Label-free impedimetric aptasensor for detection of femtomole level acetamiprid using gold nanoparticles decorated multiwalled carbon nanotube-reduced graphene oxide nanoribbon composites

Biosensors & Bioelectronics
Airong FeiKun Wang

Abstract

Gold nanoparticles (Au NPs) decorated multiwalled carbon nanotube-reduced graphene oxide nanoribbon (Au/MWCNT-rGONR) composites were synthesized by a one-pot reaction. By employing the resulting Au/MWCNT-rGONR composites as the support for aptamer immobilization, we developed an ultrasensitive label-free electrochemical impedimetric aptasensor for acetamiprid detection, which was based on that the variation of electron transfer resistance was relevant to the formation of acetamiprid-aptamer complex at the modified electrode surface. Compared with pure Au NPs and MWCNT-rGONR, the Au/MWCNT-rGONR composites modified electrode was the most sensitive aptasensing platform for the determination of acetamiprid. The proposed aptasensor displayed a linear response for acetamiprid in the range from 5×10(-14) M to 1×10(-5) M with an extremely low detection limit of 1.7×10(-14) M (S/N=3). In addition, this impedimetric aptasensor possessed great advantages including the simple operation process, low-cost, selectivity and sensitivity, which provided a promising model for the aptamer-based detection with a direct impedimetric method.

References

Nov 10, 2011·Nanoscale·Adeline Huiling LooMartin Pumera

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Citations

Jul 6, 2016·Frontiers in Chemistry·Franziska Pfeiffer, Günter Mayer
Oct 21, 2016·Archives of Toxicology·Shokoufeh HassaniMohammad Abdollahi
Dec 16, 2017·Sensors·Celine I L JustinoTeresa A P Rocha-Santos
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Apr 8, 2020·Biosensors·Beatriz Pérez-FernándezAlfredo de la Escosura- Muñiz
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Feb 10, 2019·Biosensors & Bioelectronics·Mei LiuNongyue He
Apr 26, 2021·Biosensors & Bioelectronics·Asha P JohnsonK Pramod
May 14, 2021·Critical Reviews in Analytical Chemistry·Mansour MahmoudpourJafar Ezzati Nazhad Dolatabadi
Jan 21, 2017·Analytical Chemistry·Yan Du, Shaojun Dong

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