Our Amine-Activated Ruthenium Fluorescence Magnetic Beads offer efficient conjugation with proteins, peptides, and DNA, making them ideal for ultrasensitive fluorescent assays. These microspheres combine preactivated amine active groups, time-resolved fluorescence dyes, and magnetic characteristics to overcome common issues like high background signals and sensitivity to environmental factors. The beads also exhibit low fluorescence intermittency and overcome hydrophobicity-induced aggregation, resulting in highly sensitive assays.