Optical modulation biosensing platform for high sensitivity and high throughput detection of antigens and specific RNA sequences

Detection of biomarkers at low concentrations is essential for early diagnosis of numerous diseases. In many sensitive assays, the target molecules are tagged using fluorescently labeled probes and captured using magnetic beads. Current devices rely on quantifying the target molecules by detecting the fluorescent signal from individual beads. Here, we demonstrate a high-throughput optical modulation biosensing (ht-OMB) system Using the ht-OMB system to detect human Interleukin-8, we demonstrated a limit of detection of 0.14 ng/L and a 4-log dynamic range, values which are on par with the most sensitive devices, but are achieved without their bulk and laborious protocols.