A label-free electrochemistry biosensor based flower-like 3-dimensional ZnO superstructures for detection of DNA arrays
A label-free electrochemistry biosensor based flower-like 3-dimensional ZnO superstructures for detection of DNA arrays
复制标题
基于花状 3 维 ZnO 超结构的无标记电化学生物传感器,用于检测 DNA 阵列
DOI:
10.1039/c4nj01218f
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发表时间:
2014-11
影响因子:
3.3
通讯作者:
张秋禹
中科院分区:
文献类型:
--
作者:
张秋禹
A novel label-free DNA hybridization biosensor was fabricated using flower-like 3-dimensional (3D) ZnO superstructures as an enhanced sensing platform and employing chitosan (CS) as a film-forming material. A highly sensitive electrochemical DNA sensor was constructed by homogenously distributing Au nanoparticles (AuNPs) on the ZnO–CS matrix. The electrochemical performance of the designed electrodes was investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Differential pulse voltammetry (DPV) was used to monitor DNA hybridization. The AuNPs/ZnO–CS film exhibited good conductivity for accelerating the electron transfer, which led to obvious signal amplification and a low detection limit for electrochemical sensing. Under optimal conditions, the peak currents of the redox marker exhibited a linear relationship with the logarithm of the concentrations of complementary DNA from 1.0 × 10−14 to 1.0 × 10−10 M with a detection limit of 2.0 × 10−15 M (3σ/S). The developed sensor also displayed high selectivity to differentiate one-base mismatched DNA. The excellent performance of the biosensors was attributed to large surface-to-volume of ZnO superstructures and the synergistic effect of AuNPs and CS. The proposed approach provides a simple and reliable method for DNA detection and will open new opportunities for the sensitive detection of other nucleic acids.
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影响因子:
3.9
作者:
张秋禹
通讯作者:
张秋禹
影响因子:
8.4
作者:
Jie Yang;Xueliang Wang;Huaqiang Shi
通讯作者:
Jie Yang;Xueliang Wang;Huaqiang Shi
影响因子:
15
作者:
Muharnmad, Faheem;Guo, Mingyi;Zhu, Guangshan
通讯作者:
Zhu, Guangshan
DOI:
10.1016/j.jelechem.2011.06.024
发表时间:
2010-11
期刊:
2010 IEEE Sensors
影响因子:
--
作者:
Y. Wang;Y. Bao;L. Lou;J. Li;W. Du;Z. Zhu;H. Peng;J.Z. Zhu
通讯作者:
Y. Wang;Y. Bao;L. Lou;J. Li;W. Du;Z. Zhu;H. Peng;J.Z. Zhu
影响因子:
12.6
作者:
Dong, Haifeng;Zhu, Zhu;Yan, Feng
通讯作者:
Yan, Feng