Cobalt disulfide nanowires as an effective fluorescent sensing platform for DNA detection

In this communication, for the first time, the facile production of cobalt disulfide nanowires (CoS₂ NWs) is achieved in solution using a two-step hydrothermal method and the formation mechanism of CoS₂ NWs is based on the anion-exchange reaction involving the pseudo Kirkendall effect. As a proof-of-concept application, CoS₂ NWs are applied as an effective fluorescent sensing platform for the detection of nucleic acid and this nanosensor exhibits extraordinarily high sensitivity with a detection limit as low as 10 pM and good selectivity. Most importantly, the successful use of this sensing platform in the fetal bovine serum system is also demonstrated.