引用本文:
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.
Citation: 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.
Citation: 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.
DNA Nano-netting Intertexture on Carbon Electrodes
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.
English
DNA Nano-netting Intertexture on Carbon Electrodes
Abstract:
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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Key words:
- Calf thymus DNA
- / immobilization
- / carbon fiber electrode
- / electrochemical biosensor
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