Immobilization of avidin on (001) GaAs surface |
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Authors: | X. Ding Kh. Moumanis J.J. Dubowski E.H. Frost E. Escher |
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Affiliation: | (1) Département de Génie électrique et de Génie Informatique, Université de Sherbrooke, J1K 2R1 Sherbrooke, Québec, Canada;(2) Département de Microbiologie et d’Infectiologie, Université de Sherbrooke, J1H 5N4 Sherbrooke, Québec, Canada;(3) Département de Pharmacologie, Université de Sherbrooke, J1H 5N4 Sherbrooke, Québec, Canada |
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Abstract: | To reliably immobilize different biomoieties on surfaces of III-V semiconductors is one of the most critical issues in the development of biodetector devices based on the optical/electronic properties of these materials. Herein we demonstrate the successful immobilization of avidin, a robust and well-studied protein, on a (001) GaAs surface. The immobilization was investigated via specific binding to biotin, which was connected to the GaAs surface through commercially available long- or short-chain amino group terminated alkanethiols (HS(CH2)11NH2 or HS(CH2)2NH2), or through a biotinylated thiol synthesized in our laboratory. The immobilization performance was evaluated by photoluminescence and fluorescence microscopy measurements. We found that the biotinylated thiol mixed with a diluent thiol provides the highest avidin immobilization efficiency. PACS 81.05.Ea; 82.65.+r; 87.14.Ee |
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