Influence of the atomic nitrogen content in amorphous carbon nitride thin films on the modulation of their polarizable interfaces properties

Billon, Florence; Haghiri‐Gosnet, A. M.; Tribollet, Bernard; Deslouis, C.; Pailleret, Alain; Gamby, Jean

doi:10.1016/j.electacta.2018.05.116

Cited by 19 publications

(13 citation statements)

References 50 publications

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“…Due to this method, only a well-defined area (0.282 cm²) of the WE electrode was in contact with the electrolyte. The a-CNx thin film stoichiometry and thickness were determined with the help of XPS and SEM-FEG techniques respectively and led to a-CN 0.26 as formula and a 320 nm thickness, respectively [47].…”

Section: Glass/ito/ Cnx Electrode Fabricationmentioning

confidence: 99%

“…More recently, a further study of spectroscopic, microscopic and electrochemical characterization of several ITO/a-CNx electrodes was carried out both in air and in blocking electrode conditions, i.e. in the presence of the supporting electrolyte only [47].…”

Section: Introductionmentioning

confidence: 99%

“…In this applicative work, a-CN 0.26 thin films were synthesized on ITO substrates for electrodes elaboration according to the protocol described in [47]. Then, a soft electrochemical pretreatment was developed to activate these electrodes instead of hard pre-treatment which could provoke delamination.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of electrochemical detection of transthyretin synthetic peptide and its amino acids on carbon electrodes: Glassy carbon versus amorphous carbon nitride a-CNx

Billon

Potier

Haghiri‐Gosnet

et al. 2019

Electrochimica Acta

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et al.. Improvement of electrochemical detection of transthyretin synthetic peptide and its amino acids on carbon electrodes: Glassy carbon versus amorphous carbon nitride a-CNx. Electrochimica Acta, Elsevier, 2019, 296, pp. AbstractAmorphous carbon nitride a-CN 0.26 thin films were elaborated on transparent and conductive glass/indium-tin oxide (ITO) wafers to improve the electroanalytical detection of transthyretin peptide (PN) and specific amino acids (AA) from its sequence, which constitutes a great challenge for the diagnosis of transthyretin-related familial amyloïd polyneuropathy (ATTR). The naphthalene-2,3-dicarboxyaldehyde (NDA) label was used for the derivatization reaction of PN and AAs to form N-2-substituted-1-cyanobenz-[f]-isoindole derivatives (CBI) which are both fluorescent and electroactive. The results obtained on a-CN 0.26 were compared with those observed on glassy carbon (GC) as a reference material. It was shown that a soft anodic pretreatment protocol on glass/ITO/a-CN 0.26 electrode in a KCl aqueous solution drastically improved the performances of the CBI-PN and CBI-AA oxidation peak. The oxidation peak potential for all CBI derivatives varied in the same range than those measured on GC and pretreated glass/ITO/a-CN 0.26 , while no discrimination could be obtained on as-grown glass/ITO/a-CN 0.26 electrodes. For almost all the tested CBI derivatives, peak areas, full-widths at peak midheight, peak current density and their standard deviation (SD) values were improved on a pretreated a-CN 0.26 electrode in comparison with GC.

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Section: Glass/ito/ Cnx Electrode Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improvement of electrochemical detection of transthyretin synthetic peptide and its amino acids on carbon electrodes: Glassy carbon versus amorphous carbon nitride a-CNx

Billon

Potier

Haghiri‐Gosnet

et al. 2019

Electrochimica Acta

Self Cite

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“…In the testing stage, the rates of corrosion from corrosive solutions passing through pores of coating are far less when compared with the corrosion rates of corrosive products during the interface contact of the coating and metal matrix [37]. The equivalent electrical-circuit model is shown in Figure 8b, where R3, C, and CPE are microporous resistance, double-layer capacitance, and constant-phase element, respectively [38,39]. Characterization of anticorrosion performance illustrated that adding TP/GE (0.3 wt.%) could increase the impenetrability trait and corrosion resistance of the coating.…”

Section: Anticorrosive Performancementioning

confidence: 99%

One-Step Method for Preparing Dispersive Tea Polyphenol/Graphene Nanosheets Enhanced with Anticorrosion Performance

et al. 2019

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Water-dispersible and anticorrosion nanocomposites have attracted extensive attention. In this study, tea polyphenol (TP)/graphene (GE) was fabricated with a one-step route. The preparation and modification of graphene nanosheets was carried out by graphene employing tea polyphenols as reduction and functionalization reagents. Our study adopted a nontoxic reductant without an extra functionalization reagent. This method is convenient, inexpensive, and environmentally friendly. The final functionalized graphene nanosheets had a single-layer structure. For evaluating performance, Raman spectroscopy was adapted for evaluating π–π interactions between TP and graphene. Elemental and structural composition was analyzed using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Sample morphology was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results indicated that the TP could effectively augment the dispersive performance of graphene in the solution. The durable anticorrosion capacity of the epoxy matrix noticeably increased after adding the appropriate amount of tea polyphenols–graphene (TPG) (0.3 wt.%). Electrochemical impedance spectroscopy (EIS) studies showed that the impedance of artificial defects was enhanced. The anticorrosion property was attributed to the uniform dispersion of graphene by adding TP.

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“…Recently, a study based on spectroscopic, microscopic and electrochemical characterizations of several ITO/a-CNx (0.12<x<0.30) disk electrodes led us to conclude why a-CN0.30, behaves both as a dielectric material (low electronic conductivity) and as an ideally polarizable interface (high polarization resistance) [31], [32].…”

Section: Introductionmentioning

confidence: 99%

Amorphous carbon nitride microband integrated in a microfluidic device for DNA biosensors applications

Horny

Billon

Deslouis

et al. 2021

Journal of Electroanalytical Chemistry

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This study presents the use of new kind of carbon electrode materials as ultramicroelectrodes (UMEs) in the field of electrochemical DNA biosensors which has already been proven to be effective in protocols to DNA sequences hybridization. In contrast to other carbon materials such as diamond like carbon, that are difficult to integrate in microfluidic devices due to their high temperature deposition, amorphous carbon nitride (a-CNx) is easily synthesized at room temperature on various materials using sputtering techniques. Here, we report a-CNx use as microband electrodes in Glass/PDMS microfluidic devices. a-CNx electrodes were activated and then biofuntionalized by covalent grafting of a DNA probe as self-assembled monolayer (SAM) with a view to future development of a detection platform targeting circulating DNA or RNA sequences in microfluidic channels.

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Influence of the atomic nitrogen content in amorphous carbon nitride thin films on the modulation of their polarizable interfaces properties

Cited by 19 publications

References 50 publications

Improvement of electrochemical detection of transthyretin synthetic peptide and its amino acids on carbon electrodes: Glassy carbon versus amorphous carbon nitride a-CNx

Improvement of electrochemical detection of transthyretin synthetic peptide and its amino acids on carbon electrodes: Glassy carbon versus amorphous carbon nitride a-CNx

One-Step Method for Preparing Dispersive Tea Polyphenol/Graphene Nanosheets Enhanced with Anticorrosion Performance

Amorphous carbon nitride microband integrated in a microfluidic device for DNA biosensors applications

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