| DNA Nano-netting Intertexture on Carbon Electrodes |
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| 作者姓名： | Xiang Qin LIN Xiao Hua JIANG Li Ping LU |
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| 作者单位： | Xiang Qin LIN，Xiao Hua JIANG，Li Ping LU Department of Chemistry，University of Science and Technology of China，Hefei 230026 |
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| 摘 要： | Native calf thymus double stranded DNA (ct-dsDNA) is successfully immobilized from solution onto carbon substrates by covalent linkages under an optimized deposition potential of 1 .8±0.3 V vs. 50 mmol/L NaCl-Ag/AgCl. The long chain DNA fabricates a layer of well conductive nano-netting intertexture, which is stable in pH 14 alkaline solution and in boiling water. The ct-dsDNA modified carbon fiber disk electrode shows two to three orders of magnitude enlarged electrode effective surface area and similarly enlarged voltammetric responses to Co(phen)33+ and dopamine. Thermal dissociated single stranded ct-DNA can also lead to similar result. This modified electrode will find wide applications in the fields of DNA-based electrochemical biosensors.
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| 关 键 词： | 小牛胸腺DNA 碳纤维电极 固定作用 电化学 生物传感器 |
DNA Nano-netting Intertexture on Carbon Electrodes |
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| Xiang Qin LIN,Xiao Hua JIANG,Li Ping LU.DNA Nano-netting Intertexture on Carbon Electrodes[J].Chinese Chemical Letters,2004,15(8):997-1000. |
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| Authors: | Xiang Qin LIN Xiao Hua JIANG Li Ping LU |
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| Institution: | Xiang Qin LIN,Xiao Hua JIANG,Li Ping LU Department of Chemistry,University of Science and Technology of China,Hefei 230026 |
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| Abstract: | |
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| Keywords: | Calf thymus DNA iramobilization carbon fiber electrode electrochemical biosensor |
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