Figure 6

(a) Frequency dependent I-V switching of AgNPs; (b) I-V switching of AgNPs, Hg²⁺, AgNPs + Hg²⁺ at 0.16 Hz; (c), Hg²⁺ concentration dependant I-V switching of AgNPs at frequency 0.16 Hz; (d) plot of Hg²⁺ concentration against maximum negative current of AgNPs.