Electrodeposited honeycomb-like dendritic porous gold surface: An efficient platform for enzyme-free hydrogen peroxide sensor at low overpotential

Sukeri, Anandhakumar; Bertotti, Mauro

doi:10.1016/j.jelechem.2017.10.004

Cited by 39 publications

(29 citation statements)

References 50 publications

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Section: Overview Of Nanoparticle As Electrocatalystsmentioning

confidence: 99%

“…In particular, it was attained a low detection limit (3 µM), for the amperometric detection of H 2 O 2 , at the surface of dendritic nanoporous gold [93] material, using a low electrode potential value of −0.1 V vs. Ag/AgCl. Also, other literature results have been reported to employ other metallic nanostructured materials such as silver, palladium, ruthenium, rhodium, iridium, and osmium, leading to the attainment of quite low detection limits [94][95][96][97].…”

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confidence: 99%

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Biomolecules and Electrochemical Tools in Chronic Non-Communicable Disease Surveillance: A Systematic Review

et al. 2020

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Over recent three decades, the electrochemical techniques have become widely used in biological identification and detection, because it presents optimum features for efficient and sensitive molecular detection of organic compounds, being able to trace quantities with a minimum of reagents and sample manipulation. Given these special features, electrochemical techniques are regularly exploited in disease diagnosis and monitoring. Specifically, amperometric electrochemical analysis has proven to be quite suitable for the detection of physiological biomarkers in monitoring health conditions, as well as toward the control of reactive oxygen species released in the course of oxidative burst during inflammatory events. Besides, electrochemical detection techniques involve a simple and swift assessment that provides a low detection-limit for most of the molecules enclosed biological fluids and related to non-transmittable morbidities.

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Section: Overview Of Nanoparticle As Electrocatalystsmentioning

confidence: 99%

mentioning

confidence: 99%

Biomolecules and Electrochemical Tools in Chronic Non-Communicable Disease Surveillance: A Systematic Review

et al. 2020

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“…This work further confirmed the large surface area of the porous structure and the rough electrode surface can greatly enhance the electrocatalytic activity. [ 61 ]…”

Section: Nonenzymatic Biosensorsmentioning

confidence: 99%

“…This work further confirmed the large surface area of the porous structure and the rough electrode surface can greatly enhance the electrocatalytic activity. [61] The porous PdRu bimetallic alloy nanoparticles, and porous platinum-replaced copper framework were also reported to act as the nonenzymatic biosensor to perform the oxidation of 1,3,5-trimethylbenzene (TMB) and amperometric detection of glucose. Although they showed remarkable enhanced performance toward natural enzyme, the cytotoxicity of the materials and the detection in living cells were not mentioned.…”

Section: Mesoporous Noble Metal Basedmentioning

confidence: 99%

Mesoporous Materials–Based Electrochemical Biosensors from Enzymatic to Nonenzymatic

Yang

Qiu

Yang

et al. 2019

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Mesoporous materials have drawn more and more attention in the field of biosensors due to their high surface areas, large pore volumes, tunable pore sizes, as well as abundant frameworks. In this review, the progress on mesoporous materials–based biosensors from enzymatic to nonenzymatic are highlighted. First, recent advances on the application of mesoporous materials as supports to stabilize enzymes in enzymatic biosensing technology are summarized. Special emphasis is placed on the effect of pore size, pore structure, and surface functional groups of the support on the immobilization efficiency of enzymes and the biosensing performance. Then, the development of a nonenzymatic strategy that uses the intrinsic property of mesoporous materials (carbon, silica, metals, and composites) to mimic the behavior of enzymes for electrochemical sensing of some biomolecules is discussed. Finally, the challenges and perspective on the future development of biosensors based on mesoporous materials are proposed.

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“…These include thin Au films or Au nanoparticles on substrates such as glass or inert electrodes, faceted and nanostructured Au wires, nanoporous Au, e.g. obtained by dealloying of AgAu alloys and electrochemically treated Au samples [20][21][22][23][24][25][26][27]. In comparison, electrochemical faceting and nanostructuring of bulk wires afford clean and simple alternatives to substratebased metal nanostructures prepared by first synthesizing colloidal nanostructures and then dispersing them onto the substrate surface.…”

Section: Introductionmentioning

confidence: 99%

An affordable option to Au single crystals through cathodic corrosion of a wire: Fabrication, electrochemical behavior, and applications in electrocatalysis and spectroscopy

Elnagar

Hermann

Jacob

et al. 2021

Electrochimica Acta

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Faceting and nanostructuring of polycrystalline gold electrodes by cathodic corrosion in concentrated potassium hydroxide electrolytes has been systematically studied at different electrode potentials. Current-potential curves for the restructured Au electrodes in 0.1 M H2SO4 show characteristic features of Au(111) facets in the double-layer and oxidation region.Thus, the modified Au electrodes adopt properties typically known for well-defined single crystal surfaces. Besides the preferential surface faceting, the electrochemically active surface area (EASA) is enhanced as a function of potential, concentration and time. Scanning electron micrographs show the formation of well-defined triangular pits and nanostructures with a specific orientation confirming the formation of (111)-facets. In this way, the behavior of single crystals is accompanied with the properties of nanoparticles which are of utmost interest in electrocatalysis and surface enhanced Raman spectroscopy (SERS). The electrocatalytic activity of the newly formed "Au(111)" surface from an Au wire has been tested towards the hydrogen evolution reaction (HER) and for the formic acid oxidation reaction (FAOR). The study of electrocatalytic reactions at these nanostructured electrodes allows to identify active centers, which are absent for extended single crystal surfaces.Adsorbed pyridine on the nanostructured Au electrodes directly shows SERS activity, while untreated polycrystalline Au is SERS-inactive. The use of cathodic corrosion of simple wires is a paradigm of SERS-applications in electrochemistry with clean Au electrodes that provide properties of Au(111) single crystals.

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Electrodeposited honeycomb-like dendritic porous gold surface: An efficient platform for enzyme-free hydrogen peroxide sensor at low overpotential

Cited by 39 publications

References 50 publications

Biomolecules and Electrochemical Tools in Chronic Non-Communicable Disease Surveillance: A Systematic Review

Biomolecules and Electrochemical Tools in Chronic Non-Communicable Disease Surveillance: A Systematic Review

Mesoporous Materials–Based Electrochemical Biosensors from Enzymatic to Nonenzymatic

An affordable option to Au single crystals through cathodic corrosion of a wire: Fabrication, electrochemical behavior, and applications in electrocatalysis and spectroscopy

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