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Changes in conductivity (µS) of the aqueous suspension of Ag-NPs at a mass concentration of 400 mg L−1 versus time in (min). Ag-NPs were prepared using an aqueous extract of Tanaceti folium and 1 mM AgNO3 (1:9, v/v). Ag-NPs were separated after centrifugation and dispersed in deionised water without washing (black line) or washed and redispersed in deionised water (red line, inset).
