Nanoshaping of glass forming metallic liquids by stretching: Evading lithography

Zhonglue Hu, Chandra Sekhar Meduri, Jerzy Blawzdziewicz, Golden Kumar

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

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.

Original languageEnglish
Article number075302
JournalNanotechnology
Volume30
Issue number7
DOIs
StatePublished - Feb 15 2019

Keywords

  • fiber drawing
  • metallic glass
  • nanofabrication

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