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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Supported protein G on gold electrode: Characterization and immunosensor application
Talanta, Volume 116, Year 2013
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Description
In this work, we study the electrochemical properties of protein layer grafted on gold electrode for C-reactive protein detection. Two CRP-antibody immobilization methods were used: the first method is based on direct physisorption of CRP-antibody onto the gold surface and the second method is based on oriented CRP-antibody with protein G intermediate layer. The two developed immunosensors were tested against CRP antigen in phosphate buffer saline solution and in human plasma. The electrochemical characterization of each immobilized layers was achieved by cyclic voltammetry and impedance spectroscopy. The morphology of the deposited biomolecules was observed by Atomic Force Microscopy and the roughness was measured. Moreover, contact angle measurement was used for wettability studies. The response of the developed immunosensors was reproducible, rapid, and highly stable and a detection limit of 100 fg/mL and 10 pg/mL antigen was observed with and without protein G respectively. The developed immunosensors was used for CRP detection in human plasma. © 2013 Elsevier B.V.
Authors & Co-Authors
Hafaiedh, Imen
Tunisia, Tunis
University of Carthage
Chammem, Hanen
Tunisia, Tunis
University of Carthage
Abdelghani, Adnane
Tunisia, Tunis
University of Carthage
Ait, Eric
France, Villetaneuse
Laboratoire Des Sciences Des Procédés et Des Matériaux
Feldman, Laurent J.
France, Paris
Inserm
France, Paris
Université Paris Cité
Meilhac, Olivier
France, Paris
Inserm
France, Paris
Ap-hp Assistance Publique - Hopitaux de Paris
Mora, Laurence
France, Villetaneuse
University Sorbonne Paris Nord
Statistics
Citations: 18
Authors: 7
Affiliations: 6
Identifiers
Doi:
10.1016/j.talanta.2013.04.059