Mechanically Assisted Self‐Healing of Ultrathin Gold Nanowires,Small

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Mechanically Assisted Self‐Healing of Ultrathin Gold Nanowires
Small ( IF 13.0 ) Pub Date : 2018-04-17 , DOI: 10.1002/smll.201704085
Binjun Wang _{1,

2,

3} , Ying Han _{1,

2,

3} , Shang Xu _{1,

2,

3} , Lu Qiu _{4,

5} , Feng Ding _{4,

5} , Jun Lou ₆ , Yang Lu _{1,

2,

3}

Affiliation

As the critical feature sizes of integrated circuits approaching sub‐10 nm, ultrathin gold nanowires (diameter <10 nm) have emerged as one of the most promising candidates for next‐generation interconnects in nanoelectronics. Also due to their ultrasmall dimensions, however, the structures and morphologies of ultrathin gold nanowires are more prone to be damaged during practical services, for example, Rayleigh instability can significantly alter their morphologies upon Joule heating, hindering their applications as interconnects. Here, it is shown that upon mechanical perturbations, predamaged, nonuniform ultrathin gold nanowires can quickly recover into uniform diameters and restore their smooth surfaces, via a simple mechanically assisted self‐healing process. By examining the local self‐healing process through in situ high‐resolution transmission electron microscopy, the underlying mechanism is believed to be associated with surface atomic diffusion as evidenced by molecular dynamics simulations. In addition, mechanical manipulation can assist the atoms to overcome the diffusion barriers, as suggested by ab initio calculations, to activate more surface adatoms to diffuse and consequently speed up the self‐healing process. This result can provide a facile method to repair ultrathin metallic nanowires directly in functional devices, and quickly restore their microstructures and morphologies by simple global mechanical perturbations.

中文翻译：

机械辅助的超薄金纳米线自我修复

随着集成电路的关键特征尺寸接近10纳米，超薄金纳米线（直径<10纳米）已经成为纳米电子学中下一代互连的最有希望的候选者之一。但是，由于超小尺寸，超薄金纳米线的结构和形态在实际使用中更容易受到破坏，例如，瑞利不稳定性会在焦耳加热时显着改变其形态，从而阻碍了其作为互连的应用。此处表明，在机械扰动下，通过简单的机械辅助自修复过程，预损坏的不均匀超薄金纳米线可以迅速恢复为均匀直径并恢复其光滑表面。通过原位高分辨率透射电子显微镜检查局部自愈过程，分子动力学模拟证明了其潜在机制与表面原子扩散有关。此外，机械计算可以帮助原子克服从头算起的扩散障碍，从而激活更多的表面原子进行扩散，从而加快自愈过程。该结果可以提供一种简便的方法来直接在功能器件中修复超薄金属纳米线，并通过简单的整体机械扰动快速恢复其微结构和形态。机械处理可以帮助原子克服从头算起的扩散障碍，从而激活更多的表面原子以扩散，从而加快自愈过程。该结果可以提供一种简便的方法来直接在功能器件中修复超薄金属纳米线，并通过简单的整体机械扰动快速恢复其微结构和形态。机械处理可以帮助原子克服从头算起的扩散障碍，从而激活更多的表面原子以扩散，从而加快自愈过程。该结果可以提供一种简便的方法来直接在功能器件中修复超薄金属纳米线，并通过简单的整体机械扰动快速恢复其微结构和形态。

更新日期：2018-04-17

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