| abstract |
The present invention improves the binding property of a labeling agent in an analysis for biological materials, an analysis for detecting an antigen by an ELISA method, and the like. It is to provide analysis with higher sensitivity and higher accuracy. A silica particle containing a plurality of nanoparticles, wherein the interparticle distance between the plurality of nanoparticles is 3 nm or more and 7 nm or less. [Selection figure] None |