Article
Chemistry, Analytical
Vincent Ball
Summary: This study compares the influence of different electrodeposition methods on the electrochemical properties of films made from pyrogallol or pyrocatechol on amorphous carbon electrodes. It was found that chronoamperometry is more efficient for pyrocatechol-based films, while fewer cyclic voltammetry cycles are needed for pyrogallol-based films to become impermeable to hexacyanoferrate anions.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Amine Kherfi, Ahmed Madani, Djazia Chalal, Sofiane Benidir
Summary: This study reports on the use of SHMP surfactant to disperse ZnO nanoparticles in the PPy polymer matrix for the production of a composite PPy-ZnO coating, which exhibited higher corrosion resistance and better barrier properties compared to pure PPy and PPy-ZnO coatings.
Article
Materials Science, Multidisciplinary
Rizwan Wahab, Manawwer Alam
Summary: This study utilized aluminum oxide quantum dots (γ-Al2O3QDs) for concentration-based analysis of hydrogen peroxide (H2O2). The γ-Al2O3 was synthesized through a hydrothermal solution process and characterized in detail. The γ-Al2O3 QDs were employed for the detection of H2O2 and their sensing efficiency was evaluated with a three-electrode system.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Physical
Gibson P. Scisco, Mark E. Orazem, Kirk J. Ziegler, Kevin S. Jones
Summary: The capacitances of electrochemical systems determined from cyclic voltammetry (CV) are affected by the constant-phase element (CPE) behavior, which can be illustrated by simulated circuits. The capacitance extracted from CV follows a power law relationship with sweep rate, and a critical sweep rate can be defined by comparing CV-obtained capacitance with that from electrochemical impedance spectroscopy (EIS) data, allowing for an effective time constant formulation for the circuits. Sweep rates at least two orders of magnitude below the critical rate should be used in CV to mitigate the influence of the system's time constant on the measured capacitance. Reporting CPE parameters R, Q, and alpha is recommended for more accurate comparisons of supercapacitors rather than capacitance vs. sweep rate data from CV measurements.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Muhammad Shafa, Iqbal Ahmad, Shahid Hussain, Muhammad Asif, Yi Pan, Rustem Zairov, Asma A. Alothman, Mohamed Ouladsmane, Zahid Ullah, Nabi Ullah, Chen Lai, Uzma Jabeen
Summary: A nanoalloy-based electrochemical sensor for H2O2 detection has been fabricated using chemical reduction methodology. The prepared samples were characterized by X-ray diffraction and scanning electron microscopy. Among all the compositions, Ag-Cu (9:1) nanoalloys showed the best performance in detecting H2O2.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Analytical
Fikret Ari, Bahar Ince, Mehmet Altay Unal, Mustafa Kemal Sezginturk, Sibel A. Ozkan
Summary: Although there is still room for improvement in diagnostic and treatment options for various cancers, electrochemical biosensors using quartz tuning forks (QTF) have emerged as a promising platform. This research explores the functionalization and isolation of QTF for biomarker determination, demonstrating their unique response and sensitivity. The results show that QTF-based immunosensors have high detection sensitivity and low cost, making them ideal for point-of-care diagnostic devices.
MICROCHEMICAL JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Stefan-Marian Iordache, Eusebiu Ilarian Ionete, Ana-Maria Iordache, Ioan Stamatin, Nicolae Catalin Zoita, Arcadie Sobetkii, Cristiana Eugenia Ana Grigorescu
Summary: A sensitive material based on a palladium-functionalized CNT composite was proposed to evaluate deuterium concentration in aqueous samples. Cyclic voltammetry and impedance spectroscopy studies confirmed the sensing behavior of the material, showing quasi-reversible process with low desorption tendency for hydrogen atoms.
Article
Materials Science, Coatings & Films
Fan Yang, Debin Wang, Tianrun Li, Baijun Yang, Suode Zhang, Jianqiang Wang
Summary: The impact-corrosion behavior of monolayer and hierarchical Fe-based amorphous coatings fabricated by HVAF was investigated in 3.5 wt% NaCl solution. The monolayer coating exhibits corrosion failure with increased impact energy, while the hierarchical coating shows improved resistance. However, at high impact energies, both coatings experience corrosion degradation.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Energy & Fuels
A. F. Romero, R. Tomey, P. Ocon, J. Valenciano, H. Fricke
Summary: The study investigates the effect of incorporating boric acid into lead-acid batteries to enhance their performance. It was found that adding 0.50 wt% boric acid reduces the oxide reduction charge by 23% and increases the resistance of the corrosion process. Adding boric acid before cell formation improves the Cold Cranking Ampere (CCA) performance by 26%, while adding it after formation significantly reduces the Oxygen Evolution Reaction (OER) rate by 75% on the positive plate. Both addition methods slow down the corrosion growth in the positive plate, with reductions of 20% (addition before formation) and 12% (addition after formation).
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Multidisciplinary
Mahwash Mahar Gul, Khuram Shahzad Ahmad, Andrew Guy Thomas, Daoud Ali
Summary: A transparent conductive electrode using Erbium sulphide and Indium sulphide composite was synthesized from a single source precursor via spin coating. The composite showed hexagonal structures and had a crystallite size of 56 nm according to X-ray diffraction analysis. X-ray photoelectron spectroscopy detected the core levels of Er 4d, In 3d, and S 2p. The composite exhibited an optical band gap of 4.12 eV. Electrical studies using various techniques in a photo-electrochemical cell demonstrated the superior performance of the electrode. The study presented an effective photoelectrode for renewable energy systems.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Physical
Vikas Kumar Pandey, Sanjeev Verma, Bhawna Verma
Summary: This study investigated the use of waste coconut shells to prepare activated carbon and its application in the fabrication of a ternary hybrid composite. The fabricated electrode exhibited high specific capacitance and excellent cycle stability, which could contribute to the development of new generation energy storage devices.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Polymer Science
Ancuta Dinu, Constantin Apetrei
Summary: This study presents the development of a new enzyme sensor for the quantification of tyrosine in pharmaceuticals. The enzyme sensor showed a low limit of detection and high sensitivity, and was validated using infrared spectrometry on pharmaceuticals from different manufacturers.
Article
Chemistry, Analytical
Karen Y. P. S. Avelino, Alberto G. Silva-Junior, Maira G. R. Pitta, Abdelhamid Errachid, Maria D. L. Oliveira, Cesar A. S. Andrade
Summary: Systemic sclerosis (SSc) is an autoimmune disease that affects connective tissue. A nano-engineered immunosensor surface was developed for detecting the oncostatin M receptor (sOSMR) protein in clinical samples. The biosensor showed a differential diagnostic character for limited cutaneous (lSSc) and diffuse cutaneous (dSSc) SSc subtypes. The sensing strategy demonstrated high sensitivity and potential for SSc-related biomarker research.
Article
Chemistry, Physical
Anbazhagan Murugan, Vadivel Siva, Abdul Samad Shameem, Sultan Asath Bahadur
Summary: Nano-crystalline quaternary Cu2ZnSnS4 (CZTS) thin films were deposited on conducting and nonconducting substrates using the SILAR method with varying dipping times. The films were characterized structurally, vibrationally, optically, morphologically, compositionally, and electrochemically. The films exhibited a mingled phase of wurtzite and kesterite structures, with good optical absorption and a wide range of bandgap values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Chawki Awada, Hassan H. Hammud, Hawra A. Bukhamsin, Dolayl E. Al-Hudairi, Francesco Ruffino
Summary: In this study, a new electro-chemical sensor based on functionalized gold/graphene/Cu layers was developed for highly sensitive detection of glucose. The sensor showed increased sensitivity compared to standard sensors, as confirmed by surface enhanced Raman scattering and cyclic voltammetry measurements. The presence of 4-NTP molecules on the sensor surface improved its sensitivity for glucose detection. The sensor exhibited a dynamic range of 2.0-19.6 mM to 2.0-29.1 mM and a lower detection limit of 0.5 mM for glucose.
APPLIED SURFACE SCIENCE
(2023)
