5301 |
391 |
CuS HNSs. |
a portable and cost-effective Hg2+ nanosensor has been developed based on a desorption-free enrichmentdetection integration strategy. The core of the nanosensor is the employment of CuS HNSs, which play three roles including recognition unit for Hg2+ sensing, enrichment carrier for Hg2+ preconcentration, and mimetic peroxidase for signal amplification and readout. The customizable enrichmentdetection integration strategy gives the nanosensor a high selectivity, a wide detection range (50 ppt to 400 ppb), and a high sensitivity with a minimum detectable Hg2+ concentration of 50 ppt. In addition, the as-developed nanosensor is feasible for analysis of Hg2+ in real-world environmental and food samples with moderate accuracy (deviation <10%) and reproducibility (recovery ∼82%). |
Hg2+ |
Color |
|
|
0.05 |
ppb |
82 |
|