Journal
NANOTECHNOLOGY
Volume 30, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aaf3db
Keywords
nanofabrication; metallic glass; fiber drawing
Funding
- National Science Foundation (NSF) [1663568]
- NSF Major Research Instrumentation Program [0421032]
- NSF-CAREER [1653938]
- Div Of Biological Infrastructure
- Direct For Biological Sciences [0421032] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1653938] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1663568] Funding Source: National Science Foundation
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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.
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