Jump to main content
Jump to site search

Issue 21, 2009

Holographic fabrication of three-dimensional nanostructures for microfluidic passive mixing

Author affiliations

Abstract

In this study, we incorporated mixing units of three-dimensional (3D) interconnected pore network inside microfluidic channels by combining single prism holographic lithography and photolithography. 3D pore network structures were generated by the interference of four laser beams generated by a truncated triangular pyramidal prism. The levelling between the 3D porous structures and the channel walls was greatly improved by employing supercritical drying, which induced negligible internal capillary stresses and reduced substantially anisotropic volume shrinkage of 3D structures. Also, complete sealing of the microfluidic chips was achieved by attaching flexible PDMS cover substrates. Overall mixing performance of the systems with completely sealed mixing units was 84% greater than that obtained without such mixers. Splitting and recombination of flows in the 3D interconnected pore structures enhanced the mixing efficiency by decreasing the diffusion path and increasing the surface contact between two liquid streams. Because the flow splitting and recombination was developed through the 3D interconnected pore network, high mixing efficiency (>0.60) was achieved at low Reynolds numbers (Re < 0.05) and Péclet numbers in the regime of Pe < 1.4 × 103.

Graphical abstract: Holographic fabrication of three-dimensional nanostructures for microfluidic passive mixing

Supplementary files

Article information


Submitted
10 Jul 2009
Accepted
31 Jul 2009
First published
21 Aug 2009

Lab Chip, 2009,9, 3144-3150
Article type
Paper

Holographic fabrication of three-dimensional nanostructures for microfluidic passive mixing

S. Park, S. Lee, J. H. Moon and S. Yang, Lab Chip, 2009, 9, 3144 DOI: 10.1039/B913817J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements