Biomimetic synthesis and characterization of cobalt nanoparticles using apoferritin, and investigation of direct electron transfer of Co(NPs)–ferritin at modified glassy carbon electrode to design a novel nanobiosensor
作者： Soheila Kashanian , Fereshteh Abasi Tarighat , Ronak Rafipour , Maryam Abbasi-Tarighat
DOI: 10.1007/S11033-012-1742-5
关键词: Electron transfer 、 Biosensor 、 Transmission electron microscopy 、 Nanoparticle 、 Redox 、 Circular dichroism 、 Cyclic voltammetry 、 Chemistry 、 Cobalt 、 Nuclear chemistry
摘要: Oxyhydroxy cobalt CoO(OH) nanoparticles (Co-NPs) were prepared in horse spleen apoferritin (HsAFr) cavity. Transmission electron microscopy revealed the particle size was 5.5–6 nm. Mineralization effect on HsAFr investigated by fluorescence and far-UV circular dichroism (far-UV CD) spectroscopies. The CD experiments indicated an increase α-helical content after mineralization. Intrinsic data showed that mineralization acts as a quencher of HsAFr. For first time, direct transfer between Co(NPs)–HsAFr glassy carbon electrode thin film dihexadecylphosphate (DHP) cyclic voltammetry (CV) to design biosensor. anionic surfactant DHP used achieve electron-transfer molecules GC surface. CV result clearly pair well-defined quasi-reversible redox peaks arise from embedded film. This novel biosensor can be medical industrial fields detect different analytes.
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