两种DNA分子同时检测的逻辑门及半加器的构建
本文选题:DNA分子逻辑门 切入点:电化学检测 出处:《分析科学学报》2017年06期
【摘要】:本研究利用滴涂法和电沉积法构建了氧化石墨烯/金纳米粒子复合膜修饰电极(GCE/GO/AuNPs),基于目标DNA和探针结合前后探针在电极表面构型的变化导致电化学信号变化,实现对大肠杆菌(E.coli)DNA和沙门氏菌(Sal)DNA的智能识别。以目标物为输入信号,分别以Σ|ΔI|和|ΔIMB/ΔIFc|为输出,构建了"AND"型和"XOR"型DNA分子逻辑门,提出了一种新型的可用于逻辑运算的半加器模型。采用方波伏安法(SWV)检测两种标记探针电流变化值Σ|ΔI|,其与E.coli DNA和Sal DNA浓度的对数值在1.0×10~(-13)~1.0×10~(-8) mol·L~(-1)范围内呈现良好的线性关系,检出限(S/N=3)分别为3.2×10~(-14) mol·L~(-1)和1.7×10~(-14) mol·L~(-1)。
[Abstract]:In this study, graphene oxide / gold nanoparticles composite film modified electrode was constructed by drop coating method and electrodeposition method. Based on the changes of the probe configuration on the electrode surface before and after the combination of the target DNA and the probe, the electrochemical signal was changed.Intelligent recognition of E. coli DNA and Salmonella Salmonella DNA was realized.Taking the target as input signal and 危 螖 I and 螖 IMB/ 螖 IFc as outputs, the molecular logic gates of "AND" type and "XOR" type of DNA are constructed, and a new semi-adder model for logic operation is proposed.
【作者单位】: 宁夏大学化学化工学院省部共建煤炭高效利用与绿色化工国家重点实验室;
【基金】:国家自然科学基金(No.21365016,21765017) 西部一流大学建设重大创新项目(No.2KZD2017003)
【分类号】:O657.1
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