Si/Si3N4 NANOPARTICLE, BIOSUBSTANCE LABELING AGENT BASED ON THE SAME, AND PROCESS FOR PRODUCING THE NANOPARTICLE

摘要

An Si/Si<SUB>3</SUB>N<SUB>4</SUB> nanoparticle that is less in biotoxicity and environmental burden, excelling in chemical stability, and that exhibits a high relative luminescence intensity, being less in the decrease of luminescence intensity at continuation of light irradiation. Further, there is provided a biosubstance labeling agent based on the Si/Si<SUB>3</SUB>N<SUB>4</SUB> nanoparticle that is capable of continuing to label biosubstances at high brightness for a prolonged period of time. Still further, there is provided a process for producing the above Si/Si<SUB>3</SUB>N<SUB>4</SUB> nanoparticle.