基于Nafion-AuNPs复合膜的电化学传感器用于HIV基因的高灵敏检测
Highly Sensitive Detection of HIV Based on Nafion-AuNPs Composite Film Modified DNA Electrochemical Biosensor
DOI: 10.12677/AAC.2017.74030, PDF,    科研立项经费支持
作者: 李哲建, 樊雪梅, 王书民, 刘 萍, 王毅梦, 刘 倩:商洛学院化学工程与现代材料学院,陕西 商洛
关键词: 纳米金DNA电化学交流阻抗人类免疫缺陷病毒基因AuNPs DNA Electrochemical Impedance HIV Gene
摘要: 将合成制备的纳米金粒子(AuNPs),通过Nafion (全氟代磺酸醋)的成膜效应将纳米金固定在玻碳电极(GCE)表面,制得的AuNPs/Nafion/GCE修饰电极成为DNA固定和检测的良好平台。以电化学交流阻抗法检测目标DNA,目标DNA的单链与固定于电极表面的单链DNA探针杂交后使电极表面的电子传递电阻增大,以此作为检测信号可以高灵敏度地测定目标DNA。电化学阻抗法检测人类免疫缺陷病毒(HIV)基因片段的线性范围为1.0 × 10−11~1.0 × 10−6 mol/L,检测限为3.0 × 10−12 mol/L。
Abstract: AuNPs was immobilized on the glass carbon electrode via the film forming by Nafion. The developed AuNPs/Nafion/GCE electrode was a good platform of DNA immobilization and hybridization. Electrochemical impedance was applied to label-free detection of the target DNA according to the increase of the electron transfer resistance (Ret) of the electrode surface after the hybridization of the probe DNA with the target DNA. Under optimal conditions, the DNA biosensor showed a wide linear response to human immunodeficiency virus (HIV) gene in the range of 1.0 × 10−11~1.0 × 10−6 mol/L, with a detection limit of 3.0 × 10−12 mol/L of complementary target.
文章引用:李哲建, 樊雪梅, 王书民, 刘萍, 王毅梦, 刘倩. 基于Nafion-AuNPs复合膜的电化学传感器用于HIV基因的高灵敏检测[J]. 分析化学进展, 2017, 7(4): 228-233. https://doi.org/10.12677/AAC.2017.74030

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