2.3. Preparation of AgNWs
Silver nanowires were synthesized by reducing AgNO3 with EG
in the presence of polyol. In a typical synthesis, 10 mL of EG were
refluxed at 160 ◦C for 25 min. Then, 5 mL solution of AgNO3 in EG
and 10 mL solution of 0.15 M PVP in EG containing 0.03 mM MnCl2
were simultaneously injected into the flask over a period of 10 min,
the reaction mixture was further refluxed and vigorously stirred at
160 ◦C for 60 min. The reaction mixture was then cooled to room
temperature. The product was centrifuged at 3000 rpm for 5 min,
and then washed with acetone and ethanol for three times.