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Magnetic Core-Shell Fe3O4@Ag Nanoparticles Coated Carbon Paste Interface for Studies of Carcinoembryonic Antigen in Clinical Immunoassay

Dianping, Tang and Ruo, Yuan and Yaqin, Chai (2010) Magnetic Core-Shell Fe3O4@Ag Nanoparticles Coated Carbon Paste Interface for Studies of Carcinoembryonic Antigen in Clinical Immunoassay. Journal of Nanoparticle Research, 12 (4). pp. 1187-1196.

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Abstract

This study demonstrates a novel approach toward development of advanced immunosensors based on chemically functionalized core-shell Fe3O4@Ag magnetic nanoparticles, and the preparation, characterization, and measurement of relevant properties of the immunosensor useful for the detection of carcinoembryonic antigen (CEA) in clinical immunoassay. The immunosensor based on the combination of a magnetic nanocore and an Ag metallic shell shows good adsorption properties for the attachment of the CEA antibody selective to CEA. The core-shell nanostructure presents good magnetic properties to facilitate and modulate the way it was integrated into a carbon paste. Under optimal conditions, the resulting composite presents good electrochemical response for the detection of CEA, and allows detection of CEA at a concentration as low as 0.5 ng·mL-1. Importantly, the proposed methodology could be extended to the detection of other antigens or biocompounds.

Item Type:Article
Subjects:Physical Science > Nanomagnetics
Biomedical Science > Nanomedicine
ID Code:8872
Deposited By:CSMNT
Deposited On:07 Jul 2010 12:36
Last Modified:25 Aug 2010 10:57

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