SEMICONDUCTOR NANOPARTICLE AGGREGATE, METHOD FOR PRODUCING THE SAME, AND BIOLOGICAL SUBSTANCE LABELING AGENT UTILIZING THE SAME

摘要

This invention provides a semiconductor nanoparticle aggregate comprising three or more types of semiconductor nanoparticles, which are different from each other in diameter, have a narrow particle size distribution, and are different from each other in maximum luminous wavelength of an emission spectrum in a wavelength region of 380 nm to 650 nm, a process for producing the semiconductor nanoparticle aggregate, and a biological substance labeling agent utilizing the semiconductor nanoparticle aggregate. The semiconductor nanoparticle aggregate comprises three or more types of semiconductor nanoparticles which have an identical chemical composition, are different from each other in particle diameter and fall within a particle diameter range of 1.8 to 4 nm and are different from each other in maximum luminous wavelength of an emission spectrum in a wavelength range of 380 to 650 nm. The semiconductor nanoparticle aggregate is characterized in that the difference in maximum luminous wavelength among three or more types of semiconductor nanoparticles constituting the semiconductor nanoparticle aggregate is in the range of 20 to 100 nm.