Poly(methylene blue)-ternary deep eutectic solvent/Au nanoparticle modified electrodes as novel electrochemical sensors: Optimization, characterization and application

Abad-Gil, Lucía; Brett, Christopher M.A.

doi:10.1016/j.electacta.2022.141295

Cited by 24 publications

(9 citation statements)

References 52 publications

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“…The increment in oxidation current with the increased concentration of BPA further confirms the electro-oxidation of BPA to quinone, which can be observed along a positive shift in anodic current and a negative shift in cathodic current, respectively. This shift in peak could be attributed to (i) the strong interaction of BPA at the surface of the electrode and (ii) at a high concentration, the diffusion process is disrupted, and to re-establish the mass transportation, the electrochemical system applies more potential, thus resulting in a shift of the peak potential . Additionally, an insignificant redox peak appears in the absence of BPA, which could be attributed to formation of electroactive species (NiOOH/CuOOH) in alkaline media and in accordance with the reported literature .…”

Section: Resultssupporting

confidence: 87%

Fabrication of CuO–NiO Wrapped Cellulose Acetate/Polyaniline Electrospun Nanofibers for Sensitive Monitoring of Bisphenol-A

Shoukat

Anzar

Asad

et al. 2023

ACS Sustainable Chem. Eng.

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Monitoring endocrine-disrupting chemicals such as bisphenol-A (BPA) is of great concern because its exposure may lead to reproductive problems, neurotoxicity, mutagenicity, and even carcinogenicity. Herein, we reported the fabrication of an efficient electrochemical sensor based on CuO–NiO wrapped cellulose acetate/polyaniline electrospun nanofibers at a Ni foam (CuO–NiO/CA–PANI@NF) electrode for the sensitive and selective monitoring of BPA. CA–PANI-based electrospun nanofibers were selected because of their improved electrical conductivity and charge density, high binding affinity toward BPA via alternative amine and imine groups, and low cost, thus paving the way for the smooth and uniform flow of ions. However, CuO–NiO-based nanoparticles offer more exposed catalytic active species such as NiOOH/CuOOH for the fast electrocatalytic oxidation of BPA. Thus, the synergistic effect of CuO–NiO nanoparticles with electrospun nanofibers leads to high sensitivity (0.00172 μA/nM/cm2) with a low limit of detection (0.6 nM), a wide linear range (2–100 nM), and high selectivity, even in the presence of interferences, including Co2+, Cd2+, Na+ Pb2+, Ni2+, Cd2+, Ca2+, Fe3+, NO3 2–, SO4 2–, Cr6+, Br–, Mg2+, Zn2+, and Ba2+ and molecules such as bisphenol-B, bisphenol-F, and phenol. The designed electrode was successfully applied to monitor BPA from plastic bottled water with high precision, thus suggesting the reliability of our designed system.

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Section: Resultssupporting

confidence: 87%

Fabrication of CuO–NiO Wrapped Cellulose Acetate/Polyaniline Electrospun Nanofibers for Sensitive Monitoring of Bisphenol-A

Shoukat

Anzar

Asad

et al. 2023

ACS Sustainable Chem. Eng.

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“…The peaks at 83.3 eV and 87.01 eV peaks in Figure 3(b) correspond to Au 4f 7 / 2 and Au 4f 5 / 2 of the ENIG finish gold PCB electrode [47]. Figure 3(c) shows a peak for N 1s, with deconvoluted peaks at 396.4 eV, 399.3 eV, 401.28 eV that correspond to C−N/ −C−NH, −C=N− and −NH respectively [27, 48]. The peak for O 1s shown in Figure 3(d) with deconvoluted peaks at 530.89 eV for Me−OX(metal-oxide), 531.7 eV for O=C, and 533.35 eV for O−C [49].…”

Section: Resultsmentioning

confidence: 99%

“…The peak for O 1s shown in Figure 3(d) with deconvoluted peaks at 530.89 eV for Me−OX(metal-oxide), 531.7 eV for O=C, and 533.35 eV for O−C [49]. Figure 3(e) shows peak for C 1s and deconvoluted peaks at 284.43 eV for C−C/C−H, 285.5 eV for C−OH/C−N and 287.5 eV for C=O [27, 49, 50]. These peaks confirm the absorption of MB on the PCB electrode and the sulfur peak was not observed in the XPS spectra.…”

Section: Resultsmentioning

confidence: 99%

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Electrochemical detection of myeloperoxidase (MPO) in blood plasma with surface-modified electroless nickel immersion gold (ENIG) printed circuit board (PCB) electrodes

Nandeshwar,

Tallur

2023

Preprint

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Printed circuit board (PCB) based biosensors have often utilized hard gold electroplating, that nullifies the cost advantages of this technology as compared to screen printed electrodes. Electroless nickel immersion gold (ENIG) is a popular gold deposition process widely used in PCB manufacturing, but vulnerable to pinhole defects and large surface roughness, which compromises biosensor performance. In this work, we present a method to address these challenges through electrodeposition of methylene blue (MB) to cover surface defects and improve electroactivity of ENIG PCB electrodes. We also demonstrate a process to realize in situ synthesis of gold nanoparticles (AuNPs) using acid-functionalized multi-walled carbon nanotubes (MWCNTs) as scaffold, that are used to immobilize antibody for the target molecule (myeloperoxidase: MPO, early warning biomarker for cardiovascular diseases) through a modified cysteamine/gluteraldehyde based process. The processing steps on the electrode surface are developed in a manner that do not compromise the integrity of the electrode, resulting in repeatable and reliable performance of the sensors. Further, we demonstrate a cost-effective microfluidic packaging process to integrate a capillary pump driven microfluidic channel on the PCB electrode for seamless introduction of samples for testing. We demonstrate the ability of the sensor to distinguish clinically abnormal concentrations of MPO from normal concentrations through extensive characterization using spiked serum and blood plasma samples, with a limit of detection of 0.202 ng/mL.

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“…Other work has reported the use of a GCE composite composed of the electroactive redox polymer formed in a ternary deep eutectic solvents using gold nanoparticles or with carbon nanotubes . In the former case, they performed the simultaneous sensing of ascorbic acid and 5-ASA while in the latter, simultaneously acetaminophen and 5-ASA, both approaches showing low detection limits which are successful for determining 5-ASA within pharmaceuticals.…”

Section: Glassy Carbon Electrodes (Gce)mentioning

confidence: 99%

Electroanalytical Overview: The Sensing of Mesalamine (5-Aminosalicylic Acid)

Crapnell,

Adarakatti,

Banks

2023

ACS Meas. Sci. Au

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Mesalamine, known as 5-aminosalicylic acid, is a medication used primarily in the treatment of inflammatory bowel disease, including ulcerative colitis and Crohn's disease. 5-Aminosalicylic acid can be measured using various benchtop laboratory techniques which involve liquid chromatography−mass spectroscopy, but these are sophisticated and large, meaning that they cannot be used on-site because transportation of the samples, chemicals, and physical and biological reactions can potentially occur, which can affect the sample's composition and potentially result in inaccurate results. An alternative approach is the use of electrochemical based sensing platforms which has the advantages of portability, cost-efficiency, facile miniaturization, and rapid analysis while nonetheless providing sensitivity and selectivity. We provide an overview of the use of the electroanalytical techniques for the sensing of 5-aminosalicylic acid and compare them to other laboratory-based measurements. The applications, challenges faced, and future opportunities for electroanalytical based sensing platforms are presented in this review.

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Poly(methylene blue)-ternary deep eutectic solvent/Au nanoparticle modified electrodes as novel electrochemical sensors: Optimization, characterization and application

Cited by 24 publications

References 52 publications

Fabrication of CuO–NiO Wrapped Cellulose Acetate/Polyaniline Electrospun Nanofibers for Sensitive Monitoring of Bisphenol-A

Fabrication of CuO–NiO Wrapped Cellulose Acetate/Polyaniline Electrospun Nanofibers for Sensitive Monitoring of Bisphenol-A

Electrochemical detection of myeloperoxidase (MPO) in blood plasma with surface-modified electroless nickel immersion gold (ENIG) printed circuit board (PCB) electrodes

Electroanalytical Overview: The Sensing of Mesalamine (5-Aminosalicylic Acid)

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