| Abstract: | In this work, a fluorescent method is developed for ultrasensitive detection of virus DNA, coupling DNA‐modified carbon nanodots (CDs) and an isothermal amplification technology. The sensitivity is significantly improved with cyclic strand displacement polymerization and highly luminescent CDs. Taking the hemagglutinin7 (H7) gene and neuraminidase 9 (N9) gene as examples, the limits of detection are 4.6 × 10?15 and 3.4 × 10?15 m , respectively. Furthermore, the proposed method is highly selective and capable of detecting target sequences in biological samples, indicating great potential for applications in life science research and clinical diagnosis. |
