A label-free ultrasensitive electrochemical DNA sensor based on thin-layer MoS2 nanosheets with high electrochemical activity

2015 ◽  
Vol 64 ◽  
pp. 386-391 ◽  
Author(s):  
Xinxing Wang ◽  
Fuxin Nan ◽  
Jinlong Zhao ◽  
Tao Yang ◽  
Tong Ge ◽  
...  
Keyword(s):  
Thin Layer ◽  
Electrochemical Activity ◽  
Dna Sensor ◽  
Label Free ◽  
Mos2 Nanosheets ◽  
Electrochemical Dna Sensor

Label-Free Electrochemical DNA Sensor for Enteroviruses Detection

2016 ◽  
Vol 14 (11) ◽  
pp. 1112-1116
Author(s):  
Ichrak Slama ◽  
Nabil Ben Salem Abid ◽  
Ines Othman ◽  
Ibtissem Ben Assaker ◽  
Radhouane Chtourou ◽  
...  
Keyword(s):  
Dna Sensor ◽  
Label Free ◽  
Electrochemical Dna Sensor

A label-free electrochemistry biosensor based flower-like 3-dimensional ZnO superstructures for detection of DNA arrays

2014 ◽  
Vol 38 (12) ◽  
pp. 5918-5924 ◽  
Author(s):  
Linxia Fang ◽  
Kejing Huang ◽  
Baoling Zhang ◽  
Yujie Liu ◽  
Qiuyu Zhang
Keyword(s):  
Au Nanoparticles ◽  
Dna Sensor ◽  
Label Free ◽  
Dna Arrays ◽  
3 Dimensional ◽  
Electrochemical Dna Sensor ◽  
Highly Sensitive

A highly sensitive electrochemical DNA sensor was constructed by homogenously distributing Au nanoparticles (AuNPs) on a flower-like 3D ZnO superstructure–chitosan (CS) matrix.

A label-free electrochemical DNA sensor based on ZrO2/poly(thionine)/CNT modified electrode and its application for detecting CaMV35S transgene gene sequence

2015 ◽  
Vol 7 (7) ◽  
pp. 3164-3168 ◽  
Author(s):  
Na Zhang ◽  
Keying Zhang ◽  
Li Zhang ◽  
Hongyan Wang ◽  
Hongwei Shi ◽  
...  
Keyword(s):  
Modified Electrode ◽  
Gene Sequence ◽  
Dna Sensor ◽  
Label Free ◽  
Schematic Representation ◽  
Electrochemical Dna Sensor ◽  
Hybridization Detection

Schematic representation of the immobilization of p-ssDNA and hybridization detection.

A label-free ratiometric electrochemical DNA sensor for monitoring intracellular redox homeostasis

2017 ◽  
Vol 53 (46) ◽  
pp. 6215-6218 ◽  
Author(s):  
Xinping Liu ◽  
Zhengqing Yan ◽  
Yuhuan Sun ◽  
Jinsong Ren ◽  
Xiaogang Qu
Keyword(s):  
Redox Homeostasis ◽  
Electrochemical Determination ◽  
Dna Sensor ◽  
Label Free ◽  
Electrochemical Dna Sensor ◽  
Intracellular Redox

A label-free ratiometric electrochemical determination of GSH by DNA metallization-mediated HCR amplification is reported.

Multi-walled Carbon Nanotubes/Manganese Dioxide Nano- flowers-like/Polyaniline Nanowires Nanocomposite Modified Electrode: A New Platform for a Highly Sensitive Electrochemical Impedance DNA Sensor

2021 ◽  
Author(s):  
Tuan Chu ◽  
Luyen Thi Tran ◽  
Hoang Vinh Tran ◽  
Trung Tran ◽  
Nghia Trong Nguyen ◽  
...  
Keyword(s):  
Electrochemical Impedance ◽  
Dna Sensor ◽  
Label Free ◽  
Dna Sensors ◽  
Electrochemical Dna Sensor ◽  
Target Dna ◽  
Highly Sensitive ◽  
Polyaniline Nanowires ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Abstract We describe in this report a development of label-free electrochemical DNA sensor based on a novel nanostructured electrode of multi-walled carbon nanotubes (MWCNTs)/ nano-flowers-like manganese dioxide (MnO2)/polyaniline nanowires (PANi NWs) nanocomposite. The nanocomposite was synthesized in-situ onto an interdigitated platinum microelectrode (Pt) using a combination of chemical and electrochemical synthesis methods: chemical preparation of MWCNTs/MnO2 and electropolymerization of PANi NWs. The fabricated MWCNTs/MnO2/PANi NWs was then used to develop a label-free electrochemical DNA sensor for a specific gene of Escherichia coli (E.coli) O157:H7 detection. The MWCNTs/MnO2/PANi NWs modified Pt electrode’s surface can facilitate for probe DNA strands immobilization and, therefore the electrochemical signal of the DNA sensors has been improved. The electrochemical impedance spectroscopy (EIS) measurements were conducted to investigate the output signals generated by the specific binding of probe and target DNA sequences. Obtained results indicated that the developed electrochemical biosensor can detect the target DNA in the linear range of 5 pM to 500 nM with a low limit of detection (LOD) at 4.42 × 10 –13 M. The research results demonstrated that the MWCNTs/MnO2/PANi NWs nanocomposite-based electrochemical DNA sensor has a great potential application to the development of highly sensitive and selective electrochemical DNA sensors to detect pathogenic agents.

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