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  • Title: Rapid detection of Escherichia coli by using antibody-conjugated silver nanoshells.
    Author: Kalele SA, Kundu AA, Gosavi SW, Deobagkar DN, Deobagkar DD, Kulkarni SK.
    Journal: Small; 2006 Mar; 2(3):335-8. PubMed ID: 17193045.
    Abstract:
    Silver shells of 20 nm thickness have been deposited on silica particles of 200 nm diameter with narrow size distribution. Silver nanoshells dispersed in water exhibit a strong surface plasmon resonance band at 443 nm. This band was found to be very sensitive to rabbit immunoglobulin G antibodies, which were anchored on the nanoshells. These in turn could be utilized to detect the presence of small (approximately 5) to large numbers (approximately 10(9)) of Escherichia coli in water. The protocol presented here proves to be a specific, rapid, reliable, and inexpensive method to detect E. coli.
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