METHOD OF PRODUCING COLLOIDAL QUANTUM POINTS OF ZINC SELENIDE IN CELLS OF CHITOSAN Russian patent published in 2019 - IPC C01B19/04 C01G9/00 C09K11/54 C09K11/88 B01J13/00 B82B3/00 B82Y15/00 B82Y30/00 A61K49/18 

FIELD: physics.

SUBSTANCE: invention relates to production of quantum dots used as biological markers. Method of producing colloidal semiconductor quantum dots of zinc selenide in a chitosan shell involves reaction of zinc chloride with selenide ions in the presence of ammonia and a coating agent. Chitosan solution, obtained by mixing 0.5 g of chitosan dry powder and 50 ml of 2 % acetic acid, is added with 8.0 ml of 0.008 M aqueous solution of zinc chloride at room temperature and constant stirring. Then 1.5 ml of 0.1 M aqueous solution of ammonia is added. Then 0.12 ml of 0.25 M solution of sodium selenosulphate is slowly added to the obtained solution by drops under constant vigorous stirring.

EFFECT: invention enables to obtain zinc selenide quantum dots coated with chitosan at room temperature without using toxic reagents and complex equipment, to provide better interaction of quantum dots with biological objects.

1 cl, 3 dwg