Photoactivation of luminescence in CdS nanocrystals

• Valentyn Smyntyna,
• Bogdan Semenenko,
• Valentyna Skobeeva and
• Nikolay Malushin

Beilstein J. Nanotechnol. 2014, 5, 355–359, doi:10.3762/bjnano.5.40

• nanocrystals used in these experiments were prepared by colloid chemistry of solutions of cadmium- and sulfursalts in an aqueous gelatin solution. Details of the sample preparation are described in [15]. The average radius of the cadmium sulfide nanocrystals was calculated from the optical absorption spectra

• prevails and an increase of the luminescence yield is observed. Our samples differ from the CdSe/ZnS QDs, in which an amplification of photoindiced luminescence has been previously observed [1][2][3][4][5], because they are synthesized in an aqueous solution of gelatin. During the synthesis of cadmium

• sulfide nanocrystals gelatin plays the role of a growth stabilizer and a coating agent. Gelatin is a natural polymer that is capable of absorbing large amounts of moisture from the environment. It is evident that the cadmium sulfide nanocrystals are contained in the gelatin matrix, which contains a high