Issue 18, 2013
From the journal:

Lab on a Chip

Size based sorting and patterning of microbeads by evaporation driven flow in a 3D micro-traps array†

Chee Chung Wong,*a   Yuxin Liu,ab   Karen Yanping Wanga  and  Abdur Rub Abdur Rahmana  

* Corresponding authors

a Institute of Microelectronics, Agency for Science Technology and Research, 11 Science Park Road, Singapore Science Park 2, Singapore 117685, Singapore
E-mail: wongcc@ime.a-star.edu.sg
Fax: +65 6773 1914
Tel: +65 6770 5644

b School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore

Abstract

We present a three-dimensional (3D) micro-traps array for size selective sorting and patterning of microbeads via evaporation-driven capillary flow. The interconnected micro-traps array was manufactured by silicon micromachining. Microliters of aqueous solution containing particle mixtures of different sized (0.2 to 20 μm diameter) beads were dispensed onto the micro-traps substrate. The smaller particles spontaneously wicked towards the periphery of the chip, while the larger beads were orderly docked within the micro-traps array.

Graphical abstract: Size based sorting and patterning of microbeads by evaporation driven flow in a 3D micro-traps array

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Article information

DOI
https://doi.org/10.1039/C3LC50274K
Article type
Technical Innovation
Submitted
26 Feb 2013
Accepted
02 Jul 2013
First published
03 Jul 2013

Lab Chip, 2013,13, 3663-3667

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Size based sorting and patterning of microbeads by evaporation driven flow in a 3D micro-traps array

C. C. Wong, Y. Liu, K. Y. Wang and A. R. A. Rahman, Lab Chip, 2013, 13, 3663 DOI: 10.1039/C3LC50274K

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