A simple label-free electrochemical aptasensor for dopamine detection

RSC Advances ◽  
2014 ◽  
Vol 4 (94) ◽  
pp. 52250-52255 ◽  
Author(s):  
Jiawan Zhou ◽  
Wenyang Wang ◽  
Peng Yu ◽  
Erhu Xiong ◽  
Xiaohua Zhang ◽  
...  
Keyword(s):  
Electrochemical Biosensor ◽  
Dna Aptamer ◽  
Selective Detection ◽  
Label Free ◽  
Electrochemical Aptasensor ◽  
Dopamine Detection

A simple and label-free electrochemical biosensor based on a dopamine DNA aptamer was developed for the sensitive and selective detection of dopamine.

scholarly journals Fabrication of AuNPs/MWCNTS/Chitosan Nanocomposite for the Electrochemical Aptasensing of Cadmium in Water

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 105
Author(s):  
Selma Rabai ◽  
Ahlem Teniou ◽  
Gaëlle Catanante ◽  
Messaoud Benounis ◽  
Jean-Louis Marty ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Electrochemical Biosensor ◽  
Electrochemical Impedance ◽  
High Sensitivity ◽  
Label Free ◽  
Electrochemical Aptasensor ◽  
Applied Potential ◽  
Toxic Heavy Metals ◽  
Cadmium Detection ◽  
Interfering Ions

Cadmium (Cd2+) is one of the most toxic heavy metals causing serious health problems; thus, designing accurate analytical methods for monitoring such pollutants is highly urgent. Herein, we report a label-free electrochemical aptasensor for cadmium detection in water. For this, a nanocomposite combining the advantages of gold nanoparticles (AuNPs), carbon nanotubes (CNTs) and chitosan (Cs) was constructed and used as immobilization support for the cadmium aptamer. First, the surface of a glassy carbon electrode (GCE) was modified with CNTs-CS. Then, AuNPs were deposited on CNTs-CS/GCE using chrono-amperometry. Finally, the immobilization of the amino-modified Cd-aptamer was achieved via glutaraldehyde cross-linking. The different synthesis steps of the AuNPs/CNTs/CS nano assembly were characterized by cyclic voltammetry (CV). Electrochemical impedance spectroscopy (EIS) was employed for cadmium determination. The proposed biosensor exhibited excellent performances for cadmium detection at a low applied potential (−0.5 V) with a high sensitivity (1.2 KΩ·M−1), a detection limit of 0.02 pM and a wide linear range (10−13–10−4 M). Moreover, the aptasensor showed a good selectivity against the interfering ions: Pb2+; Hg2+ and Zn2+. Our electrochemical biosensor provides a simple and sensitive approach for Cd2+ detection in aqueous solutions, with promising applications in the monitoring of trace amounts of heavy metals in real samples.

A label-free electrochemical aptasensor based on leaf-like vanadium disulfide-Au nanoparticles for the sensitive and selective detection of platelet-derived growth factor BB

2015 ◽  
Vol 7 (19) ◽  
pp. 8277-8284 ◽  
Author(s):  
Xue Liu ◽  
Hong-Lei Shuai ◽  
Ke-Jing Huang
Keyword(s):  
Growth Factor ◽  
Hydrothermal Method ◽  
Au Nanoparticles ◽  
Platelet Derived Growth Factor ◽  
Sensitive Detection ◽  
Selective Detection ◽  
Label Free ◽  
Electrochemical Aptasensor ◽  
Facile Hydrothermal Method

In this work, an electrochemical aptasensor for the sensitive detection of platelet-derived growth factor BB (PDGF-BB) is fabricated based on leaf-like VS2 nanosheets which are prepared by a facile hydrothermal method.

Hierarchical Porous Fluorinated Graphene Oxide@Metal–Organic Gel Composite: Label-Free Electrochemical Aptasensor for Selective Detection of Thrombin

2018 ◽  
Vol 10 (48) ◽  
pp. 41089-41097 ◽  
Author(s):  
Veronika Urbanová ◽  
Kolleboyina Jayaramulu ◽  
Andreas Schneemann ◽  
Štěpán Kment ◽  
Roland A. Fischer ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Selective Detection ◽  
Label Free ◽  
Electrochemical Aptasensor ◽  
Hierarchical Porous ◽  
Metal Organic ◽  
Fluorinated Graphene ◽  
Organic Gel ◽  
Fluorinated Graphene Oxide

A label-free electrochemical biosensor based on a DNA aptamer against codeine

2013 ◽  
Vol 787 ◽  
pp. 203-210 ◽  
Author(s):  
Liangliang Huang ◽  
Xiaojuan Yang ◽  
Cui Qi ◽  
Xiaofang Niu ◽  
Chunling Zhao ◽  
...  
Keyword(s):  
Electrochemical Biosensor ◽  
Dna Aptamer ◽  
Label Free

A label-free electrochemical biosensor for highly sensitive and selective detection of DNA via a dual-amplified strategy

2014 ◽  
Vol 54 ◽  
pp. 442-447 ◽  
Author(s):  
Rong-Mei Kong ◽  
Zhi-Ling Song ◽  
Hong-Min Meng ◽  
Xiao-Bing Zhang ◽  
Guo-Li Shen ◽  
...  
Keyword(s):  
Electrochemical Biosensor ◽  
Selective Detection ◽  
Label Free ◽  
Highly Sensitive

Fabrication of electro-active nano-trans surfaces to design label free electrochemical aptasensor for ochratoxin A detection

2021 ◽  
Vol 379 ◽  
pp. 138172
Author(s):  
Maham Liaqat ◽  
Sara Riaz ◽  
Mian Hasnain Nawaz ◽  
Mihaela Badea ◽  
Akhtar Hayat ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Label Free ◽  
Electrochemical Aptasensor
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