NDLI: Microparticle collection and concentration via a miniature surface acoustic wave device

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Lab on a Chip Vol - 7 Issue - 4

Lab on a Chip Vol - 7 Issue - 3

Lab on a Chip Vol - 7 Issue - 2

Microparticle collection and concentration via a miniature surface acoustic wave device

Content Provider	Royal Society of Chemistry (RSC)
Author	Yeo, Leslie Y. Tan, Ming K. Friend, James R.
Copyright Year	2007
Abstract	The ability to detect microbes, pollens and other microparticles is a critically important ability given the increasing risk of bioterrorism and emergence of antibiotic-resistant bacteria. The efficient collection of microparticles via a liquid water droplet moved by a surface acoustic wave (SAW) device is demonstrated in this study. A fluidic track patterned on the SAW device directs the water droplet's motion, and fluid streaming induced inside the droplet as it moves along is a key advantage over other particle collection approaches, because it enhances microparticle collection and concentration. Test particles consisted of 2, 10, 12 and 45 μm diameter monodisperse polystyrene and melamine microparticles; pollen from the Populus deltoides, Kochia scoparia, Secale cerale, and Broussonetia papyrifera (Paper Mulberry) species; and Escherichia coli bacteria. The collection efficiency for the synthetic particles ranged from 16 to 55%, depending on the particle size and surface tension of the collection fluid. The method was more effective in collecting pollen and the bacteria with an efficiency of 45–68% and 61.0–69.8%, respectively. Pollen collection was strongly influenced by its diameter, size, and surface geometry in a manner contrary to initial expectations. Reasons for the consistent yet unexpected collection results include leaky SAW pressure boundary segregation and shear-induced concentration of larger particles, and the subtle effects of wetting interactions. These results demonstrate a new method for collecting microparticles requiring only about one second per run, and illustrate the inadequacy of using synthetic microparticles as a substitute for their biological counterparts in experiments studying particle collection and behavior.
Starting Page	618
Ending Page	625
Page Count	8
File Format	HTM / HTML PDF
ISSN	14730197
Volume Number	7
Issue Number	5
Journal	Lab on a Chip
DOI	10.1039/b618044b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Dispersity Escherichia Broussonetia Paper mulberry Bassia scoparia Escherichia coli Bioterrorism Surface acoustic wave Polystyrene Geometry Test cricket Populus deltoides Micrometre Bacteria Microparticle Melamine resin Pollen Surface tension
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Biochemistry Bioengineering Biomedical Engineering

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Microparticle collection and concentration via a miniature surface acoustic wave device

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Microparticle collection and concentration via a miniature surface acoustic wave device