Au-catalyzed ultrathin copper nanowires,Journal of Materials Chemistry A

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Au-catalyzed ultrathin copper nanowires
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-11-18 , DOI: 10.1039/d2ta07668c
Juan Xu ₁ , Xingzhong Zhu _{1,

2} , Sihao Xia _{1,

2} , Yang Liu ₁ , Caixia Kan _{1,

2} , Daning Shi _{1,

2}

Affiliation

Decreasing the diameter of copper nanowires has been proven to be an effective method to improve their optoelectronic performance by lessening light attenuation. There is as yet no published literature for producing copper nanowires with diameters below 10 nm. Herein, we report a general aqueous approach to the synthesis of ultrathin copper nanowires with average diameters as thin as 7 nm and aspect ratios of up to 1400 for the first time. The key to the success of this synthesis is the introduction of the five-fold twinned Au nanoparticles. The systematic investigation of the growth process reveals that the copper nanowires evolve from one side of the Au nanoparticles and adopt a penta-twinned structure because of the lattice mismatch between Cu and Au (11.4%), which is verified by first-principles calculations. The diameter and length of copper nanowires possess excellent tunability as the size of the Au nanoparticles varied. The fabricated transparent conductive films based on ultrathin copper nanowires exhibit excellent flexibility and optoelectronic properties.

中文翻译：

Au催化的超细铜纳米线

减小铜纳米线的直径已被证明是通过减少光衰减来提高其光电性能的有效方法。目前还没有关于生产直径小于 10 nm 的铜纳米线的公开文献。在此，我们首次报道了一种合成平均直径细至 7 nm、纵横比高达 1400 的超细铜纳米线的一般水性方法。这种合成成功的关键是引入了五重孪晶金纳米粒子。对生长过程的系统研究表明，由于 Cu 和 Au 之间的晶格失配 (11.4%)，铜纳米线从 Au 纳米颗粒的一侧演化并采用五孪晶结构，这已通过第一性原理计算得到验证。随着 Au 纳米粒子尺寸的变化，铜纳米线的直径和长度具有出色的可调性。基于超细铜纳米线制备的透明导电薄膜具有优异的柔韧性和光电性能。

更新日期：2022-11-18

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