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CT-DNA were electrochemically immobilized on the surfaces of both nano-goldmodified glassy carbon electrode and bare glassy carbon electrode. The cyclic voltammetricbehavior of Co (phen)33+adsorbed on the immobilized DNA was studied. Increase in the peakcurrent of Co (phen)33+ redox reaction was obtained on nano-gold modified glassy carbon electrode.The result suggests that more DNA molecules were immobilized on this electrode and nano-goldmodification can enhance the heterogeneous electron transfer rate constant of the Co (phen)33+.
CT-DNA were electrochemically immobilized on the surfaces of both nano-gold modified glassy carbon electrode and bare glassy carbon electrode. The cyclic voltammetric behavior of Co (phen) 33 + adsorbed on the immobilized DNA was studied. Increase in the peak current of Co (phen) 33+ redox reaction was obtained on nano-gold modified glassy carbon electrode. The resulting suggests that more DNA molecules were immobilized on this electrode and nano-gold modification could enhance the heterogeneous electron transfer rate constant of the Co (phen) 33+.