Single-walled carbon nanotubes covalently functionalized with polytyrosine: A new material for the development of NADH-based biosensors

Eguílaz, Marcos; Gutiérrez, Fabiana; González‐Domínguez, José M.; Martínez, María Teresa; Rivas, Gustavo A.

doi:10.1016/j.bios.2016.06.003

Cited by 59 publications

(26 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These low values indicate very slow kinetics of the NAD + reduction reaction on a glassy carbon electrode and reflect the over potential necessary for the redox reaction which is related to both redox kinetics and mass transport. One strategy employed to overcome these difficulties (fouling and overvoltage and side reactions) was the use of mediator-modified electrodes, where the mediators are used to shuttle electrons from NADH to the electrode surface and allow electron transport between them [5,[9][10][11][12][13][14][15][16]. Some mediators (electrocatalysts) were immobilized on the electrode surface by covalent attachment, electrochemical polymerization, incorporation in carbon paste, adsorption, self-assembly and via entrapment in polymeric matrices [4,[17][18][19].…”

Section: David Publishingmentioning

confidence: 99%

“…Some mediators (electrocatalysts) were immobilized on the electrode surface by covalent attachment, electrochemical polymerization, incorporation in carbon paste, adsorption, self-assembly and via entrapment in polymeric matrices [4,[17][18][19]. Another strategy is modification of the electrode surface with a polymeric substance, using electrodes modified with carbon nanotubes, nanofibers or using enzymatic methods that follow bioelectrocatalytic reaction [2,4,13,15,16,[20][21][22][23]. Investigation in this area usually explores the mediator use or the surface modification to improve the electrochemical detection [15,21,[24][25][26][27][28].…”

Section: David Publishingmentioning

confidence: 99%

“…Another strategy is modification of the electrode surface with a polymeric substance, using electrodes modified with carbon nanotubes, nanofibers or using enzymatic methods that follow bioelectrocatalytic reaction [2,4,13,15,16,[20][21][22][23]. Investigation in this area usually explores the mediator use or the surface modification to improve the electrochemical detection [15,21,[24][25][26][27][28]. Some literature has been published related to the study of the redox couple NADH/NAD + in screen printing electrodes [1,4,21,[24][25][26][27][29][30][31][32][33][34].…”

Section: David Publishingmentioning

confidence: 99%

See 2 more Smart Citations

A Simple Procedure to Fabricate Paper Biosensor and Its Applicability—NADH/NAD+ Redox System

Ribau¹,

Fortunato²

2018

JPP

View full text Add to dashboard Cite

Abstract:A simple device which incorporates three electrodes (working electrode, counter electrode and reference electrode) was constructed to be used currently in laboratories without elevated cost. It does not need more than 2 µL of electrolyte, sample or working solution, his support material is paper, and the working electrode which is based on carbon ink can incorporate enzymes and cofactors. To test this concept we started this investigation using the NADH/NAD + redox couple which is an omnipresent coenzyme in living systems but is also a challenge to electrochemistry. The paper sensor fabrication was simple, rapid and cheaper. NADH was incorporated in the carbon ink by mixing both and, this mixture was used to print the working electrode. The direct electrochemical system NADH/NAD + signal obtained, using this device, appeared at low potentials. A quasi-reversible diffusional redox process was achieved and regeneration of the NADH after oxidation was reached. This small paper device was not only used to study the redox process of NAD + /NADH, but also its behavior in the presence of electroactive (ascorbic acid) and non-eletroactive species (glucose).

show abstract

Section: David Publishingmentioning

confidence: 99%

Section: David Publishingmentioning

confidence: 99%

Section: David Publishingmentioning

confidence: 99%

See 1 more Smart Citation

A Simple Procedure to Fabricate Paper Biosensor and Its Applicability—NADH/NAD+ Redox System

Ribau¹,

Fortunato²

2018

JPP

View full text Add to dashboard Cite

show abstract

“…Additionally, the superficial incorporation of organic [22,23] and inorganic molecules [24,25], metallic nanoparticles [26], biomolecules [27][28][29], and the nanocomposites of conducting polymers and CNTs [30,31] can increase the field of applications of CNTs in electroanalytical issues.…”

Section: Introductionmentioning

confidence: 99%

An Overview of Pesticide Monitoring at Environmental Samples Using Carbon Nanotubes-Based Electrochemical Sensors

Wong

Silva

Caetano

et al. 2017

View full text Add to dashboard Cite

Carbon nanotubes have received enormous attention in the development of electrochemical sensors by promoting electron transfer reactions, decreasing the work overpotential within great surface areas. The growing concerns about environmental health emphasized the necessity of continuous monitoring of pollutants. Pesticides have been successfully used to control agricultural and public health pests; however, intense use can cause a number of damages for biodiversity and human health. In this sense, carbon nanotubes-based electrochemical sensors have been proposed for pesticide monitoring combining different electrode modification strategies and electroanalytical techniques. In this paper, we provide a review of the recent advances in the use of carbon nanotubes for the construction of electrochemical sensors dedicated to the environmental monitoring of pesticides. Future directions, perspectives, and challenges are also commented.

show abstract

“…In particular, electrode construction with carbon nanotubes, fullerene (C 60 ), graphene, and other carbon materials to increase surface area and conductivity has been attempted [18,19,20]. Most of these attempts focused on increasing electrode conductivity, which can not only improve detection sensitivity, but also lower the oxidation potential required for target molecule detection [1,21,22,23]. However, the sensing signal amplification by adsorption accumulation of target molecules on the conductive electrode has rarely been mentioned [24].…”

Section: Introductionmentioning

confidence: 99%

Direct Electrochemical Detection of Bisphenol A Using a Highly Conductive Graphite Nanoparticle Film Electrode

Dong

Liu

et al. 2017

Sensors

View full text Add to dashboard Cite

We developed an accurate and sensitive sensor for electrochemical detection of bisphenol A (BPA) with a high-conductivity graphite nanoparticle (GN) film electrode. The GNs consisted of several stacked graphene sheets and showed a homogenous spherical shape, high conductivity, large surface area and good adsorption properties to BPA. The constructed GN film electrode exhibited improved amperometric current responses such as decreased impedance and lowered BPA oxidation potential compared with those of a pristine electrode, and also possessed a large surface area to allow fast electron transfer and BPA accumulation. A pre-accumulation process with BPA adsorption resulted in considerable current signal enhancement during BPA detection. The loading amount of GNs on the film electrode and the time for target BPA enrichment were optimized. The GN film electrode-based sensor showed high reproducibility and high selectivity for BPA over other reagents. Differential pulse voltammetry experiments revealed that the concentrations of BPA were linearly correlated with the current changes, and the lowest limit of detection of the sensor was 35 nM. Furthermore, the sensor showed great accuracy and reliability, as confirmed by high-performance liquid chromatography measurements. The sensor was also successfully used for BPA determination in groundwater samples, demonstrating its potential for real environmental analysis.

show abstract

Single-walled carbon nanotubes covalently functionalized with polytyrosine: A new material for the development of NADH-based biosensors

Cited by 59 publications

References 56 publications

A Simple Procedure to Fabricate Paper Biosensor and Its Applicability—NADH/NAD+ Redox System

A Simple Procedure to Fabricate Paper Biosensor and Its Applicability—NADH/NAD+ Redox System

An Overview of Pesticide Monitoring at Environmental Samples Using Carbon Nanotubes-Based Electrochemical Sensors

Direct Electrochemical Detection of Bisphenol A Using a Highly Conductive Graphite Nanoparticle Film Electrode

Contact Info

Product

Resources

About