title: Precise size control and synchronized synthesis of six colors of CdSe quantum dots in a slow-increasing temperature gradient.
abstract: The present study describes a simultaneous and highly reproducible large-scale synthesis of six (and more) colors of size-homogeneous and highly luminescent CdSe quantum dots in a single reaction, controlled by a slow-increasing temperature gradient. The described protocol allows a precise control and a synchronized isolation of aliquots of CdSe nanocrystals with defined sizes, avoiding disturbance of the growth of nanocrystals (existing in the reaction mixture) to the isolation of the next aliquot. The obtained quantum dot fractions are of high quality (in 95% size-homogeneous) and have sharp photoluminescence spectra (fwhm approximately 30 nm), quantum yields of 45-70% (in organic solvent), and a lack of aggregation in organic solvents. The method is environmentally friendly as it ensures almost complete utilization of the precursors and productive yield approximately 95%.
authors.affiliation: Department of Physics and Biophysics, Medical University, Sofia, Bulgaria.
authors.forename: Genoveva
authors.initials: G
authors.lastname: Zlateva
authors.forename: Zhivko
authors.initials: Z
authors.lastname: Zhelev
authors.forename: Rumiana
authors.initials: R
authors.lastname: Bakalova
authors.forename: Iwao
authors.initials: I
authors.lastname: Kanno
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D015392:Chemistry, Inorganic / Q000379:methods*; D003460:Crystallization; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013696:Temperature
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D012997:Solvents; C058667:cadmium selenide