Chemometric approach to study the influence of synthesis parameters on the size of CdTe quantum dots obtained from aqueous solutions

Abstract

approach to study the influence of synthesis parameters on the size of cdte quantum dots obtained from aqueous solutions., Arabian Journal of Chemistry (2016), doi: http://dx. Abstract.This study reports CdTe quantum dots synthesis in an aqueous medium using cadmium chloride and sodium tellurite as precursors and sodium borohydride and mercaptosuccinic acid as reducing and capping agents, respectively. The synthesis process was optimized through experimental design, and particle characterization was carried out by UV-Vis spectroscopy and molecular fluorescence. In the first stage, a factorial design was used to establish the significance of each of the synthesis variables; i.e., the temperature, pH, reaction time and precursor molar ratios. In the second stage, a multivariate design was constructed to relate the synthesis variables with the maximum absorbance wavelengths, which allowed for predictions of the diameters of the CdTe quantum dots, which were compared with direct measurements of the particles analyzed by highresolution transmission electron microscopy, HR-TEM and X-ray diffraction, XRD. Finally, there is a brief discussion regarding the existing models predicting particle sizes.

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Communication—Hydroxyl Radicals Attack CdTe Quantum Dots

“…The size of the nanoparticles was estimated by high-resolution transmission electron microscopy (HR-TEM-Tecnai F20 STWIN operated to 200 kV) and calculated by Peng et al's method. 9 Our previous work 6 uses the Peng model and the maximum absorbance wavelengths (λ abs ) for QD diameter estimation. The estimated results are shown in Table I.…”

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