Self-assembly of particles into 2D lattices with adaptable spacing

N. Aubry, S. Nudurupati, M. Janjua, Pushpendra Singh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

It was recently shown in [1-3] that spherical particles floating on a fluid-fluid interface can be self-assembled, and the lattice between them can be controlled, using an electric field. The technique works for a broad range of fluids and particles, including electrically neutral (i.e., uncharged) particles and small particles (micro- and nano-sized particles). In this paper we show that the technique also works for rod-like and cubical particles floating on fluid-fluid interfaces. The method consists of sprinkling particles at a liquid interface and applying an electric field normal to the interface, thus resulting in a combination of hydrodynamic (capillary) and electrostatic forces acting on the particles. It is shown that the relative orientation of two rod-like particles can be controlled by applying an electric field normal to the interface. The lattice spacing of the self-assembled monolayer of rods can be increased by increasing the electric field strength. Furthermore, experiments show that there is a tendency for the rods to align so that they are parallel to each other. The alignment however is not complete. Similarly, the spacing between two cubes, as well as the spacing of a monolayer of cubes, can be adjusted by controlling the electric field strength.

Original languageEnglish (US)
Title of host publication2008 Proceedings of the ASME Fluids Engineering Division Summer Conference, FEDSM 2008
Pages403-411
Number of pages9
Volume1
EditionPART A
DOIs
StatePublished - Sep 18 2009
Event2008 ASME Fluids Engineering Division Summer Conference, FEDSM 2008 - Jacksonville, FL, United States
Duration: Aug 10 2008Aug 14 2008

Other

Other2008 ASME Fluids Engineering Division Summer Conference, FEDSM 2008
CountryUnited States
CityJacksonville, FL
Period8/10/088/14/08

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

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