The efficient extraction of targets from complex surfaces is vital for technological applications ranging environmental pollutant monitoring to analysis explosive traces and pesticide residues. In our present study, we proposed a proof-of-concept surface enhance Raman scattering (SERS) active substrate serving directly the rapid detection target molecules. novel was constructed by decorating commercial tape with colloidal gold nanoparticles (Au NPs), which simultaneously provides SERS...

Herein, we report for the first time a colorful chromogenic substrate, which displays vivid color responses in presence of different concentration analytes. Our investigation reveals that selective shortening gold nanorods (AuNRs) could generate series distinct colors covers nearly whole visible range from 400 to 760 nm. These can be easily distinguished by naked eye; as result, accuracy visual inspection greatly improved. Next, demonstrate utility AuNRs multicolor substrate develop number...

A novel method is developed to fabricate the polypyrrole (PPy) and graphene thin films on electrodes by electrochemical polymerization of pyrrole with oxide (GO) as a dopant, followed reduction GO in composite film. The PPy electrochemically reduced (eRGO)-modified electrode highly sensitive selective toward detection dopamine (DA) presence high concentrations ascorbic acid (AA) uric (UA). sensing performance PPy/eRGO-modified investigated differential pulse voltammetry (DPV), revealing...

Controllable nanoarchitecture arrays of the transition metal selenide, supported on conductive substrates, are promising materials for high-performance electrochemical energy storage and conversion applications.

Three-dimensional nickel–iron (3-D/Ni–Fe) nanostructures are exciting candidates for various applications because they produce more reaction-active sites than 1-D and 2-D nanostructured materials exhibit attractive optical, electrical catalytic properties. In this work, freestanding 3-D/Ni–Fe interconnected hierarchical nanosheets, nanospheres, porous nanospheres directly grown on a flexible carbon fiber paper (CFP) substrate by single-step hydrothermal process. Among the nanostructures,...

Abstract The large-scale use of antibiotics is causing serious water pollution problems, and it great significance to develop new technologies remove from water. As an environmentally friendly economical adsorption material, carbon derived biomass a low-cost feasible material for removing in sewage, but the current removal efficiencies are not high enough practical application. In this study, poplar wood chips used as raw magnetic biochar prepared by co-pyrolysis FeCl 3 /CaCl 2 mixed molten...

Gold nanoparticles (AuNPs) stabilized with mercaptothiadiazole ligands, 2,5-dimercapto-1,3,4-thiadiazole (DMT), 5-amino-2-mercapto-1,3,4-thiadiazole (AMT) and 5-methyl-2-mercapto-1,3,4-thiadiazole (MMT), were prepared by the reaction of respective ligands HAuCl(4) NaBH(4) in an aqueous medium. TEM images show that average size AuNPs was 6.5 ± 0.5 nm, irrespective capping ligands. The colloidal solution both DMT-capped (DMT-AuNPs) AMT-capped (AMT-AuNPs) highly stable for several months....

Electrochemiluminescence immunoassays are usually carried out through "on-electrode" strategy, i.e., sandwich-type immunoassay format, the sensitivity of which is restricted by two key bottlenecks: (1) number signal labels limited and (2) only a part could participate in electrode reaction. In this Perspective, we discuss development an "in-electrode" Faraday-cage-type concept-based immunocomplex immobilization strategy. The biggest difference from traditional one that designed uses...

In this work, we report a new biosensing platform for hepatitis B virus (HBV) DNA genosensing using cobalt oxide (Co3O4) nanostructures. The tunable morphologies of Co3O4 nanostructures such as porous nanocubes (PNCs), nanooctahedra (NOHs), and nanosticks (NSKs) are synthesized, characterized by scanning electron microscopy (SEM), transmission (TEM), X-ray diffraction (XRD) patterns, nitrogen adsorption/desorption isotherms (BET), electrochemical impedance spectral (EIS) methods. HBV probe...

The growing requirement for real-time monitoring of health factors such as heart rate, temperature, and blood glucose levels has resulted in an increase demand electrochemical sensors. This study focuses on enzyme-free sensors based 2D-MoS2 nanostructures explored by simple hydrothermal route. were characterized powder X-ray diffraction, energy-dispersive spectroscopy, scanning electron microscopy, transmission Raman XPS techniques immobilized at GCE to obtain MoS2–GCE interface. fabricated...

Functional carbon nanomaterials are significantly important for the development of high performance sensitive and selective electrochemical biosensors. In this study, graphene supported platinum nanoparticles (GN-PtNPs) nitrogen doped (N-GN-PtNPs) were synthesized by a simple chemical reduction method explored as nanocatalyst supports, well toward oxidation homocysteine (HCY) first time. Our studies demonstrate that N-doped PtNPs show higher electrocatalytic activity HCY with an experimental...

α-Fe2O3 nanofibers are synthesized by a simple and efficient electrospinning method the selective determination of folic acid (FA) is demonstrated in presence an important physiological interferent, ascorbic (AA), using nanofiber modified glassy carbon (GC) electrode at pH. Bare GC fails to determine concentration FA higher AA due surface fouling caused oxidized products FA. However, modification with not only separates voltammetric signals 420 mV between FA, but also enhances oxidation...

Herein, we suggest a novel chemical precipitation method to prepare different concentrations (0.05–0.25 M) of cobalt doped Bi2O3 nanoparticles. The prepared products exhibit excellent structural and optical properties. influence doping on the morphology was analyzed by FE-SEM confirmed HR-TEM. Furthermore, photocatalytic activities samples were studied in degradation methylene blue under visible light irradiation. Compared bare Bi2O3, 3% showed highest 135 min