Nanoshaping of glass forming metallic liquids by stretching: evading lithography
Nanoshaping of glass forming metallic liquids by stretching: evading lithography
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DOI：
10.1088/1361-6528/aaf3db
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发表时间：
2019-02-15
期刊：
影响因子：
3.5
通讯作者：
Kumar, Golden
中科院分区：
文献类型：
--
作者：
Hu, Zhonglue;Meduri, Chandra Sekhar;Kumar, Golden
提出了一种通过拉伸和断裂玻璃形成的金属液体进行无光刻纳米制造的方法。约束在腔体中的粘性金属液体通过拉伸横向缩小到纳米级。可以通过调节液体的有效体积以及粘性应力和毛细应力来控制尺寸减小的程度。可以在不使用光刻或昂贵模具的情况下制造出非常高纵横比的金属纳米结构。利用玻璃成形的铂铜镍磷合金，系统地研究了粘度、表面张力、拉速和空穴尺寸对柱状液柱在拉伸下的演化过程的影响。用基于润滑理论和表面张力诱导液丝断裂的唯象模型对实验结果进行了定量描述。针对复杂几何形状的制造，提出了一种基于金属液体变拉速和/或旋压的制造方法。
Lithography-free nanomanufacturing by elongation and fracture of glass forming metallic liquid is presented. The viscous metallic liquid confined in a cavity is laterally downsized to nanoscale by stretching. The extent of size-reduction can be controlled by tuning the active volume of liquid and the viscous and capillary stresses. Very high aspect-ratio metal nanostructures can be fabricated without using lithography or expensive molds. A systematic study is performed using glass forming Pt-Cu-Ni-P alloy to understand the effects of viscosity, surface tension, pulling velocity, and cavity size on the evolution of cylindrical liquid column under tension. The results are quantitatively described using a phenomenological model based on lubrication theory and surface tension induced breakup of liquid filaments. A new manufacturing approach based on variable pulling velocity and/or spinning of metallic liquid is proposed for fabrication of complex geometries.