Related Experiment Video
Updated: Feb 26, 2026
08:32
Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting
Published on: May 14, 2016
13.0K
Exploiting the Marangoni Effect To Initiate Instabilities and Direct the Assembly of Liquid Metal Filaments
C A Hartnett1, I Seric2, K Mahady3
1Department of Physics & Astronomy, University of Tennessee , 1408 Circle Drive, Knoxville, Tennessee 37996, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|July 22, 2017
Summary
The Marangoni effect in liquid metals directs nanoparticle assembly by overcoming capillary forces. This study uses laser-induced surface tension gradients to guide material formation toward specific regions.
Area of Science:
- Materials Science
- Fluid Dynamics
- Nanotechnology
Background:
- The Rayleigh-Plateau instability governs liquid filament formation and breakup.
- Controlling instabilities is key for directed material assembly.
- The Marangoni effect, driven by surface tension gradients, can influence fluid behavior.
Purpose of the Study:
- To investigate the Marangoni effect for directed material assembly in liquid metals.
- To utilize Rayleigh-Plateau instability for controlled nanoparticle formation.
- To demonstrate Marangoni flow dominance over capillary flow in patterned thin films.
Main Methods:
- Lithographic patterning of thin copper (Cu) films on nickel (Ni) strips.
- Laser irradiation to induce melting and create a Ni-Cu surface tension gradient.
- Direct numerical simulations to support experimental findings.
Main Results:
- Marangoni flows were successfully induced in the Ni-Cu system.
- Marangoni flow exceeded initial capillary flow, directing instabilities.
- Nanoparticle assembly was guided towards regions of higher surface energy (Ni regions).
Conclusions:
- The Marangoni effect provides a viable route for manipulating surface instabilities.
- Directed pattern formation of nanoparticles is achievable using this method.
- This technique offers precise control over material assembly at the nanoscale.
