High-efficiency extraction synthesis for high-purity copper nanowires and their applications in flexible transparent electrodes
High-efficiency extraction synthesis for high-purity copper nanowires and their applications in flexible transparent electrodes
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DOI：
10.1016/j.nanoms.2019.09.007
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发表时间：
2020-06
影响因子：
9.9
通讯作者：
He Zhang;Shang Wang;Yanhong Tian;J. Wen;C. Hang;Zhen-zhu Zheng;Yilong Huang;S. Ding;Chenxi Wang
中科院分区：
文献类型：
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作者：
He Zhang;Shang Wang;Yanhong Tian;J. Wen;C. Hang;Zhen-zhu Zheng;Yilong Huang;S. Ding;Chenxi Wang
铜纳米线(CuNW)被认为是柔性透明电极(FTE)中替代铟锡氧化物(ITO)的一种很好的材料。然而，CuNWS的混合颗粒和表面氧化降低了电极的透过率和电导率。因此，对于高性能FTE来说，高纯度、无氧化的CuNW是至关重要的。利用纳米铜与纳米铜对十八胺的吸附亲和力不同而产生的亲水性差异，提出了一种在水-正己烷体系中提纯纳米铜的简便有效的方法。在相同方阻条件下，提纯的CuNW基FTE的透过率比未提纯的CuNW基FTE提高了约2%。将电极浸泡在冰醋酸中，除去电极表面的有机物和氧化物。经40 S处理后，方阻从105欧姆/平方英尺急剧下降到31欧姆/平方英尺，透过率达到85%。此外，CuNW基FTE导体表现出极好的柔韧性(在1000次弯曲循环后仍保持稳定)。在此基础上，进一步将CuNW基FTE应用于柔性透明加热器的制作。在10 V的电压下，加热器的温度达到73 °C，显示了该材料在各个领域的潜在应用。
Copper nanowires (Cu NWs) are considered an excellent alternative to indium tin oxide (ITO) in flexible transparency electrodes (FTEs). However, the mixed particles and surface oxidation of Cu NWs degrade the transmittance and conductivity of the electrodes. Therefore, highly purified Cu NWs without oxidation are vital for high-performance FTEs. Herein, a facile and effective purification process is introduced to purify Cu NWs in a water and n-hexane system, which takes advantage of the differences in hydrophilicity between Cu NWs and Cu NPs caused by their different adsorption affinities to octadecylamine (ODA). At the same sheet resistance, the transmittance of the purified Cu NW-based FTEs improved approximately 2% compared to that of non-purified Cu NW-based FTEs. Immersion of the electrode in glacial acetic acid removed the surface organics and oxides. After only 40 s of treatment, the sheet resistance dramatically decreased from 105Ohm/sq to 31 Ohm/sq with a transmittance of 85%. In addition, the Cu NW-based FTE conductors showed excellent flexibility (remaining stable after 1000 bending cycles). The Cu NW-based FTEs were further applied to fabricate a flexible transparent heater. At a voltage of 10 V, the temperature of the heater reached 73 °C, demonstrating the potential applications of this material in various fields.