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XING ZHANG1,2,* , MING XU1,* , CHUNMAN YU2, HAO LU2, YAOTIAN YU2, XIAONAN XU1
High quality ZnSe/ZnS core/shell nanocrystals were synthesized by a convenient aq ueous phase method, achieving epitaxial growth at a very low temperature of 90℃. The nature of the ZnS shells grown on the surfaces of ZnSe core nanocrystals (average size, 4~5 nm) was determined by X ray diffraction (XRD), UV Vis spectrophotometry, photol uminescence (PL) measurements, high resolution transmission electron microscopy (HR TEM), and Fourier transform infrared spectroscopy (FT IR). The PL intensity of ZnSe/ZnS quantum dots (QDs) first increased and then decreased with increasing pH value. The strongest PL intensity occurs at the pH value of ~10.5. The strongest PL peak was centered at 400 nm (FWHM ~22 nm). The mechanism of the observed optical properties is discussed..
Low temperatu re pH, Quantum dots, Aqueous phase synthesis, Core-shell structure.
XING ZHANG, MING XU, CHUNMAN YU, HAO LU, YAOTIAN YU, XIAONAN XU, Low temperature aqueous phase synthesis and optical property study of ZnSe/ZnS core/shell quantum dots, Optoelectronics and Advanced Materials - Rapid Communications, 9, 7-8, July-August 2015, pp.924-929 (2015).
Submitted at: Feb. 15, 2015
Accepted at: June 24, 2015
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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