Overview
- The proof-of-concept pairs DNA tetrahedrons and quantum dots on a MoS2 surface with CRISPR-Cas12a to convert target recognition into a second-harmonic signal change.
- Cas12a cleavage releases quantum dots from the surface, producing a sharp drop in the optical readout that enables direct detection without chemical amplification.
- In lab tests, the platform detected the lung cancer microRNA miR-21 at sub-attomolar concentrations and showed high sequence specificity.
- Researchers report a clear, rapid yes/no measurement from laser excitation with very low background noise, designed to simplify workflows and reduce errors.
- The team aims to miniaturize the optical setup into a portable device, expand validation across diverse patient cohorts, and pursue regulatory clearance before clinical use.