Li Zhihang, Guo Dong, Xiao Peng, Chen Junlong, Ning Honglong, Wang Yiping, Zhang Xu, Fu Xiao, Yao Rihui, Peng Junbiao
Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
School of Medical Instrument & Food Engineering, University of Shanghai for Science and Technology, No.516 Jungong Road, Shanghai 200093, China.
Micromachines (Basel). 2020 Feb 25;11(3):236. doi: 10.3390/mi11030236.
The urgent demand for transparent flexible electrodes applied in wide bandgap devices has promoted the development of new materials. Silver nanoring (AgNR), known as a special structure of silver nanowire (AgNW), exhibits attractive potential in the field of wearable electronics. In this work, an environmentally friendly glycerol-based cosolvent polyol method was investigated. The Taguchi design was utilized to ascertain the factors that affect the yield and ring diameter of AgNRs. Structural characterization showed that AgNR seeds grew at a certain angle during the early nucleation period. The results indicated that the yield and ring diameter of AgNRs were significantly affected by the ratio of cosolvent. Besides, the ring diameter of AgNRs was also tightly related to the concentration of polyvinylpyrrolidone (PVP). The difference of reducibility between glycerol, water, and ethylene glycol leads to the selective growth of (111) plane and is probably the main reason AgNRs are formed. As a result, AgNRs with a ring diameter range from 7.17 to 42.94 μm were synthesized, and the quantity was increased significantly under the optimal level of factors.
宽带隙器件中对透明柔性电极的迫切需求推动了新材料的发展。银纳米环（AgNR）作为银纳米线（AgNW）的一种特殊结构，在可穿戴电子领域展现出诱人的潜力。在这项工作中，研究了一种环保的基于甘油的共溶剂多元醇法。利用田口设计来确定影响AgNRs产率和环直径的因素。结构表征表明，AgNR晶种在成核初期以一定角度生长。结果表明，AgNRs的产率和环直径受共溶剂比例的显著影响。此外，AgNRs的环直径也与聚乙烯吡咯烷酮（PVP）的浓度密切相关。甘油、水和乙二醇之间还原性的差异导致（111）面的选择性生长，这可能是形成AgNRs的主要原因。结果，合成了环直径范围为7.17至42.94μm的AgNRs，并且在最佳因素水平下数量显著增加。
