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Hydrodynamic Trap for Directed Self-Assembly of MEMS

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Jürgen Brugger, Rosario Maurizio Gullo, Loïc Jacot-Descombes
2012

Abstract

This paper presents the realization of a hydrodynamic microfluidic trap with the goal of sorting MEMS for self-assembly experiments in liquid. A simplified analytical design rule has been compiled and numerically verified. Microfluidic devices have been fabricated in PDMS and PMMA beads have been trapped in a controlled way, validating the concept.

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https://infoscience.epfl.ch/entities/publication/f8e1cdc0-79ac-4040-b14f-6d243f74c75a

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Related concepts (12)

Self-assembly of nanoparticles

Nanoparticles are classified as having at least one of three dimensions be in the range of 1-100 nm. The small size of nanoparticles allows them to have unique characteristics which may not be possible on the macro-scale. Self-assembly is the spontaneous organization of smaller subunits to form larger, well-organized patterns. For nanoparticles, this spontaneous assembly is a consequence of interactions between the particles aimed at achieving a thermodynamic equilibrium and reducing the system’s free energy.

Droplet-based microfluidics

Droplet-based microfluidics manipulate discrete volumes of fluids in immiscible phases with low Reynolds number and laminar flow regimes. Interest in droplet-based microfluidics systems has been growing substantially in past decades. Microdroplets offer the feasibility of handling miniature volumes (μl to fl) of fluids conveniently, provide better mixing, encapsulation, sorting, sensing and are suitable for high throughput experiments.

Self-assembly is a process in which a disordered system of pre-existing components forms an organized structure or pattern as a consequence of specific, local interactions among the components themselves, without external direction. When the constitutive components are molecules, the process is termed molecular self-assembly. Self-assembly can be classified as either static or dynamic. In static self-assembly, the ordered state forms as a system approaches equilibrium, reducing its free energy.

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