基于氯化镍的小直径纳米银线制备与工艺优化.

Silver nanowires(AgNWs)are good for conductive ink and flexible transparent conductive film, due to its high transmittance and good conductivity. The performance of silver nanowires with small diameter and high aspect ratio is better than that of silver nanowires, therefore it is necessary to discuss the preparation process and technology. In this paper, a simple solvent thermal method was used for the preparation of small diameter and homogeneous silver nanowires, using silver nitrate as a silver source, ethylene glycol(EG)as a reducing agent, polyvinylpyrrolidone(PVP)as a growth agent, and hexahydrated nickel chloride(NiCl2·6 H2O)as a control agent. The effects of reaction time, concentration of nickel chloride and PVP/AgNO3 molar ratio on the microstructure of silver nanowires were investigated. It was found that silver nanowires with smallest diameter(25~35 nm)and highest aspect ratio(1 000)were prepared when the concentration of NiCl2 was 200μmol/L, reaction time was 10 h, and PVP/AgNO3 molar ratio was 2. [ABSTRACT FROM AUTHOR]