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capacitance; electrochemical capacitors; electrodes; energy; energy density
Abstract:
... Layered 2D/2D heterointerface composites experience interesting properties that greatly stimulate the recent surge in the attention as robust supercapacitor electrode materials, especially the MXene-based 2D/2D heterointerface for its robust energy storage compatibility. This report unveils a synergistically in situ prepared 2D/2D Nb₂C/Ti₃C₂ MXene (NCTC) heterointerface nanoarchitecture by facile ...
calibration; capillary zone electrophoresis; electrodes; electrolytes; fluorescein; fluorescence
Abstract:
... Commercial systems for capillary electrophoresis are designed for the unattended analysis of several samples, and are usually large, complex, and expensive. We report a compact system for manual injection of a single sample in capillary electrophoresis, which is ideal for method development and for student training. The injector consists of two parts that are manufactured by three-dimensional prin ...
... Ti₃C₂Tₓ, a member of the MXene, has attracted extensive interest because of its high conductivity, unique two-dimensional (2D) structure and intrinsic pseudocapacitance for supercapacitors. Flexible and freestanding Ti₃C₂Tₓ films are promising electrodes for functioned supercapacitors used in wearable and portable electronic devices. However, the severe self-restacking of 2D Ti₃C₂Tₓ nanosheets res ...
capacitance; electrochemical capacitors; electrochemistry; electrodes; electrolytes; electron transfer; energy density; foams
Abstract:
... Improving the electron transfer kinetics and optimizing the electrode morphology for efficient electrolyte diffusion are effective strategies for achieving high-performance asymmetric supercapacitors (ASCs). Herein, we construct a novel ZIF-67-derived 3D hierarchical core–shell spiny globe with flat leaves-shaped heterostructure (Co₂P@Ni₂P/NiCo₂O₄@CoO–NF, CNNCC–NF) with improved electron conductiv ...
... Interconnected porous carbons show great potential for high-rate capacitive energy storage, especially at high electrode mass loadings, due to their continuous conductive network and ion migration channels. Herein, we show a simple construction of 3D interconnected porous carbon through spontaneous merging of nano-sized ZIF-8 polyhedrons (ca. 76 nm) during the pyrolysis process. The obtained porou ...
... Designing an earth-abundant electrode material with high activity and durability is a major challenge for water splitting to produce clean and green hydrogen energy. In this study, we report a novel high-performance electrocatalyst derived from a unique three-dimensional hierarchical network of two-dimensional iron-doped nickel selenide nanosheets (2D Fe-doped NiSe NSs) and high-quality carbon nan ...
... This study demonstrates a novel multi-functional microfluidic system, designated three dimensional Alternative Current Electrokinetic/Surface Enhanced Raman Scattering (3D-ACEK/SERS), which can concentrate bacteria from whole blood, identify bacterial species, and determine antibiotic susceptibilities of the bacteria rapidly. The system consists of a hybrid electrokinetic mechanism, integrating AC ...
... In this work, we have demonstrated a novel bird nest-like nanostructured NiCo₂O₄ (BNNS-NiCo₂O₄) synthesis for the first time by implementing the facile hydrothermal approach and specified via various analytical methods. Particularly, XRD technique presented the data on the crystal structure of BNNS-NiCo₂O₄. Moreover, the bird nest type three-dimensional (3D) hierarchical structure was evident via ...
... We assessed a possibility of using octadecylamine (ODA) as an ionophore component of the membrane of a cadmium-selective electrode (Cd-SE). The equilibria in the membrane–solution system were studied depending on the acidity of the medium and the amount of the ionophore in order to reveal the mechanism of membrane functioning. At pH 1–2, octadecylamine is in the cationic form, and cadmium ions in ...
... In this work, a CdSe@CdS quantum dots (QDs) based label-free electrochemiluminescence (ECL) aptasensor was developed for the specific and sensitive detection of ochratoxin A (OTA). Chitosan (CHI) could immobilize abundant QDs on the surface of an Au electrode as the luminescent nanomaterials. Glutaraldehyde was used as the crosslinking agent for coupling a large number of OTA aptamers. Thanks to t ...
... Carmoisine (CMS) as a synthetic azo dye is extensively utilized in the pharmaceutical, cosmetics, textile, and food industries. Previous studies revealed that several serious health problems are caused by longer exposure to CMS. Thus, in most countries, the permissible quantity of CMS in pharmaceutical and food products is controlled strictly by legislation. Hence, it is essential to develop a sen ...
... Research efforts have recently been directed at developing electrically conductive membranes (EMs) for pressure-driven membrane separation processes to remove effectively the highly toxic pollutants from water. EMs serve as both the filter and the electrode during filtration. With the assistance of a power supply, EMs can considerably improve the toxic pollutant removal efficiency and even realize ...
... A carbon film functionalized with reduced graphene oxide (rGO) and Cu nanoparticles (NPs)-tipped carbon nanofibers (CNFs) was demonstrated to be a versatile electrode for the efficient electropolymerization of the following monomers: acryl amide, methylene blue, methyl orange, and β-cyclodextrin. These electropolymers were used as the recognition elements for the measurements of glucose, creatinin ...
... C₆₀-based molecular solids have shown promise as important constituents in electrode materials as well as for providing interfacial stability for solid state electrolytes in alkali ion batteries. At room temperature, the solid state C₆₀ crystal is characterized by a face-centered cubic (FCC) structure, with large interstitial voids, which can accommodate and promote ion transport. In this regard, ...
... Efficient and timely testing has taken center stage in the management, control, and monitoring of the current COVID-19 pandemic. Simple, rapid, cost-effective diagnostics are needed that can complement current polymerase chain reaction-based methods and lateral flow immunoassays. Here, we report the development of an electrochemical sensing platform based on single-walled carbon nanotube screen-pr ...
... In this paper, an electrochemical biosensor was established for the high-sensitivity detection of Tenuazonic acid (TeA) in fruits based on the enrichment of flower-shaped nano-ZnO and the specific recognition of immune response. Herein flower-shaped nano-ZnO (ZnO NFs) with a hexagonal wurtzite structure and diameter of 700–800 nm were demonstrated to have the optimal specific surface area and outs ...
electric generators; electrodes; foams; hydrophobicity; light intensity; polytetrafluoroethylene; silicon; solar radiation
Abstract:
... The photothermal Marangoni effect enables direct light-to-work conversion, which is significant for realizing the self-propulsion of objects in a noncontact, controllable, and continuous manner. Many promising applications have been demonstrated in micro- and nanomachines, light-driven actuators, cargo transport, and gear transmission. Currently, the related studies about photothermal Marangoni ef ...
... We explored a low-cost wireless smart portable sensor based on a disposable laser-induced porous graphene (LIPG) flexible substrate electrode decorated by gold nanoshells (AuNSs) for a simple and rapid electrochemical detection of sulfonamides (SAs). The LIPG was prepared by the one-step computer-controlled laser direct-writing patterning techniques on polyimide (PI) substrate, and the AuNSs were ...
ambient temperature; artificial intelligence; carbon; catalytic activity; corrosion; crosslinking; electric generators; electric potential difference; electrodes; friction; hydrogen; industry; oils; polyurethanes; renewable energy sources; silicone
Abstract:
... With the increasing demand for carbon neutrality, the development of renewable and recycle green energy has attracted wide attention from researchers. A novel self-healing triboelectric nanogenerator (TENG) was constructed by applying a linear silicone-modified polyurethane (PU) coating as a triboelectric layer, which was obtained by reacting hydroxypropyl silicone oil and hexamethylene diisocyana ...
... Shigella dysenteriae, a gram-negative bacterium, which results in the most infectious of bacterial shigellosis and dysenteries. In this study, an innovative gene detection platform based on label-free DNA sequences was developed to detect Shigella dysenteriae in human plasma samples. The porous and honeycomb-like structure of biochar (BC) was first synthesized through a pyrolysis process. Then, th ...
central nervous system; electrodes; electromyography; horses; mastication; motor neurons; muscles; skeletal muscle
Abstract:
... Superficial skeletal muscle activation is associated with an electric activity. Bidimensional High-Density Surface Electromyography (HD-sEMG) is a non-invasive technique that uses a grid of equally spaced electrodes applied on the skin surface to detect and portray superficial skeletal muscle activation. The goal of the study was to evaluate the feasibility of HD-sEMG to detect electrical activati ...
... A molecularly imprinted sensor for highly sensitive and selective determination of dibutyl phthalate (DBP) was fabricated by combining multi-walled carbon nanotubes (MWCNTs) and Au nanoparticles (AuNPs) with surface molecularly imprinted polymer (SMIPs). The MWCNTs and AuNPs were designed to modify the electrode surface to accelerate the electron transfer rate and enhance the chemical stability. S ...
... The electrochemical CO₂ reduction reaction (CO₂RR) using renewably generated electricity under mild conditions is a promising and sustainable approach to convert CO₂ to value-added chemicals. Cu and Cu alloys are considered to be potential catalysts for CO₂ reduction among numerous catalysts. Unfortunately, the product selectivity and conversion efficiency during the CO₂RR are severely limited by ...
... DNA-templated silver nanoclusters (DNA/AgNCs) serve as a useful electrochemical sensing nanomaterial characterized by excellent electroactivity and good stability, while the effect of surrounding nucleotides on their electroactivity has not been studied. Herein, we validated a nucleotide-assisted enhancement mechanism of the DNA/AgNCs electroactivity caused by T-rich nucleic acid sequences in the ...
desorption; electrodes; fluorescence microscopy; models; neoplasms; semiconductors; silicon; tin dioxide
Abstract:
... Selective isolation of individual target cells from a heterogeneous population is technically challenging; however, the ability to retrieve single cells can have high significance in various aspects of biological research. Here, we present a new photoelectrochemical surface based on a transparent electrode that is compatible with high-resolution fluorescence microscopy for isolating individual rar ...
... A novel electrochemical sensor for therapeutic drug monitoring (TDM) of antibiotic Zavicefta was developed in this work. The main components of Zavicefta are ceftazidime (CFZ) and avibactam (AVI), wherein CFZ can be oxidized directly on electrode surface, while AVI is non-electroactive. In order to realize the simultaneous detection of the two analytes on one sensor, we elaborately constructed a d ...
carbon dioxide; density functional theory; electrochemistry; electrodes; electron transfer; energy conversion; formates; methane; methanol; oxidation; oxygen; porphyrins
Abstract:
... Oxidation of methane at ambient conditions to useful oxygenates at a bilayer-coated electrode is demonstrated. The composition of the coating, a Mn porphyrin mediator layer on top of a N(OH)₂/NiOOH one, allows a cascade of oxygen transfer events upon applying a potential. It is shown, using (spectro)electrochemical techniques, density functional theory computations and product analytical methods, ...
... Cannabis is currently one of the most consumed drugs in many countries. Δ⁹-tetrahydrocannabinol (THC) is the principal psychoactive component of this drug and is present in saliva after consumption. This paper reports a novel biomolecule-free electrochemical approach to detect an ultra-low level of THC in saliva using modified electrodes with molecules of the same analyte (THC) that are detected l ...
... The fabrication of a cloth-based analytical device combined with electrochemiluminescence detection was established for the rapid determination of salbutamol in pork samples. A hand-coloring method to pattern the hydrophobic chamber was employed, and a three-carbon electrode system was subsequently screen printed onto the patterned cotton chamber. Further modifications of the working electrode sur ...
... The burgeoning development of lithium-ion battery technology is imperative, not only realizing targets for reducing greenhouse gas emissions, but also changing the way of global communication and transportation. As the demand increases, the quantity of discarded lithium-ion batteries (LIBs) has been continuously rising, bringing a tough waste-management challenge for recycling service sectors at e ...
bioelectricity; electrodes; heavy metals; metabolism; microbial fuel cells; research and development; toxicity
Abstract:
... Implicit interaction of electroactive microbes with solid electrodes is an interesting phenomenon in nature, which supported development of bioelectrochemical systems (BESs), especially the microbial fuel cell (MFCs) for valorization of low-value waste streams into bioelectricity. Intriguingly, the metabolism of interacted microbes with electrode is affected by the microenvironment at electrodes, ...
... Despite being an old process from the end of the 19ᵗʰ century, electrosorption has attracted renewed attention in recent years because of its unique properties and advantages compared to other separation technologies and due to the concomitant development of new porous electrode materials. Electrosorption offer the advantage to separate the pollutants from wastewater with the possibility of select ...
affordability; carbon; diagnostic techniques; dielectrophoresis; electric field; electrodes; electrophoresis; electroplating; health services; motivation; silicon; therapeutics
Abstract:
... The sorting of targeted cells in a sample is a cornerstone of healthcare diagnostics and therapeutics. This work focuses on the use of dielectrophoresis for the selective sorting of targeted bioparticles in a sample and how the lack of throughput has been one important practical challenge to its widespread practical implementation. Increasing the cross‐sectional area of a channel can lead to highe ...
... Leptin is a peptide hormone produced in adipose tissue that works as an antiobesity hormone by balancing energy intake and expenditure. We aimed to develop an ultrasensitive electrochemical immunosensor based on a novel immobilization technique for the early detection of leptin-related diseases in this work. Although several methods for immobilizing antibodies to the biosensor recognition element ...
... In this study, Chitosan/ZnO nanocomposite (Ch/ZnO) and egg white/ZnO rice structured composite was synthesized by simple wet chemical technique and characterised by various techniques. A comparative electrochemical analysis were carried out and determined that egg white/ZnO rice structured composite modified screen printed electrode (SPCE) showed good electrochemical behaviour. The electrochemical ...
... In this work, we developed a novel label-free and highly sensitive electrochemical (EC) biosensor for detection of microRNA (miRNA), which was based on the target-triggered and the Cu-based metal-organic frameworks (Cu-MOFs) mediated CHA-HCR dual-amplification process. Initially, the target miRNA triggered the catalytic hairpin assembly (CHA) process of hairpin DNA 1 (H1) and hairpin DNA 2 (H2) to ...
... β-Amyloid (Aβ) peptides can bind both Cu²⁺ and heme cofactors simultaneously to form heme–Cu²⁺–Aβ complexes, which are proposed to generate toxic partially reduced oxygen species (PROS, e.g., H₂O₂) and play a vital role in Alzheimer's disease (AD). In this paper, a competitive dual-mechanism-driven electrochemiluminescence (ECL) aptasensor integrating the synergistic enhancement and steric hindran ...
... Recently, aqueous rechargeable batteries employing ammonium-ions (NH₄⁺) as charge carriers have received increasing interest because of their merits of eco-friendly, low cost and sustainability. However, the supercapacitor based on NH₄⁺ charge carriers has rarely been reported probably owing to the lack of a suitable system to achieve acceptable capacitance and cycle performance for NH₄⁺ storage. ...
biomarkers; electrochemistry; electrodes; electron transfer; immunoassays; immunosensors; phosphopyruvate hydratase
Abstract:
... In this work, a dual-signal output electrochemical immunosensor based on the Au–MoS₂/MOF high-efficiency catalytic cycle amplification strategy for the sensitive detection of neuron-specific enolase (NSE). The mixed-valence structure MOF (Fe²⁺/Fe³⁺-MOF) exhibits high-speed charge mobility and excellent electrochemical performance. Notably, nanoflowers-like MoS₂ (MoS₂ NFs), as a co-catalyst, were i ...
... We developed a flexible supercapacitor (SC) cell with biocompatible oxidized single-walled carbon nanotubes (SWCNTs) driven by electrolytes in body fluids through integration with a wireless sensor network for use in implantable electronic medical devices (IEMDs). The SC was assembled using oxidized SWCNTs (Ox-SWCNTs) in the form of binder-free buckypaper as an electrode material, which is both bi ...
... High-sensitive textile sensor acts the key component of electronic wearable products. It is a challenge to low-cost fabricate flexible sensors that possess excellent response reliability. In this regard, we employ a facile method combined with electroless nickel plating and carbonization to fabricate textured Ni-coated carbon tube (Te-CNiT) electrode, used as sensitive material for resistive senso ...
... Trace determination of antibacterial agents is crucial to minimize risks of human intoxication and in the prevention of serious environmental impacts. Herein, a simple one-pot solvothermal synthesis approach for a magnetic iron oxide embed nitrogen-doped graphene (MIO@NG) nanohybrid was fabricated without the addition of any extra reductant and its application towards ultrasensitive chloramphenico ...
... 5-hydroxymethylcytosine (5hmC) is a key epigenetic mark in the mammalian genome that has been proposed as a promising cancer biomarker with diagnostic and prognostic potentials. A new type of two-dimensional (2D) material called MXene includes transition metal carbides and nitrides and possesses unique physico-chemical properties suitable for diverse applications, including electrochemical sensors ...
... Flexible and self-healing supercapacitors are urgently needed to meet the practical applications of flexible and wearable electronics. Herein, we have prepared a flexible and self-healing supercapacitor by sandwiching a self-healing physically cross-linked PVA–H₂SO₄ electrolyte separator between two activated carbon cloth (ACC)/MnO₂ electrode films. The ACC/MnO₂ electrode is prepared by activation ...
... Conductive polymers with good flexibility, conductivity and film-forming ability attract a lot of attention. In this work, a large-area and ordered structure poly(3,4-ethylenedioxythiophene) (PEDOT) film is fabricated at the air-water interface through interface synthesis method. The PEDOT film can be directly placed on a flexible screen-printed electrode, but also has good adhesion between them. ...
aerogels; capacitance; deformation; electrochemical capacitors; electrochemistry; electrodes; energy; energy density; foams; graphene oxide; hot water treatment; nickel; nickel oxide
Abstract:
... This work demonstrates a hierarchical structure design with mixed holey graphene oxide (HGO) and Ni(OH)₂ active material layer made by one-pot hydrothermal reaction clinging to Nickel foam as backbone and ice-template oriented graphene oxide (GO) aerogel as filling, aiming to create an asymmetric solid supercapacitor (ASC) device with compliable flexibility and high electrochemical performance. Th ...
batteries; chemical communication; electrodes; materials; oxides; vanadium
Abstract:
... A 1.55 nm-interlayer spacing-expanded polyaniline-intercalated vanadium oxide, as a new electrode material for NH₄⁺-ion batteries, exhibits the highest ever reported capacity of ∼307 mA h g⁻¹ at a current density of 0.5 A g⁻¹. In situ FT-IR and XPS studies confirm the reversible NH₄⁺ storage is accompanied by H bond formation/breaking within the functional group of –VO···H. ...
... In recent years, copper-based electrodes have attracted intense attention for the electrochemical reduction of nitrate (NO₃⁻), the so-called ECRN. However, these electrodes suffer from low activity and selectivity. Herein, we report a novel Cu-based electrode (IE-Cu-400) for the ECRN fabricated by loading Cu-based nanoparticles onto graphite felt using in situ electrodeposition followed by anneali ...
electrochemistry; electrodes; electron transfer; graphene; hydrogen production
Abstract:
... Achieving long term stability of single graphene sheets towards repeated electrochemical hydrogen evolution reaction (HER) cycling has been challenging. Here, we show through appropriate electrode preparation that it is possible to obtain highly durable isolated graphene electrodes, which can survive several hundreds of HER cycles with virtually no damage to the sp²-carbon framework and persistent ...
Khalil Abnous; Ali khakshour Abdolabadi; Mohammad Ramezani; Mona Alibolandi; Morteza Alinezhad Nameghi; TaranehSadat Zavvar; Zahra Khoshbin; Parirokh Lavaee; Seyed Mohammad Taghdisi; Noor Mohammad Danesh
... Cocaine is one of the mainly used illegal drugs in the world. Using the signal amplification elements of terminal deoxynucleotidyl transferase (TdT) and CRISPR-Cas12a, a highly sensitive and simple electrochemical aptasensor was introduced for cocaine quantification. When, no cocaine existed in the sample, the 3′-end of complementary strand of aptamer (CS) was extended by TdT, leading to the activ ...
... Abrin is a highly toxic ribosome-inactivating protein, which could be used as a biological warfare agent and terrorist weapon, and thus needs to be detected efficiently and accurately. Affibodies are a new class of engineered affinity proteins with small size, high affinity, high stability, favorable folding and good robustness, but they have rarely played a role in biological detection. In this w ...
... A hybrid sensing system, which combines simultaneous cyclic voltammetric (CV) and UV–vis absorbance measurements using a commercial carbon screen-printed electrode and a set of optical fibres in disposable cuvettes, is proposed. The hybrid system approach was applied to 27 samples of recognized beer brands, improving the classification power as compared to only voltammetric or only spectrophotomet ...
... Growth differentiation factor-15 (GDF-15) is a member of the transforming growth factor-β family. GDF-15 is overexpressed in cardiovascular diseases and has become a novel biomarker for these diseases. In this study, we fabricated a label-free electrochemical immunosensor for sensitive detection of GDF-15. Briefly, a three-dimensional braided composite of AuPtCu-SWCNTs@MoS₂-rGO (denoted A@M), whic ...
... Ratiometric electrochemical assays have been demonstrated to be more sensitive and selective in various sensing events, mainly due to their affordable built-in correction and good self-reference capability. But it is known that complicated modification and labeling operations usually are necessary for the construction of ratiometric electrochemical assays, therefore is a hot and important issue ne ...
... In the present work, a highly selective and metal-free electrochemical sensor was fabricated from the fusion of nanocellulose and polypyrrole (NNC-PPY), incorporated with single-walled carbon nanotubes (SWCNTs) via drop-casting method for the simultaneous determination of paracetamol (PCM) and ciprofloxacin (CPR). The screen printed electrode (SPE) modified with NNC-PPY/SWCNTs shows outstanding el ...
... A microfluidic based biosensor was investigated for rapid and simultaneous detection of Salmonella, Legionella, and Escherichia coli O157:H7 in tap water and wastewater. The biosensor consisted of two sets of focusing electrodes connected in parallel and three sets of interdigitated electrodes (IDE) arrays. The electrodes enabled the biosensor to concentrate and detect bacteria at both low and hig ...
... Photoelectrochemical (PEC) detection is a widely used detection method that uses light to stimulate and photocurrent signals to detect the target. Due to the disengagement of the excitation unit and the detection unit, the PEC background signal is reduced, and the detection sensitivity is improved. In this work, we report the first demonstration of PEC detection for microfluidic cloth-based analyt ...
... Azo dyes are typical toxic and refractory organic pollutants widely used in the textile industry. Bio-electrochemical systems (BESs) have great potential for the treatment of azo dyes with the help of microorganisms as biocatalysts and have advanced significantly in recent years. However, the latest and significant advancement and achievements of BESs treating azo dyes have not been reviewed since ...
... The development of high-efficiency and cost-effective difunctional electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are highly attractive to fulfill the practical water electrolysis. Herein, a novel low-cost difunctional cobalt-nickel sulfide (Co₃S₄/Ni₃S₂) flower-like heterostructures are purposely loaded on the surface of polypyrrole (PPy) nanosheets ...
aptasensors; blood serum; detection limit; electric current; electrodes; electron transfer; humans; irradiation; nanorods; oligonucleotides; photostability
Abstract:
... Due to its capability of low spectral interference, high light stability, and minimal photodamage to biological species, near-infrared (NIR) light is advantageous in biosensing and biochemical analysis. This work developed a photoelectrochemical (PEC) aptasensor for adenosine triphosphate (ATP) detection using NIR light as the irradiation source. In order to utilize NIR light, we prepared Yb-doped ...
antimony; dielectric permittivity; electric generators; electric potential difference; electrodes; nanowires; surface area; surface roughness
Abstract:
... In this paper, a compressed antimony selenoiodide (SbSeI)-based hybrid piezo/triboelectric nanogenerator for mechanical energy harvesting is presented for the first time. Sonochemically-fabricated SbSeI nanowires were compressed under high pressure (120 MPa) to form a pellet for use as an experimental electrode. Kapton film was utilized as the other electrode. The basic parameters used for the tri ...
carbon nanotubes; electrochemical capacitors; electrodes; electrolytes; electronics; energy density; potassium
Abstract:
... Hybrid supercapacitors (HSCs) with the characteristics of high energy density, long cycle life and without altering their power density need to be developed urgently. Herein, a novel dual-ion hybrid supercapacitors (DHSCs) with Ni(OH)₂ nanotube arrays (NTAs) as positive electrode and V₂O₅ directly grown on freestanding carbon nanotubes (CNTs) as negative electrode is assembled. In charging mechani ...
ambient temperature; capacitance; carbon; electrochemical capacitors; electrodes; energy; energy density; surface area
Abstract:
... In this paper, a new hexagonal prismatic Zn-MOF is rapidly synthesized at room temperature through a one-step precipitation method as precursor for the preparation of porous carbon. The SEM and GCD tests indicate that the pre-ionization process of BTC greatly accelerates the reaction speed between BTC and Zn ions, and only 0.5 h is required for the preparation of Zn-MOF with orderly morphology at ...
... A polyvinyl chloride (PVC) membrane sensor was developed to accurately detect beef taste quality grades. The beef taste was identified by the Fisher discriminant and verified by sensory evaluation. The PVC membrane sensor with the maximum open circuit potential (OCP) value and excellent performance was composed of 0.4 mL of dibutyl phthalate (DBP), 0.25 mL of lauryl ether phosphate, 3.6 mg of magn ...
... Artificial peroxisome is of critical importance to supersede natural peroxisome in fabricating protocell system and disease treatment. Nevertheless, developing feasible artificial peroxisome with various stable functions remains a monumental challenge. Nanozyme with multiple enzyme-like activities can mimic natural enzymes in peroxisome, which make it a prospective candidate for artificial peroxis ...
... A nano IrₓMn₍₁₋ₓ₎Oy hybrid electrode with a L1₂-IrMn₃ phase was used as a bifunctional catalyst with ultra-low iridium loading for overall water electrolysis in an acid solution for the first time. The HER activity of the IrₓMn₍₁₋ₓ₎Oy hybrid electrode not only exceeded that of IrO₂, but also exceeded that of Pt/C. The OER activity of the IrₓMn₍₁₋ₓ₎Oy hybrid electrode also exceeded that of IrO₂. ...
... A novel biochar electrode Bio-Fe₃O₄/CF used for electroreduction of nitrate was prepared by the hydrothermal synthesis method. The results showed that the growth of spherical Fe₃O₄ on the surface of smooth biochar can significantly increase the nitrate reduction rate. Besides, the presence of Cl and Br in the solution could promote the conversion of NH₄⁺ to N₂, thereby regulating the element nitro ...
... The rapid, efficient, and objective evaluation of active antioxidant components is of great significance for the basic research of natural products and food quality. In this work, a three-dimensional (3D) cell culture system-based electrochemical biosensor for H₂O₂ detection based on the relationship between the H₂O₂ extracellular level and the current signal response was developed, which could be ...
... Aflatoxin M₁ (AFM₁) is a common toxin in dairy products that causes acute and chronic human health disorders. Thus, the development of a rapid and accurate AFM₁ detection method is of vital importance for food safety monitoring. This work was to develop a novel electrochemical aptasensor for sensitive and specific determination of AFM₁. The dendritic-like nanostructure was formed on the gold elect ...
... In this present paper, a novel electrochemical sensor based on a covalent organic framework (COF) and lanthanum oxide (La₂O₃) and multi-wall carbon nanotubes (MWCNTS) was prepared for sensitive and selective detection of dopamine (DA) and uric acid (UA). The sensor demonstrated excellent analytical performance for DA and UA owing to the synergistic effect among large surface area of COF, highly co ...
... Similar to acetylcholinesterase, the activity of plant-derived esterase can also be inhibited by organophosphorus pesticides. Therefore, an electrochemical sensing platform using kidney bean esterase as a new detection enzyme was proposed for the highly sensitive determination of organophosphorus pesticides. Purified kidney bean esterase was obtained by an efficient and economical aqueous two-phas ...
carbon nitride; chemical species; composite materials; crystal structure; detection limit; electrochemistry; electrodes; fipronil; hot water treatment; metabolites; oxidation; pH; sensors (equipment); titanium dioxide; toxicity; voltammetry
Abstract:
... For the first time, a simple and sensitive electrochemical sensor based on a screen printed electrode (SPE) modified with titanium dioxide (TiO₂) and polytriazine imide submicrostructured composite (TiO₂-PTI) has been developed for the simultaneous detection of fipronil (FIP) and its toxic metabolite fipronil sulfone (FIP-S). The submicrostructured composite material based on TiO₂ and PTI was obta ...
... This work presents an all-in-one origami paper-based electrochemical platform for simple and inexpensive l-cysteine (Cys) detection using Cys as a monomer for modifying electrode surfaces. The proposed method combines the steps of electropolymerization and detection into a single device to offer a highly convenient method for the end-user. In comparison, the sensitivity toward Cys detection is a s ...
... A self-cleaning electrochemical biosensor based on two-dimensional Cu-porphyrin (Cu-TCPP) metal-organic framework nanofilms, novel super G-quadruplex (G4), and DNA nanomotors was developed for the cyclic detection of Pb²⁺ ions. The Cu-TCPP framework with inherent peroxidase activity can create an ultra-thin nanofilm that functioned as a carrier to support the metastable G4 comprising four individu ...
biodegradation; coprecipitation; electrochemistry; electrodes; groundwater; iron; long term effects; magnetite; migratory behavior; mineralization; oxidation; pH; radioactivity; raw materials; remediation; seepage; uranium; water quality
Abstract:
... Reduction of the migratory ability of uranium via reduction, co-precipitation or immobilization is a widely used technology for remediation of uranium contaminated groundwater (UCG). However, the re-released uranium due to environmental alterations such as oxidation, acid dissolution, or microbial decomposition limits the long-term effect of UCG remediation. Here, we developed a novel solar-powere ...
... In this work, a novel triazine-based covalent organic framework (TS-COF) was constructed by the condensation of 1, 3, 5-tris-(4-aminophenyl)triazine (TAPT) and squaric acid (SA) under solvothermal condition. By in situ growth of Au nanoparticles (AuNPs) on the surface of TS-COF, the AuNPs@TS-COF composite with enhanced electroactivity was prepared successfully. After introduction of reduced graphe ...
... Whole peptide-displayed phage particles are promising alternatives to antibodies in sensor development; however, greater control and functionalization of these particles are required. In this study, we aimed to identify and create highly sensitive and selective phage-based electrochemical biosensors for detecting ovomucoid, a known food allergen. Phage display was performed using two different pha ...
... While significant progress in PEMFC research has been achieved in recent years, simulation of liquid water formation and transport accurately still remains a significant challenge. Under wet operating conditions, liquid water may condense in the channel, gas diffusion layer, or electrode, which introduces complicated transport phenomena. In this work, we present a physics-based, steady-state, 1-D, ...
... Conductive metal–organic frameworks can provide unique porous structures, large pore volumes, many catalytically active sites and high crystallinity, and so are becoming increasingly important and attractive as electrocatalytic materials. The present work synthesized nanorods of the conductive compound Ni₃(2,3,6,7,10,11-hexaiminotriphenylene)₂ (Ni₃(HITP)₂) with a high degree of crystallinity from ...
... The exosome is considered a useful biomarker for the early diagnosis of cancer. However, pretreatment of samples used in diagnosis is time-consuming. Herein, we fabricated a capacitance-based electrical biosensor that requires no pretreatment of the sample; it is composed of a DNA aptamer/molybdenum disulfide (MoS₂) heterolayer on an interdigitated micro-gap electrode (IDMGE)/printed circuit board ...
active ingredients; capacitance; electrochemical capacitors; electrochemistry; electrodes; electrolytes; energy density; hydrogels; polymerization; pyrroles
Abstract:
... A quasi-solid-state flexible symmetric supercapacitor (QFSSC) based on waste surgical masks (WSMs) with high electrochemical performance and high flexibility has been designed. The WSMs with three-layer construction have been fully utilized to fabricate the QFSSC. The two outer layers are served as the flexible substrate to achieve flexible electrodes by loading polypyrrole (PPy) microcones via el ...
... An ultrasensitive and selective voltammetric sensor with ultra-trace level detection limit is introduced for idarubicin (IDA) determination in real samples. The as-synthesized nanocomposite was characterized by several techniques, including Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Raman spectroscopy, Energy-dispersive X-ray spectroscopy (EDX), and Field emission sc ...
... Sodium chloride (NaCl), as one of the most naturally abundant compounds, plays an irreplaceable role in industrial development and human life. In recent years, NaCl has received significant attention in the field of electrochemical energy due to its unique physicochemical properties, environmental friendliness and low cost. This paper reviews the recent progress in the utilization of NaCl in elect ...
... Electrical stimulation can be used for the treatment of various nerve and muscle injuries as well as acute and chronic pain conditions. An electrical pulse is applied to a muscle or nerve to activate excitable tissue using internal or external electrodes with the aim of building muscle strength, artificially creating or supporting limb movement or reducing pain. Textile electrodes offer several ad ...
... Bio-electro-Fenton (BEF) systems have been potentially studied as a promising technology to achieve environmental organic pollutants degradation and bioelectricity generation. The BEF systems are interesting and constantly expanding fields of science and technology. These emerging technologies, coupled with anodic microbial metabolisms and electrochemical Fenton's reactions, are considered suitabl ...
electric potential difference; electrodes; technology
Abstract:
... Breakage plays an important role in mineral processing, and consumes a large amount of energy. Recently, widespread attentions have been drawn into high voltage pulse breakage technology (HVPB), and good prospects in mineral processing have been reported. The existing study mainly focus on the pulse discharge parameters and ore characteristics, and the important part of HVPB - discharge in water i ...
electrodes; landfill leachates; municipal solid waste; oxidation; urbanization; waste disposal
Abstract:
... With the expansion of urbanisation, the total amount of solid waste produced by urban residents has been increasing, and the problem of municipal solid waste disposal has also been aggravated. Landfill leachate treatment technologies could be divided into three categories: biological, physical and advanced oxidation treatment technology. Among them, advanced oxidation treatment technology has a go ...
... A new chemically disposable screen-printed modified electrode with yttrium doped manganese oxide (Mn2O3/Y2O3) nanocomposite at screen printed electrode was mainly constructed to quantify xylometazoline hydrochloride (XMZ). The crystallographic parameters were estimated from the XRD spectrum, suggesting that Mn₂O₃ of cubic phase with average grain size ∼ 77 nm. The SEM images revealed that Y³⁺ dopa ...
... Artificial food preservatives are widely utilized across the globe to prolong shelf life of food. In this paper, a highly sensitive and cost-effective electrochemical sensor for the nanomolar detection of synthetic antioxidant tert-butyl hydroquinone (TBHQ) commonly used as a food preservative is reported. A hybrid nanocomposite was sonochemically prepared by embedding surface functionalized carbo ...
... A simple and sensitive electrochemical cholesterol biosensor was fabricated based on ceramic-coated liposome (cerasome) and graphene quantum dots (GQDs) with good conductivity. The cerasome consists of a lipid-bilayer membrane and a ceramic surface as a soft biomimetic interface, and the mild layer-by-layer self-assembled method as the immobilization strategy on the surface of the modified electro ...
... A label-free electrochemical immunosensor has advantages of real-time and rapid detection, but it is weak in detection of small molecular toxins such as aflatoxin B₁ (AFB₁). The greatest obstacle to achieving this is that small molecules bound to a common immunosensing interface cannot interfere with electron transfer effectively and the detection signal is so weak. Therefore, a sensitive electroc ...
... A sensitive biosensor that can be used for the determination of matrix metalloproteinase 2 (MMP-2) was proposed. The biosensor was developed by using an excellent self-enhanced nanocomposites as an illuminant and a peptide as a recognition element. For the electrostatic attraction between Ru(bpy)₃²⁺ and nitrogen-doped graphene quantum dots (NGQDs), the self-enhanced electrochemiluminescence (ECL) ...
... A self-supported silver electrode was prepared by plasma spraying and used for catalysing the hydrogen evolution reaction. Thanks to the non-equilibrium synthetic conditions, the silver catalyst exposes high-energy (200) crystal planes, which enhance the adsorption of hydrogen and improve the intrinsic catalytic activity. As a result, the silver catalyst delivers an overpotential of 349 mV at 10 m ...
... In this study, we report a portable kit consisting of a portable workstation, gold screen-printed electrode (SPE), 0.45 μm filter membrane, phosphate buffer solution (PBS), and acetic acid (1%) for point-of-use (POU) analysis of nicotine in tobacco. The activated-screen-printed electrode (A-SPE) displayed superior electron transmission efficiency, and the A-SPE without modification was employed fo ...
... Trace metals such as lead and mercury can be present in beverages by contamination during production and storage processes, or by the use of hops and brewing grains that may be contaminated with trace metals. Since these metals are harmful to human health, their presence is strictly controlled by regulatory agencies. In this aspect, the present work presents the development of a new procedure for ...
... An electrochemical immunosensor for the accurate detection of cat neutrophil gelatinase-associated lipocalin (NGAL) in urine samples based on an electrode with a monolayer of gold nanoparticles (AuNPs) was proposed in this study. To fabricate the sensing electrode, a nickel mold with concave micron hemisphere array was prepared and then used to transfer the micron hemispherical structure onto a po ...
... Soybean is the most produced crop in Argentina, and 99 % corresponds to genetically modified soybean. One of the main produced varieties is Roundup Ready® soybean (RR), which was modified to express the enzyme CP4 5-enolpyruvylshikimate 3-phosphate synthase (CP4 EPSPS), which confers resistance to glyphosate, the main herbicide worldwide used. The possible impact of genetically modified organisms ...
... Antimony(III) is a rare electroactive specie present on Earth, whose concentration is not typically determined. The presence of high concentrations of antimony is responsible for a variety of diseases, which makes it desirable to find convenient and reliable methods for its determination. We have developed a convenient glassy carbon modified electrode with electroreduced graphene oxide GC/rGO for ...
... The work presented here describes a highly sensitive and simple electrochemical sensor for the detection of Sudan I dye based on a nanocomposite made of MoS₂ heterogeneous nanosheets (1T@2H-MoS₂) and carboxylated carbon nanotubes (cMWCNTs) (1T@2H-MoS₂/cMWCNTs). XPS results indicate that the content of 1T phase MoS₂ was estimated to be 72% in 1T@2H-MoS₂. Electron microscopy results show that the tu ...
absorption; electric current; electrodes; glass transition temperature; ligands; quantum dots; solar energy; solar radiation
Abstract:
... Advances in the surface ligand exchange process of all-inorganic CsPbI₃ perovskite colloidal quantum dots (PQDs) have enabled the fabrication of conductive PQD solids and their utilization as photovoltaic (PV) absorbers in next-generation solution-processed thin-film solar cells. However, PQD absorbers fabricated using the ligand exchange approach for application in high-efficiency PQD solar cells ...