synthesized by irradiating an aqueous solution containing metal precursors, poly (vinyl pyrrolidone), isopropyl alcohol, and organic solvents with 1.25-MeV gamma rays at a dose of 120 kGy. The radiolytic processes occurring in water result in the nucleation of particles, which leads to the growth of the quantum dots. The physical properties of the CdSe and ZnSe nanoparticles were measured by various characterization techniques. X-ray diffraction (XRD) was used to confirm the nanocrystalline structure, energy-dispersive X-ray spectroscopy (EDX) was used to estimate the material composition of the samples, transmission electron microscopy (TEM) was used to determine the morphologies and average particle size distribution, and UV-visible spectroscopy was used to measure the optical absorption spectra, from which the band gap of the CdSe and ZnSe nanoparticles could be deduced. View Full-Text
Keywords: gamma radiolytic technique; CdSe; ZnSe; quantum dots; particle size; band gap gamma radiolytic technique; CdSe; ZnSe; quantum dots; particle size; band gap

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Salem, A.; Saion, E.; Al-Hada, N.M.; Shaari, A.H.; Kamari, H.M.; Soltani, N.; Radiman, S. Formation of a Colloidal CdSe and ZnSe Quantum Dots via a Gamma Radiolytic Technique. Appl. Sci. 2016, 6, 278.

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