Redox-labeled DNA was conjugated to and grafted to carbon and gold electrodes using the newly synthesized triazene linker. The chemical and electrochemical activation and deposition steps included using Me₂SO₄ reducing agent and further potentiostatically controlled deposition procedure. The produced DNA-modified electrodes exhibit remarkable DNA-hybridization properties which can be detected by a shift in the redox potential and they can easily be renewed by repeated hybridization/de-hybridization procedures. Electrochemical studies of surface coverage and DNA hybridization efficiency demonstrated that grafting through the triazene linker can successfully compete with existing protocols for DNA immobilization through the commonly used alkanthiol linkers and diazonium salts, while giving the practical advantage of one-step immobilization procedure. 

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