POLYETHYLENE GLYCOL MODIFIED SEMICONDUCTOR FINE PARTICLE, METHOD FOR PRODUCING THE SAME AND MATERIAL FOR BIOLOGICAL DIAGNOSIS

摘要

PROBLEM TO BE SOLVED: To obtain a PEG modified semiconductor fine particle which has an effectively controlled reduction in fluorescence intensity, is stably dispersed into water and is readily combined with a biomolecule having specific recognition ability, to provide a method for simply producing the same and to obtain a material for a biological diagnosis.

SOLUTION: The water-soluble PEG modified semiconductor fine particle has constitution that a PEG containing a thiol group on at least one terminal is combined through cadmium with microcrystal of II-VI semiconductor of core-shell structure having ZnO, ZnS, ZnSe or ZnTe shell. The material for a biological diagnosis comprises a semiconductor fine particle in which the PEG of the fine particle is a heterobifunctional PEG.

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