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The performance of the G7 DNA (1 µM) and Tb3+ (5 µM) based sensor for Ag+ detection in 50 mM HEPES pH 7.5 buffer. (A) Sensor response to various Ag+ concentrations; (B) The sensor response at low Ag+ concentrations; (C) Sensor selectivity test at two metal concentrations. Only Ag+ produced the signal. Each experiment in this paper was repeated at least twice and the error bars represent the standard deviation of these measurements.
