Direct Electron Transfer of Cytochrome c on ZrO<sub>2</sub> Nanoparticles Modified Glassy Carbon Electrode

Gholamreza Mohseni; Masoud Negahdary; Roya Malekzadeh; Jamal Manoochehri; Amirhossein Hadaegh; Arezou Sayad; Hajar Akbari-dastjerdi; Mohamad Fazilati; Saeed Rezaei-Zarchi

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Direct Electron Transfer of Cytochrome c on ZrO₂ Nanoparticles Modified Glassy Carbon Electrode

机译：ZrO _{2 纳米粒子修饰的玻碳电极上细胞色素c的直接电子转移}

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In this study we used of nanotechnology, electrochemistry and biology for investigation of directelectron transfer of cytochrome c (cyt c) on ZrO2 nanoparticles (Nps) modified glassy carbon electrode(GCE). Properties of Synthesized ZrO2 nanoparticles were investigated by X-ray diffraction (XRD)and UV-visible devices. Direct electrochemistry of the modified GCE with Cyt c and ZrO20 nanoparticles achieved and formal potential (E ) calculated as: -117.5 mV versus reference electrode.3+ Protein structure of cytochrome c with heme center could change oxidative iron state (Fe ) to2+ reductive state (Fe ) and vice versa by electron transfer. We used of this electron transfer in designinga biosensor for hydrogen peroxide (H2O2) detection. The linear dependence of cathodic peak on theH2O2 concentration was observed in the range of 40 to 270M; also designed biosensor showed a goodreproducibility and stability.

机译：在这项研究中，我们使用纳米技术，电化学和生物学研究了细胞色素c（cyt c）在ZrO2纳米粒子（Nps）修饰的玻碳电极（GCE）上的直接电子转移。通过X射线衍射（XRD）和紫外可见光器件研究了合成的ZrO2纳米粒子的性能。修饰的GCE与Cyt c和ZrO20纳米粒子的直接电化学反应得以实现，相对于参比电极的形式电势（E）计算为：-117.5mV。3+具有血红素中心的细胞色素c的蛋白质结构可将氧化铁态（Fe）变为2+还原态（Fe），反之亦然。我们在设计用于过氧化氢（H2O2）检测的生物传感器中使用了这种电子转移。在40至270M的范围内观察到阴极峰对H2O2浓度的线性依赖性。同时设计的生物传感器显示出良好的重现性和稳定性。

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《International Journal of Electrochemical Science》 |2012年第8期|共12页
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Gholamreza Mohseni; Masoud Negahdary; Roya Malekzadeh; Jamal Manoochehri; Amirhossein Hadaegh; Arezou Sayad; Hajar Akbari-dastjerdi; Mohamad Fazilati; Saeed Rezaei-Zarchi;
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Direct Electron Transfer of Cytochrome c on ZrO2 Nanoparticles Modified Glassy Carbon Electrode

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Direct Electron Transfer of Cytochrome c on ZrO₂ Nanoparticles Modified Glassy Carbon Electrode