3D mapping of microfluidic flow in laboratory-on-a-chip structures using optical tweezers

Hasan Mushfique, Jonathan Leach, Huabing Yin, Roberto Di Leonardo, Miles J. Padgett, Jonathan M. Cooper

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Accurate measurement of flow in microfluidic systems is both challenging and important, providing information that can be used to better understand flow fields within laboratory-on-a-chip devices and validate computational simulations. Here, we use optical tweezers within a microfluidic system to measure the velocity vectors of flow fields in two and three dimensions around a microstructures including both molded features within channels and cells. The experimental results are compared to a complex fluid dynamics model showing an agreement between the two of better than 3 mu m/s. This measurement is highly reproducible and minimally invasive, which in the future could be used to provided more in-depth studies of the rheological properties of biological cells and microstructures in laboratory-on-a-chip devices.

Original languageEnglish
Pages (from-to)4237-4240
Number of pages4
JournalAnalytical Chemistry
Issue number11
Publication statusPublished - 1 Jun 2008

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