Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China.
Langmuir. 2018 Apr 3;34(13):3884-3893. doi: 10.1021/acs.langmuir.8b00344. Epub 2018 Mar 23.
Copper nanowires (Cu NWs) have become a promising material for flexible transparent conductive electrodes (FTCEs) owing to their outstanding transparency and conductivity properties. In this work, ultralong Cu NWs with an average length over 250 μm and a diameter of around 50 nm (aspect ratio ∼5000) were synthesized in a water/polyhydric alcohol cosolvent. The effects of polyhydric alcohols (including ethanol, ethylene glycol, and glycerol) on the aspect ratio of Cu NWs were investigated. The diameter of Cu NWs decreased with the increased number of hydroxyl groups of polyhydric alcohols. In addition, the capping ligands (oleylamine and oleic acid) and glucose also exhibit important effects on the dispersity and morphology of Cu NWs. The ultralong Cu NW-based poly(dimethylsiloxane) (PDMS) FTCEs exhibit high performance with a low sheet resistance of 92.1 Ω sq at a transmittance of 91.524%. Inspired by the stretchable ability of PDMS, wearable sensors were fabricated to detect the movement of the finger joint through the chronoamperometry method. The prepared sensors exhibit high sensitivity and a fast response time. The excellent performance of FTCEs and wearable sensors suggests that the ultralong Cu NWs have a bright future in the application of the next generation of flexible optoelectronic devices.
铜纳米线（CuNWs）由于其出色的透光性和导电性，已成为一种很有前途的柔性透明导电电极（FTCEs）材料。在这项工作中，我们在水/多元醇共溶剂中合成了平均长度超过 250μm、直径约为 50nm（纵横比约为 5000）的超长 CuNWs。研究了多元醇（包括乙醇、乙二醇和甘油）对 CuNWs 纵横比的影响。CuNWs 的直径随着多元醇中羟基数量的增加而减小。此外，封端配体（油胺和油酸）和葡萄糖对 CuNWs 的分散性和形貌也有重要影响。基于超长 CuNW 的聚二甲基硅氧烷（PDMS）FTCEs 具有出色的性能，透光率为 91.524%时，其方阻低至 92.1Ω/sq。受 PDMS 可拉伸能力的启发，我们制备了可穿戴传感器，通过计时安培法来检测手指关节的运动。所制备的传感器具有高灵敏度和快速的响应时间。FTCEs 和可穿戴传感器的优异性能表明，超长 CuNWs 在下一代柔性光电设备的应用中具有广阔的前景。
