Whole cell environmental biosensor on diamond

Literature Information

Publication Date 2008-02-18
DOI 10.1039/B719881G
Impact Factor 4.616
Authors

Kwok Feng Chong, Kian Ping Loh, Kailian Ang


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Abstract

A whole-cell environmental biosensor was fabricated on a diamond electrode. Unicellular microalgae Chlorella vulgaris was entrapped in the bovine serum albumin (BSA) membrane and immobilized directly onto the surface of a diamond electrode for heavy metal detection. We found that the unique surface properties of diamond reduce the electrode fouling problem commonly encountered with metal electrodes. The cell-based diamond biosensor can attain a detection limit of 0.1 ppb for Zn2+ and Cd2+, and exhibits higher detection sensitivity and stability compared to platinum electrodes.

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