Facile synthesis of high-quality water-soluble N-acetyl-L-cysteine-capped Zn1-xCdxSe/ZnS core/shell quantum dots emitting in the violet–green spectral range

Facile synthesis of high-quality water-soluble N-acetyl-L-cysteine-capped Zn1-xCdxSe/ZnS core/shell quantum dots emitting in the violet–green spectral range: "Publication year: 2010
Source: Journal of Colloid and Interface Science, In Press, Accepted Manuscript, Available online 6 May 2010
Jie, Cao , Bing, Xue , Hui, Li , Dawei, Deng , Yueqing, Gu
In this paper, we report a new facile method to synthesize water-soluble Zn1-xCdxSe and core/shell Zn1-xCdxSe/ZnS quantum dots (QDs) emitting in the violet−green spectral range, using N-acetyl-L-cysteine (NAC) as a stabilizer. The influence of various experimental variables, including the precursor Zn/Cd/Se/NAC molar ratios, the pH of original solution and the refluxing time on optical properties were explored systematically. The obtained aqueous Zn1-xCdxSe QDs exhibit a tunable photoluminescence (PL) emission (from ∼415 nm to 506 nm) and a favorable narrow PL bandwidth (FWHM: 27–38 nm). After coating with a ZnS shell, the PL emission intensity of the formed core/shell Zn1-xCdxSe/ZnS QDs...

Graphical abstract

Zn1-xCdxSe and Zn1-xCdxSe/ZnS core/shell quantum dots (QDs) emitting in the violet−green spectral range have been synthesized successfully in aqueous solutions, using N-acetyl-L-cysteine (NAC) as a stabilizer.
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