Direct printing of nanostructures by electrostatic autofocussing of ink nanodroplets
Direct printing of nanostructures by electrostatic autofocussing of ink nanodroplets
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DOI：
10.1038/ncomms1891
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发表时间：
2012-06-01
影响因子：
16.6
通讯作者：
Poulikakos, D.
中科院分区：
文献类型：
--
作者：
Galliker, P.;Schneider, J.;Poulikakos, D.
纳米技术对社会相关应用产生广泛影响，在很大程度上依赖于可用的纳米制造方法。尽管存在许多这样的技术，但功能性纳米结构的灵活、廉价、按需和可扩展的制造在很大程度上仍然难以实现。在这里，我们提出了一种方法，涉及纳米电流体动力学喷墨印刷，可能会显着地在这个方向上作出贡献。纳米级放置精度、软着陆流体动力学、快速溶剂蒸发和随后的油墨胶体内容物的自组装的组合导致形成具有等于单个喷射的纳米液滴的基部直径的基部直径的支架。纳米结构向第三维度的几乎与材料无关的生长然后由局部静电场增强引起的自动聚焦现象支配，从而导致大的纵横比。我们展示了我们的电流体动力印刷技术的能力与几个例子，包括制造等离子体纳米天线的功能尺寸下降到50纳米。
Nanotechnology, with its broad impact on societally relevant applications, relies heavily on the availability of accessible nanofabrication methods. Even though a host of such techniques exists, the flexible, inexpensive, on-demand and scalable fabrication of functional nanostructures remains largely elusive. Here we present a method involving nanoscale electrohydrodynamic ink-jet printing that may significantly contribute in this direction. A combination of nanoscopic placement precision, soft-landing fluid dynamics, rapid solvent vapourization, and subsequent self-assembly of the ink colloidal content leads to the formation of scaffolds with base diameters equal to that of a single ejected nanodroplet. The virtually material-independent growth of nanostructures into the third dimension is then governed by an autofocussing phenomenon caused by local electrostatic field enhancement, resulting in large aspect ratio. We demonstrate the capabilities of our electrohydrodynamic printing technique with several examples, including the fabrication of plasmonic nanoantennas with features sizes down to 50 nm.