3D printing research targets the creation of nanostructures beyond the limits of traditional micromachining. A proper characterisation of their functionalities is necessary to facilitate future implementation into applications. We fabricate, in an open atmosphere, high-aspect-ratio gold nanowalls by electrohydrodynamic rapid nanodripping, and comprehensively analyse their electronic performance by four-point probe measurements. We reveal the large-grained nanowall morphology by transmission electron microscopy and explain the measured low resistivities approaching those of bulk gold. This work is a significant advancement in contactless bottom-up 3D nanofabrication and characterisation and could also serve as a platform for fundamental studies of additively manufactured high-aspect-ratio out-of-plane metallic nanostructures.

中文翻译：

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高导电金纳米壁的3D电流体动力学打印和表征。

3D打印研究的目标是创建超越传统微加工限制的纳米结构。必须对它们的功能进行适当的表征，以促进将来在应用程序中的实现。我们在敞开的气氛中通过电流体动力学快速纳米滴制造高纵横比的金纳米壁，并通过四点探针测量全面分析其电子性能。我们通过透射电子显微镜揭示了大颗粒的纳米壁形态，并解释了所测得的低电阻率接近散装金。这项工作是无接触自下而上的3D纳米制造和表征的一项重大进步，并且还可以作为基础平台来进行增材制造的高纵横比平面外金属纳米结构的基础研究。