EMAIL THIS PAGE TO A FRIEND

Biosensors & bioelectronics

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


PMID 25797851

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.

Related Materials

Product #

Image

Description

Molecular Formula

Add to Cart

234192
1-Hexanethiol, 95%
C6H14S
739286
1-Hexanethiol, 99% (GC)
C6H14S
451088
6-Mercapto-1-hexanol, 97%
C6H14OS
725226
6-Mercapto-1-hexanol, 99%
C6H14OS
T1378
Sigma 7-9®, ≥99% (titration), crystalline
C4H11NO3
154563
Tris(hydroxymethyl)aminomethane, ultrapure grade, ≥99.9%
C4H11NO3
RDD008
Trizma® base, anhydrous, free-flowing, Redi-Dri, ≥99.9%
C4H11NO3
T6066
Trizma® base, BioPerformance Certified, meets EP, USP testing specifications, cell culture tested, ≥99.9% (titration)
C4H11NO3
T6791
Trizma® base, BioXtra, pH 10.5-12.0 (1 M in H2O), ≥99.9% (titration)
C4H11NO3
T4661
Trizma® base, ≥99.9% (titration), crystalline
C4H11NO3
93362
Trizma® base, BioUltra, for molecular biology, ≥99.8% (T)
C4H11NO3
93350
Trizma® base, puriss. p.a., ≥99.7% (T)
C4H11NO3
33742
Trizma® base, puriss. p.a., buffer substance, ≥99.5%
C4H11NO3
T6687
Tromethamine, meets USP testing specifications
C4H11NO3
RES3137T-A7
Tromethamine, PharmaGrade, Manufactured under appropriate controls for use as a raw material in pharma or biopharmaceutical production., suitable for cell culture, meets USP testing specifications
C4H11NO3
RES3193T-A7
Tromethamine, PharmaGrade, Manufactured under appropriate controls for use as a raw material in pharma or biopharmaceutical production, suitable for cell culture, Meets USP, EP, JPC, BP testing specifications.
C4H11NO3