A Sensitive Fluorescence Biosensor for Silver Ions (Ag⁺) Detection Based on C-Ag⁺-C Structure and Exonuclease III-Assisted Dual-Recycling Amplification

Table 1

Comparison of the proposed assay with some reported methods.

Signal amplification strategy	Linear range	Detection limit	Apply to real samples	Reference
Quartz crystal microbalance (QCM) and silver-specific DNAs	100 pmol/L–1 μmol/L	100 pmol/L	Yes	[33]
Single-layer MoS2 nanosheets	1 nmol/L–100 nmol/L	1 nmol/L	Yes	[34]
Nanoporous gold/anionic intercalator	0.1 nmol/L–1 μmol/L	0.48 pmol/L	Yes	[35]
Cationic polymer-directed AuNPs aggregation	80 nmol/L–10000 nmol/L	48.6 nmol/L	No	[36]
Hemin/G-quadruplex nanowire	0.1 nmol/L–100 mmol/L	0.05 nmol/L	Yes	[37]
Nanographite-DNA hybrid and DNase I	1 nmol/L–200 nmol/L	0.3 nmol/L	Yes	[38]
HAC-DNA interaction	0.1 μmol/L–75 μmol/L	58 nmol/L	No	[39]
C-Ag^+-C structure and exonuclease III	5 pmol/L–1500 pmol/L	2 pmol/L	Yes	This work