Hybrid platinum nanoparticle ensemble for the electrocatalytic oxidation of H2O2: Toward nanostructured biosensor design

Challier, Lylian; Gal, François; Carrot, Géraldine; Pérez, H.; Noël, Vincent

doi:10.1016/j.elecom.2012.11.039

Cited by 5 publications

(8 citation statements)

References 19 publications

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“…The latter allows for fine-tuning of the thickness and also the physico-chemical properties of the organic corona (charge, hydrophobic/hydrophilic balance,...) and hence the ability to achieve Pt NPs dispersion within various matrices. Recent publication [11] shows that the electrocatalytic properties toward H2O2 oxidation are maintained despite the organic corona and efficient even at very low Pt NPs surface content.…”

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confidence: 99%

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Detection of Glutamate and Acetylcholine with Organic Electrochemical Transistors Based on Conducting Polymer/Platinum Nanoparticle Composites

et al. 2014

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The aim of the study is to open a new scope for organic electrochemical transistors based on PEDOT:PSS, a material blend known for its stability and reliability. These devices can leverage molecular electrocatalysis by incorporating small amounts of nano-catalyst during the transistor manufacturing (spin coating). This methodology is very simple to implement using the know-how of nanochemistry and results in efficient enzymatic activity transduction, in this case utilizing choline oxidase and glutamate oxidase.

Funding Agencies|EU [PIEF-GA-2011-301796]; Onnesjo foundation; Swedish Research Council [2002-4497]; Swedish Foundation for Strategic Research [IMF11-0052]; Knut and Alice Wallenberg Foundation [2012-0302]

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confidence: 99%

“…Indeed, it is well documented that a good dispersion of the platinum nanoparticles within a matrix leads to a better catalytic activity of the nanoparticles towards the oxidation of H2O2. [11] This could potentially reduce the limit of detection of our sensors.…”

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confidence: 99%

Detection of Glutamate and Acetylcholine with Organic Electrochemical Transistors Based on Conducting Polymer/Platinum Nanoparticle Composites

et al. 2014

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“…It is therefore likely that, first, each NPs played the role of independent nanocatalyst and second, the diffusion process was improved. 20 These phenomena are due to the particular nature of H 2 O 2 oxidation reaction, which is limited by both electronic transfer and matter diffusion. 28 Here, the study of well-defined structures indicates that one possibility of sensitivity improvement would be to make the sublayers of PtNPs accessible, i.e., to achieve a 3D porous structure.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…18 The advantage of this approach is also the possibility to further insert biomolecules via appropriate polymer functional groups, 19 while keeping the Pt core accessible for heterogeneous electron transfer reaction. 20 Indeed, polymer grafting will permit to fill all these requirements (lower grafting density, higher amount of functional groups), and to provide the requisite mobility to facilitate reactions and exchanges. However, beside requirements concerning nano-object features (individual properties), the way to organize these nano-objects onto a surface (collective behavior) also has a critical impact on the final electrocatalytic properties.…”

Section: ■ Introductionmentioning

confidence: 99%

Electrocatalytic (Bio)Nanostructures Based on Polymer-Grafted Platinum Nanoparticles for Analytical Purpose

Gal

Challier

Cousin

et al. 2016

ACS Appl. Mater. Interfaces

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Functionalized platinum nanoparticles (PtNPs) possess electrocatalytic properties toward H2O2 oxidation, which are of great interest for the construction of electrochemical oxidoreductase-based sensors. In this context, we have shown that polymer-grafted PtNPs could efficiently be used as building bricks for electroactive structures. In the present work, we prepared different 2D-nanostructures based on these elementary bricks, followed by the subsequent grafting of enzymes. The aim was to provide well-defined architectures to establish a correlation between their electrocatalytic properties and the arrangement of building bricks. Two different nanostructures have been elaborated via the smart combination of surface initiated-atom transfer radical polymerization (SI-ATRP), functionalized PtNPs (Br-PtNPs) and Langmuir-Blodgett (LB) technique. The first nanostructure (A) has been elaborated from LB films of poly(methacrylic acid)-grafted PtNPs (PMAA-PtNPs). The second nanostructure (B) consisted in the elaboration of polymer brushes (PMAA brushes) from Br-PtNPs LB films. In both systems, grafting of the glucose oxidase (GOx) has been performed directly to nanostructures, via peptide bonding. Structural features of nanostructures have been carefully characterized (compression isotherms, neutron reflectivity, and profilometry) and correlated to their electrocatalytic properties toward H2O2 oxidation or glucose sensing.

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“…They have low cost, facile synthesis, high stability and are easy to manipulate in the field of optical sensing . Different kinds of nanozymes such as carbon based, metallic, metal oxides, , and metal oxide nanocomposites have been employed to replace natural enzymes. Porous type nanomaterials are formed by interconnecting of large mesopores with surface, and structural defects have also shown enzyme-like activities .…”

Section: Introductionmentioning

confidence: 99%

Zinc-Doped Mesoporous Graphitic Carbon Nitride for Colorimetric Detection of Hydrogen Peroxide

Ahmed

John

Nawaz

et al. 2019

ACS Appl. Nano Mater.

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Recently, graphitic carbon nitride (g-C 3 N 4 ) has been explored as a peroxidase-like catalyst for the nonenzymatic colorimetric detection of H 2 O 2 . In this study, we have developed a simple, low cost, and eco-friendly hydrogen bond assisted soft template method of zinc ions doping in mesoporous graphitic-carbon-nitride (Zn-mpg-C 3 N 4 ) thin nanosheets. Morphology and composition of prepared samples were determined by different characterization techniques. PEG-1500 was beneficial to enhance the porosity and surface area of g-C 3 N 4 , whereas zinc loading in the framework of g-C 3 N 4 resulted in the increase in electrical properties. The peroxidase-like catalytic activity of samples was investigated and compared based on the development of blue reaction mixture by the oxidation reaction between 3,3′,5,5′-tetramethylbenzidine and hydrogen peroxide (H 2 O 2 ) through the colorimetric method. The as-prepared 10% Zn-mpg-C 3 N 4 has shown higher peroxidase-like activity as compared to natural HRP, g-C 3 N 4 , and mpg-C 3 N 4 . This enhanced peroxidase-like activity was attributed to the thin structured nanosheets, higher specific surface area, outstanding electron transfer ability, increased band gap, and increased in charge separation of the catalyst through the direct zinc ions doping modification. The steady-state kinetics mechanism was investigated by using Michaelis− Menten kinetics, and it was found that the reaction followed a ping-pong mechanism. This outstanding catalytic activity permitted us to design a rapid and convenient colorimetric sensing method to detect H 2 O 2 . Under the optimized condition, the developed sensor exhibited a linear range of 10−2000 μM (R 2 = 0.9981), limit of detection of 1.4 μM, and limit of quantification of 3.0 μM for H 2 O 2 detection. In view of advantages compared with previous methods such as simple, facile operation, cost-effectiveness, eco-friendliness, naked eye observation, and rapid response, the developed sensor possesses huge potential and is a promising candidate for enzyme mimic sensing of H 2 O 2 in environmental and biological samples.

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Hybrid platinum nanoparticle ensemble for the electrocatalytic oxidation of H2O2: Toward nanostructured biosensor design

Cited by 5 publications

References 19 publications

Detection of Glutamate and Acetylcholine with Organic Electrochemical Transistors Based on Conducting Polymer/Platinum Nanoparticle Composites

Detection of Glutamate and Acetylcholine with Organic Electrochemical Transistors Based on Conducting Polymer/Platinum Nanoparticle Composites

Electrocatalytic (Bio)Nanostructures Based on Polymer-Grafted Platinum Nanoparticles for Analytical Purpose

Zinc-Doped Mesoporous Graphitic Carbon Nitride for Colorimetric Detection of Hydrogen Peroxide

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