Impedimetric sensing of α-amino acids driven by micro-patterned 1,8-Diazafluoren-9-one into titania- boron- doped maze-like nanocarbons

Pierpaoli, Mattia; Lewkowicz, Aneta; Dec, Bartłomiej; Nadolska, Małgorzata; Bogdanowicz, Robert

doi:10.1016/j.snb.2022.132459

Cited by 3 publications

(3 citation statements)

References 45 publications

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“…Impedance spectra can be analyzed by fitting to an equivalent electrical circuit to obtain the values of the electrical components that model each interfacial phenomenon, thus permitting the illumination of the processes of charge transfer and charge separation. 34,35 The Randles equivalent circuit is widely used to simulate EIS data. This circuit incorporates both the resistance of electrolyte solution ( R s ), the double layer capacitance ( C dl ) generated by ions accumulating at electrode surfaces.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and characterization of a nanostructure conductive copolymer based on polyaniline and polylactic acid as an effective substrate in proteins impedimetric biosensing

Dinpanah,

Mansour Lakouraj,

Fooladi

et al. 2024

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

“…There is a linear relationship between DR ct and BSA concentration from 0.1 to 20 mg L −1 and the correlation coefficients are more signicant than 0.98. 20,35,45…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Synthesis and characterization of a nanostructure conductive copolymer based on polyaniline and polylactic acid as an effective substrate in proteins impedimetric biosensing

Dinpanah,

Mansour Lakouraj,

Fooladi

et al. 2024

RSC Adv.

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“…In fact, in alkaline media, GLY functions as a tridentate ligand in the GLY/Cu complex via amine nitrogen, carboxyl, and phosphonate oxygens. , Direct electrochemical detection of GLY on a carbon paste electrode was performed by Oliveira et al who observed a nonreversible oxidation peak at +0.95 V vs Ag/AgCl; similarly, Caceres-Jensen and colleagues observed that a single and broad oxidation peak was obtained on MWCNT/GCE at a potential close to +0.05 V vs SCE (35 mV vs Ag/AgCl 3 M KCl). In our previous work, we demonstrated the exceptional versatility of boron/nitrogen-codoped carbon nanowalls in electrochemical sensing, both for direct detection and as functional substrates for tailoring supramolecular assemblies, also enhancing the electrochemical binding of perfluorooctane sulfonate (PFOS) in molecularly imprinted polymers . Carbon nanowalls, unlike planar carbon allotropes, facilitate fast electron transfer due to their high surface area and dense edge population, which are optimal sites for functional group attachment.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Defects in B, N-Codoped Carbon Nanowalls for Direct Electrochemical Oxidation of Glyphosate and its Metabolites

Pierpaoli,

Jakóbczyk,

Ficek

et al. 2024

ACS Appl. Mater. Interfaces

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Tailoring the defects in graphene and its related carbon allotropes has great potential to exploit their enhanced electrochemical properties for energy applications, environmental remediation, and sensing. Vertical graphene, also known as carbon nanowalls (CNWs), exhibits a large surface area, enhanced charge transfer capability, and high defect density, making it suitable for a wide range of emerging applications. However, precise control and tuning of the defect size, position, and density remain challenging; moreover, due to their characteristic labyrinthine morphology, conventional characterization techniques and widely accepted quality indicators fail or need to be reformulated. This study primarily focuses on examining the impact of boron heterodoping and argon plasma treatment on CNW structures, uncovering complex interplays between specific defect-induced three-dimensional nanostructures and electrochemical performance. Moreover, the study introduces the use of defect-rich CNWs as a label-free electrode for directly oxidizing glyphosate (GLY), a common herbicide, and its metabolites (sarcosine and aminomethylphosphonic acid) for the first time. Crucially, we discovered that the presence of specific boron bonds (BC and BN), coupled with the absence of Lewis-base functional groups such as pyridinic-N, is essential for the oxidation of these analytes. Notably, the D+D* second-order combinational Raman modes at ≈2570 cm −1 emerged as a reliable indicator of the analytes' affinity. Contrary to expectations, the electrochemically active surface area and the presence of oxygen-containing functional groups played a secondary role. Argon-plasma post-treatment was found to adversely affect both the morphology and surface chemistry of CNWs, leading to an increase in sp 3hybridized carbon, the introduction of oxygen, and alterations in the types of nitrogen functional groups. Simulations support that certain defects are functional for GLY rather than AMPA. Sarcosine oxidation is the least affected by defect type.

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Discriminating macromolecular interactions based on an impedimetric fingerprint supported by multivariate data analysis for rapid and label-free Escherichia coli recognition in human urine

Koterwa,

Pierpaoli,

Nejman-Faleńczyk

et al. 2023

Biosensors and Bioelectronics

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Impedimetric sensing of α-amino acids driven by micro-patterned 1,8-Diazafluoren-9-one into titania- boron- doped maze-like nanocarbons

Cited by 3 publications

References 45 publications

Synthesis and characterization of a nanostructure conductive copolymer based on polyaniline and polylactic acid as an effective substrate in proteins impedimetric biosensing

Synthesis and characterization of a nanostructure conductive copolymer based on polyaniline and polylactic acid as an effective substrate in proteins impedimetric biosensing

Tailoring Defects in B, N-Codoped Carbon Nanowalls for Direct Electrochemical Oxidation of Glyphosate and its Metabolites

Discriminating macromolecular interactions based on an impedimetric fingerprint supported by multivariate data analysis for rapid and label-free Escherichia coli recognition in human urine

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