Electrochemical impedance spectroscopy of polycrystalline boron doped diamond layers with hydrogen and oxygen terminated surface

Živcová, Z. Vlčková; Petrák, Václav; Frank, Otakar; Kavan, Ladislav

doi:10.1016/j.diamond.2015.03.002

Cited by 29 publications

(24 citation statements)

References 45 publications

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“…Our finding of a wider solvent window for H‐BDD, compared with O‐BDD, contrasts with previous literature on macroscopic electrodes where the opposite has been seen . The O‐BDD electrodes in the literature studies were O‐terminated using an oxygen plasma treatment (whereas we use a strong acid clean) and measurements were made in either acidic sulfate solutions or PBS buffer solutions . Sulfate can be oxidized to S 2 O 8 2− , but only at very high anodic potentials on BDD electrodes .…”

Section: Resultscontrasting

confidence: 79%

“…To explore the impact of surface termination on the solvent window of BDD, the O‐BDD electrode was H‐terminated using a hydrogen plasma treatment, resulting in a water contact angle of 86° (SI, Section S2). Voltammetric SECCM scanning at the H‐BDD electrode was carried out in a region containing the same facets as area I (Figure b), 24

\times

40 μm, marked as I′ in the FE‐SEM image in Figure a.…”

Section: Resultsmentioning

confidence: 99%

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Facet‐Resolved Electrochemistry of Polycrystalline Boron‐Doped Diamond Electrodes: Microscopic Factors Determining the Solvent Window in Aqueous Potassium Chloride Solutions

et al. 2018

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A systematic examination of the microscopic factors affecting the aqueous solvent (electrolyte) window of polycrystalline (p) boron-doped diamond (BDD) electrodes in chloride-containing salt solutions is undertaken by using scanning electrochemical cell microscopy (SECCM) in conjunction with electron backscatter diffraction (EBSD) and Raman microscopy. A major focus is to determine the effect of the local boron doping level, within the same orientation grains, on the solvent window response. EBSD is used to select the predominant (110) orientated areas of the surface with different boron-doped facets, thereby eliminating crystallographic effects from the electrochemical response. Voltammetric SECCM is employed, whereby a cyclic voltammogram is recorded at each pixel mapped by the meniscus-contact SECCM cell. The data obtained can be played as an electrochemical movie of potential-resolved current maps of the surface to reveal spatial variations of electroactivity, over a wide potential range, including the solvent (electrolyte) window.

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Section: Resultscontrasting

confidence: 79%

\times

40 μm, marked as I′ in the FE‐SEM image in Figure a.…”

Section: Resultsmentioning

confidence: 99%

Facet‐Resolved Electrochemistry of Polycrystalline Boron‐Doped Diamond Electrodes: Microscopic Factors Determining the Solvent Window in Aqueous Potassium Chloride Solutions

et al. 2018

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“…In practice, this theory is often used for any semiconductor electrodes; with many and diverse corrections yielding complicated equivalent circuits introduced to eliminate the apparent frequencydependence of the Mott-Schottky lines. A rare exception is a recent characterization of the boron-doped diamond (BDD) samples [12] in neutral aqueous solution: In case of boron-doped diamond with low doping (<=2000 ppm) and hydrogen-terminated surface, within the water stability range the interfacial impedance was found to be a CPE of almost-unity exponent (>0.95) and the Mott-Schottky plot exhibited a fairly broad (approx 0.4 V) potential range of linearity. Acceptor concentration obtained from the slope of the MottSchottky plot was in order-of-magnitude agreement with the values obtained from neutron depth profiling and Raman spectroscopy.…”

Section: Semiconductor/aqueous Solution Interfacesmentioning

confidence: 99%

Electrochemical impedance spectroscopy in interfacial studies

Pajkossy

Jurczakowski

2017

Current Opinion in Electrochemistry

140

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An important role of the electrochemical impedance spectroscopy (EIS) is the characterization of the electrical double layer formed at the electrode/electrolyte interfaces. The phenomenological double layer studies with an aqueous and ionic liquid electrolytes are reviewed with a conclusion that the double layer capacitance is frequency dependent as the rule rather than the exception. We discuss the impedance consequences of the nonuniform current distribution along the electrochemical interface, which also contributes to the apparent frequency dependence of the capacitance. Finally we show recent articles on nonconventional EIS techniques with high lateral resolution or enabling fast measurements.

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“…Very often, EIS is combined with different nanostructured interfaces in order to increase the amount of biorecognition elements on the surface, and, hence, to enhance the performance of the biosensor in terms of assay sensitivity and extension of linear range. Functionalized carbon nanomaterials (or even modified screen‐printed electrodes, SPE), such as graphene or boron‐doped diamond, are currently commonly used and commercially available for the immobilization of biomolecules . There exists, however, the prerequisite that the stability of the SPE reference electrode is crucial for the robustness of disposable impedimetric biosensors.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Impedance Spectroscopy Based Biosensors: Mechanistic Principles, Analytical Examples and Challenges towards Commercialization for Assays of Protein Cancer Biomarkers

et al. 2018

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affinity biosensors are, without any doubt, among the most sensitive analytical devices available, offering low limits of detection and wide linear response ranges. There are, however, only a few papers detailing the application of impedimetric biosensors for the analysis of clinically relevant samples with due clinical performance. The fact that these devices have not found their way to any commercial or clinical use to date might be surprising, since an electrochemical assay platform based on portable potentiostats is a success story for monitoring a range of clinical parameters such as ions, haematological indicators and glucose. This review discusses the reasons behind this discrepancy and addresses the barriers to be overcome in order to achieve the point-of-care diagnostics using such devices for detection of protein oncomarkers approved by FDA. The final part of the review covers the most recent progress in the area.[a] Dr.

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Electrochemical impedance spectroscopy of polycrystalline boron doped diamond layers with hydrogen and oxygen terminated surface

Cited by 29 publications

References 45 publications

Facet‐Resolved Electrochemistry of Polycrystalline Boron‐Doped Diamond Electrodes: Microscopic Factors Determining the Solvent Window in Aqueous Potassium Chloride Solutions

Facet‐Resolved Electrochemistry of Polycrystalline Boron‐Doped Diamond Electrodes: Microscopic Factors Determining the Solvent Window in Aqueous Potassium Chloride Solutions

Electrochemical impedance spectroscopy in interfacial studies

Electrochemical Impedance Spectroscopy Based Biosensors: Mechanistic Principles, Analytical Examples and Challenges towards Commercialization for Assays of Protein Cancer Biomarkers

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