Label free, electrochemical detection of atrazine using electrospun Mn2O3 nanofibers: Towards ultrasensitive small molecule detection

Supraja, P.; Tripathy, Suryasnata; Vanjari, Siva Rama Krishna; Singh, Vikrant

doi:10.1016/j.snb.2019.01.060

Cited by 57 publications

(24 citation statements)

References 59 publications

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“…Moreover, nanomaterials, such as NPs, carbon nanotubes, or graphene, can act as nanovehicles on the surface of which antibodies or electrochemical labels are coimmobilized, thus improving sensor performance [3]. Various nanomaterials and their nanocomposites have been proposed including gold nanoparticles [51], gold nanorods [52], metal oxide nanofiber [53], nanostructured mineral [54], carbon nano-onions [55] and microporous carbon spheres [56]. Metal–organic frameworks were also reported in the construction of immunosensors in order to encapsulate QDs and form multi-core-shell nanoparticles [50].…”

Section: Electrochemical Sensing Mechanismsmentioning

confidence: 99%

Electrochemical Immunosensors for Antibiotic Detection

2019

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Antibiotics are an important class of drugs destined for treatment of bacterial diseases. Misuses and overuses of antibiotics observed over the last decade have led to global problems of bacterial resistance against antibiotics (ABR). One of the crucial actions taken towards limiting the spread of antibiotics and controlling this dangerous phenomenon is the sensitive and accurate determination of antibiotics residues in body fluids, food products, and animals, as well as monitoring their presence in the environment. Immunosensors, a group of biosensors, can be considered an attractive tool because of their simplicity, rapid action, low-cost analysis, and especially, the unique selectivity arising from harnessing the antigen–antibody interaction that is the basis of immunosensor functioning. Herein, we present the recent achievements in the field of electrochemical immunosensors designed to determination of antibiotics.

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Section: Electrochemical Sensing Mechanismsmentioning

confidence: 99%

Electrochemical Immunosensors for Antibiotic Detection

2019

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“…DNA hybridization was detected using a glassy carbon electrode and cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse voltammetry. In all three methods, the hybridization of the DNA was observed, and this shows that both resistive or capacitive setups can be used [139].…”

Section: Electrospun Label-free Sensorsmentioning

confidence: 99%

“…The fibers were made by electrospinning a 5% of manganese (III) acetate tetrahydrate solution mixed with 7% (w/w) of polyacrylonitrile and N, N-dimethylformamide. The spun fibers were then calcinated at 550 °C using a muffle furnace to form metal oxide fibers [139]. Later, biosensors were also made by immobilizing an anti-atrazine-antibody to the fiber’s surface; fibers were placed on a glassy carbon working electrode (GCE/MNF).…”

Section: Electrospun Label-free Sensorsmentioning

confidence: 99%

Electrospun Nanofibers for Label-Free Sensor Applications

Aliheidari

Aliahmad

Agarwal

et al. 2019

Sensors

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Electrospinning is a simple, low-cost and versatile method for fabricating submicron and nano size fibers. Due to their large surface area, high aspect ratio and porous structure, electrospun nanofibers can be employed in wide range of applications. Biomedical, environmental, protective clothing and sensors are just few. The latter has attracted a great deal of attention, because for biosensor application, nanofibers have several advantages over traditional sensors, including a high surface-to-volume ratio and ease of functionalization. This review provides a short overview of several electrospun nanofibers applications, with an emphasis on biosensor applications. With respect to this area, focus is placed on label-free sensors, pertaining to both recent advances and fundamental research. Here, label-free sensor properties of sensitivity, selectivity, and detection are critically evaluated. Current challenges in this area and prospective future work is also discussed.

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“…Insecticides are commonly monitored environmental chemicals [1][2][3]. Fipronil is an insecticide that belongs to N-phenylpyrazole group and acts as an ectoparasiticide agent [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Facile, Sensitive and Rapid Sensing Platform Based on CoZnO for Detection of Fipronil; an Environmental Toxin

et al. 2020

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A sensitive detection of extremely toxic phenylpyrazole insecticide, ‘Fipronil’ is presented. Currently, the advancement of approaches for the detection of insecticides at low concentrations with less time is important for environmental safety assurance. Considering this fact, an effort has been made to develop an electrospun CoZnO nanofiber (NF) based label‐free electrochemical system for the detection of fipronil. The CoZnO NF were characterized using different techniques including field emission scanning electron microscopy (FE‐SEM), Energy Dispersive X‐Ray Analysis (EDX), X‐ray diffraction (XRD), Fourier‐transform infrared spectroscopy (FTIR), and Raman Spectroscopy. Based on the experimental results, the proposed platform displayed a linear response for fipronil in the attogram/mL range despite the multiple interfering agents. The sensitivity of the device was found to be 3.99 KΩ (g/ml)−1 cm−2. Limit of detection (LOD) and limit of quantification (LOQ) were calculated and found to be 112 ag mL−1 and 340 ag mL−1 respectively. Further, this proposed sensor will be implemented in the fields for the rapid and proficient detection of the real samples.

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Label free, electrochemical detection of atrazine using electrospun Mn2O3 nanofibers: Towards ultrasensitive small molecule detection

Cited by 57 publications

References 59 publications

Electrochemical Immunosensors for Antibiotic Detection

Electrochemical Immunosensors for Antibiotic Detection

Electrospun Nanofibers for Label-Free Sensor Applications

A Facile, Sensitive and Rapid Sensing Platform Based on CoZnO for Detection of Fipronil; an Environmental Toxin

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