Abstract
The effect of the coordinating (capping) ligand benzyl mercaptan (BM) on the size and spectral-luminescent properties of CdS quantum dots (QDs) has been investigated. The QDs are synthesized from cadmium acetate and thiourea at a 1 × 1 molar ratio under microwave activation in dimethylformamide. Monodisperse QDs are obtained at a BM: CdS molar ratio of 1.5, which provides the complete coating of the QD surface by mercaptan molecules. The resulting QDs have a diameter of 2.4 nm; their absorption maximum is at 332 nm and the emission band is at 450 nm. The full width of the emission band at half maximum is 100 nm.
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