(華東理工大學(xué) 超細(xì)粉末國(guó)家工程研究中心，上海 200237)
摘 要: 將多元醇還原法和晶種法相結(jié)合，以硝酸銀為銀源、乙二醇為還原劑和溶劑、聚乙烯吡咯烷酮為生長(zhǎng)導(dǎo)向劑，通過(guò)添加氯化銅作為晶型誘導(dǎo)劑引入晶種來(lái)制備高長(zhǎng)徑比高純納米銀線(xiàn)。探討晶型誘導(dǎo)劑濃度、PVP與AgNO3的摩爾比、晶種生長(zhǎng)時(shí)間以及體系攪拌速度等反應(yīng)條件對(duì)銀線(xiàn)形貌的影響。結(jié)果表明：在170 ℃下，當(dāng)CuCl2濃度為0.15 mmol/L、PVP與AgNO3的摩爾比為6:1、晶種生長(zhǎng)時(shí)間控制為10 min、攪拌速度為400 r/min時(shí)，可制取長(zhǎng)度超過(guò)50 μm、直徑介于80~100 nm、長(zhǎng)徑比超過(guò)500的納米銀線(xiàn)。
關(guān)鍵字: 納米銀線(xiàn)；醇還原法；長(zhǎng)徑比
（East China University of Science and Technology, National Engineering Research Center of Ultrafine Power, Shanghai 200237, China）
Abstract:Silver nanowires (AgNWs) with high aspect ratio and high purity was produced by polyol method combined with seed-growth through employing process with ethylene glycol as solvent and reducing agent, silver nitrate as silver source, polyvinyl pyrrolidone (PVP) as wire-directing agent and copper chloride (CuCl2) as seed inducer. The effects of the concentration of seed inducer, the molar ratio of polyvinyl pyrrolidone (PVP) to silver nitrate (AgNO3), time of seed-growth and the stirring rate on the morphology and size of AgNWs were investigated. The results show that AgNWs with length over 50 μm, diameter ranging from 80-100 nm and aspect ratio over 500 are prepared when the concentration of CuCl2 is 0.15 mmol/L, the molar ratio of PVP to AgNO3 is 6, the growing time of seed is 10min and the stirring speed is 400 r/min at 170 ℃.
Key words: silver nanowire; polyol process; aspect ratio
