The fabrication of nanotips has been driven by the increasing industrial demands in developing high-performance multifunctional nanodevices. In this work, we proposed a controlled, rapid as well as low cost nanomolding-necking technology to fabricate gold nanotips arrays. The geometries of gold nanotips with cone angle range of ~28-84° and curvature radii of < 5 nm can be prepared by tailoring the diameters of raw nanorods in nanomolding process or modulating the necking temperature. Molecular dynamics simulation reveals that the formation of the nanotip geometries are determined by the interplay between dislocation-based and diffusion-based deformation mechanisms, intrinsically arising from the nonlinear dependence of atom diffusion on temperature and sample size. The strong controllability, mass production and low-cost of the developed nanomolding-necking technology make it highly promising in developing nanodevices for a wide range of applications, such as probing, sensing, antireflection coating and nanoindentation.

中文翻译：

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Nanomolding-Necking 技术控制制备金纳米尖端阵列

纳米尖端的制造是由开发高性能多功能纳米器件的工业需求不断增长驱动的。在这项工作中，我们提出了一种可控、快速且低成本的纳米成型颈缩技术来制造金纳米尖端阵列。锥角范围为 ~28-84° 且曲率半径 < 5 nm 的金纳米尖端的几何形状可以通过在纳米成型过程中定制原始纳米棒的直径或调节颈缩温度来制备。分子动力学模拟表明，纳米尖端几何形状的形成是由基于位错和基于扩散的变形机制之间的相互作用决定的，本质上是由原子扩散对温度和样品尺寸的非线性依赖性引起的。可控性强，