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Open AccessArticle

Assembly of Microparticles to Patterned Trenches Using the Depletion Volume Effect

1
Department Precision Mechanics, Faculty of Science and Engineering, Chuo University, Tokyo 112-8551, Japan
2
Precision Engineering Course, Graduate School of Science and Engineering, Chuo University, Tokyo 112-8551, Japan
*
Author to whom correspondence should be addressed.
Micromachines 2019, 10(7), 428; https://doi.org/10.3390/mi10070428
Received: 5 June 2019 / Revised: 22 June 2019 / Accepted: 25 June 2019 / Published: 28 June 2019
(This article belongs to the Special Issue Self-Assembly of Microcomponents)
In this paper, we demonstrate that 20 μm microbeads can be preferentially assembled into substrate trenches of similar width by employing a polymer (depletant) that induces the depletion volume effect (depletion attraction). In previous works, we proved that this strategy is useful to assemble mesoscale parts in a site-specific manner. Here, we show that it is also applicable to assemble functional parts, such as fluorescent particles, into trenches engraved on the surface of two- and three-dimensional template components. A convenient advantage of this strategy is that it is independent of material properties for assembling mesoscale functional components into desired patterns. View Full-Text
Keywords: self-assembly; mesoscale assembly; three-dimensional assembly; depletion volume effect; excluded volume effect self-assembly; mesoscale assembly; three-dimensional assembly; depletion volume effect; excluded volume effect
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MDPI and ACS Style

Mori, Y.; Kawai, R.; Suzuki, H. Assembly of Microparticles to Patterned Trenches Using the Depletion Volume Effect. Micromachines 2019, 10, 428.

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