Nanomagnet-silica shell (Fe3O4@SiO2) decorated with Au@Pd nanoparticles (NPs) were synthesized successfully. The characterization of Fe3O4@SiO2-NH2-Au@PdNPs was achieved using several spectroscopic and microscopic techniques. quantitative surface analysis confirmed X-ray photoelectron spectroscopy. Fe3O4@SiO2-NH2-Au@Pd0.30NPs exhibited excellent peroxidase-like activity by effectively catalyzing the oxidation 3,3′,5,5′-tetramethylbenzidine (TMB) in presence H2O2. absorption peaks at 370 652...

Cadmium telluride (CdTe) semiconductor quantum dots (QDs) are brightly luminescent nanocrystals that have emerged as a new class of fluorescent probes for in vivo bioimaging and theranostic applications. CdTe QDs toxicity to normal human cells is minimized by coating with less toxic ZnS ZnSe shell forming core–shell nanostructure. However, or insufficient prevent the leaching Cd metal ions. To further minimize toxicity, thiol dual capped CdTe/CdSe/ZnSe multi-core-multi-shell were coated...

The unique photophysical and optoelectronic properties of semiconductor quantum dot (QD) nanocrystals have paved the way for their diverse use in several application fields within chemical, physical, biology domains. In this work, we report first time on synthesis alloyed heavy metal-free MnInPSeS QDs via hot-injection organometallic pyrolysis metal precursors, organic surfactants, ligands. To make biocompatible, stable aqueous media, solution-processable, were capped with...

In this study, nanostructure kazakhstanite-like iron vanadate (FexV3xOy.H2O) was synthesized and calcined at different temperatures (100–800 °C) in a nitrogen atmosphere. The material used to modify screen-printed carbon electrodes achieve an electrocatalytic effect on the surface. relationship between calcination conditions catalytic performance of electrode towards oxidation chemotherapeutic drugs, including methotrexate (MTX) folinic acid (FA), studied. Various spectroscopic, microscopic,...

Solution-processable colloidal quantum dots (QDs) are promising materials for the development of rapid and low-cost, next-generation quantum-sensing diagnostic systems. In this study, we report on synthesis multinary Zn–Cu–In–Se–P (ZCISeP) QDs application QDs-modified electrode (QDs/SPCE) as a solid superlattice transducer interface ratiometric electrochemical detection SARS-CoV-2-S1 protein in saliva. The ZCISeP were synthesized through formation In(Zn)PSe from InP QDs, followed by...

Ensuring effective monitoring of methotrexate (MTX) levels in the bloodstream cancer patients undergoing high-dose chemotherapy is crucial to prevent potentially harmful side effects. However, absence portable analytical devices suitable for point-of-care bedside has presented a significant obstacle achieving real-time MTX monitoring. In this study, we developed an impedimetric immunosensor that doesn't require reagents measuring undiluted human blood serum. This reagentless approach...

A single run approach for rapid detection of nitrification inhibitor, dicyandiamide (DCD) using electrogenerated chlorine assisted polymerization through azo bond, under acidic conditions and at a preanodized screen printed carbon electrode (SPCE*) is presented. The role chloride containing support electrolyte in medium along with oxygen functionalities/edge sites are found to be crucial the successful oxidative subsequent adsorption oxidized products on surface. SEM, cyclic voltammetry...

Cardiovascular diseases (CVDs) refer to that affect the heart and blood vessels. CVDs are considered silent killers, which fatal (death occurs abruptly) particularly when their diagnosis is delayed. Among biomarkers related cardiovascular diseases, C-reactive protein (CRP) expressed or found in high concentrations during a cardiac event. Therefore, CRP an excellent biomarker diagnose events, therefore quantitative monitoring of necessary. Herein, we report fabrication immunosensor for...

The ferricyanide/ferrocyanide K3[Fe(CN)6]/K4[Fe(CN)6] redox couple is a widely utilized probe in electrochemistry. Buffering the system has become one of ways to generate improved electron transfer rates and stable electrochemical systems. In recent years, semiconductor quantum dots (QDs) have gained popularity as nanotags applications. Herein, we report on comparative behaviour cadmium-free AuZnFeSeS (QDs)-modified screen-printed carbon electrode (SPCE) different buffered electrolyte...

Fluorescein-doped silica nanoparticles were bioconjugated with anti-prostate-specific antigen polyclonal antibodies for fluorescence immunoassay and the detection of prostate-specific in fg mL −1 limits.

The emergence of nanoscience and nanotechnology has revitalised research interest in using copper its derived nanostructures to find exciting novel applications. In this work, mono- bimetallic gold palladium nanoparticles supported on oxide nanorods (CuONRs) were prepared their catalytic performance towards the reduction H2O2 form reactive oxygen radical species (ROS) was evaluated. characterisation microscopy spectroscopic techniques confirms successful synthesis CuONRs, CuONRs@Au6NPs,...

Abstract Selective purification of biological materials for their detection in complex sample matrix is a general challenge many researchers working the field diagnostics. Magnetic nanoparticles functionalized with molecules that impart biomolecular selectivity are therefore major interest as capture probes thus allowing magnetic separations. Nanoparticles can also be used enhanced biomarkers. In this work, an ultrasensitive sandwich‐based impedimetric immunosensor was fabricated C‐reactive...