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Open Access Nano Express

Investigations on antibody binding to a micro-cantilever coated with a BAM pesticide residue

Michael Bache1*, Rafael Taboryski1, Silvan Schmid1, Jens Aamand2 and Mogens Havsteen Jakobsen1

Author affiliations

1 Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Building 345 East, 2800 Kongens Lyngby, Denmark

2 Department of Geochemistry, Geological Survey of Denmark and Greenland (GEUS), Øster voldgade 10, DK-1350 Copenhagen K, Denmark

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Citation and License

Nanoscale Research Letters 2011, 6:386  doi:10.1186/1556-276X-6-386

Published: 16 May 2011

Abstract

The attachment of an antibody to an antigen-coated cantilever has been investigated by repeated experiments, using a cantilever-based detection system by Cantion A/S. The stress induced by the binding of a pesticide residue BAM (2,6 dichlorobenzamide) immobilized on a cantilever surface to anti-BAM antibody is measured using the CantiLab4© system from Cantion A/S with four gold-coated cantilevers and piezo resistive readout. The detection mechanism is in principle label-free, but fluorescent-marked antibodies have been used to subsequently verify the binding on the cantilever surface. The bending and increase in mass of each cantilever has also been investigated using a light interferometer and a Doppler Vibrometer. The system has been analyzed during repeated measurements to investigate whether the CantiLab4© system is a suited platform for a pesticide assay system.