Bead-based immunoassays using a micro-chip flow cytometer

Holmes, David, She, J, Roach, P and Morgan, Hywel (2007) Bead-based immunoassays using a micro-chip flow cytometer Lab on a chip, 7, pp. 1048-1056.


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A microfabricated flow cytometer has been developed for the analysis of micron-sized polymer beads onto which fluorescently labelled proteins have been immobilised. Fluorescence measurements were made on the beads as they flowed through the chip. Binding of antibodies to surface-immobilised antigens was quantitatively assayed using the device. Particles were focused through a detection zone in the centre of the flow channel using negative dielectrophoresis. Impedance measurements of the particles (at 703 kHz) were used to determine particle size and to trigger capture of the fluorescence signal. Antibody binding was measured by fluorescence at single and dual excitation wavelengths (532 nm and 633 nm). Fluorescence compensation techniques were implemented to correct for spectral overspill between optical detection channels. The data from the microfabricated flow cytometer was shown to be comparable to that of a commercial flow cytometer (BD-FACSAria). Graphical abstract image for this article (ID: b707507n)

Item Type: Article
Additional Information: nonValidatingUrl:DOI: 10.1039/b707507n
Organisations: Nanoelectronics and Nanotechnology
ePrint ID: 266502
Date :
Date Event
Date Deposited: 04 Aug 2008 02:27
Last Modified: 17 Apr 2017 19:02
Further Information:Google Scholar

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