In the typical synthetic procedure for AgNPS with an average diameter of 8 nm, 9.14 g of tetradecanoic acid (40.0 mmol), 10.78 g of octadecylamine (40.0 mmol), and 10.20 g of 1octadecene were placed in a flask and heated to 120 °C with vigorous stirring. In the resulting homogeneous solution, 10.04 g of the silver(I)-octanoate complex (40.0 mmol) was added and raised the temperature to 180 °C. The reaction was proceeded with vigorous stirring at 180 °C for 2 h. After reaction, the solution was cooled to ambient temperature, and washed three times with 2-propanol. After drying under ambient atmosphere for overnight, AgNPs as dark blue solid were obtained (5.12 g).