Preparation of Silver Nanowires via a Rapid,Scalable and Green Pathway
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2015年第1期
论文作者：Cheng Yang Youhong Tang Zijin Su Zhexu Zhang Cheng Fang
文章页码：16 - 22
摘 要：Rapid synthesis of silver nanowires（Ag NWs） with high quality and a broad processing window is challenging because of the low selectivity of the formation of multiply twinned particles at the nucleation stage for subsequent Ag NWs growth.Herein we report a systematic study of the water-involved heterogeneous nucleation of Ag NWs with high rate（less than 20 min） in a simple and scalable preparation method.Using glycerol as a reducing agent and a solvent with a high boiling point,the reaction is rapidly heated to 210 ℃ in air to synthesize Ag NWs with a very high yield in gram level.It is noted that the addition of a small dose of water plays a key role for obtaining highly pure Ag NWs in high yield,and the optimal water/glycerol ratio is0.25%.After investigating a series of forming factors including reaction temperature and dose of catalysts,the formation kinetics and mechanism of the Ag NWs are proposed.Compared to other preparation methods,our strategy is simple and reproducible.These Ag NWs show a strong Raman enhancement effect for organic molecules on their surface.
Cheng Yang1，Youhong Tang2，Zijin Su1，Zhexu Zhang1，Cheng Fang3
1. Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University2. Centre for Nanoscale Science and Technology, School of Computer Science, Engineering and Mathematics,Flinders University3. Centre for Environmental Risk Assessment & Remediation, University of South Australia
摘 要：Rapid synthesis of silver nanowires（Ag NWs） with high quality and a broad processing window is challenging because of the low selectivity of the formation of multiply twinned particles at the nucleation stage for subsequent Ag NWs growth.Herein we report a systematic study of the water-involved heterogeneous nucleation of Ag NWs with high rate（less than 20 min） in a simple and scalable preparation method.Using glycerol as a reducing agent and a solvent with a high boiling point,the reaction is rapidly heated to 210 ℃ in air to synthesize Ag NWs with a very high yield in gram level.It is noted that the addition of a small dose of water plays a key role for obtaining highly pure Ag NWs in high yield,and the optimal water/glycerol ratio is0.25%.After investigating a series of forming factors including reaction temperature and dose of catalysts,the formation kinetics and mechanism of the Ag NWs are proposed.Compared to other preparation methods,our strategy is simple and reproducible.These Ag NWs show a strong Raman enhancement effect for organic molecules on their surface.
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