• Silver nanoparticles as a bifunctional probe for label-free and reagentless colorimetric hydrogen peroxide chemosensor and cholesterol biosensorSilver nanoparticles as a bifunctional probe for label-free and reagentless colorimetric hydrogen peroxide chemosensor and cholesterol biosensor

    A colorimetric chemosensor for hydrogen peroxide (H2O2) and biosensor for cholesterol is developed in this work following a ‘label-free and reagentless’ concept. In this strategy, silver nanoparticles (AgNPs) are used as a bifunctional probe, namely, a chemical capture probe for H2O2 recognition and a signal probe for displaying detection result...

    pdf7 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 452 | Lượt tải: 0

  • Low operating voltage resistive random access memory based on graphene oxideepolyvinyl alcohol nanocomposite thin filmsLow operating voltage resistive random access memory based on graphene oxideepolyvinyl alcohol nanocomposite thin films

    A high-performance non-volatile memory with low power consumption for long battery life and for large data storage is one of the key requirements of the wearable and other electronic Internet of Things (IoT) devices. In this study, we have fabricated and investigated the resistive switching behavior of an RRAM device using the nanocomposite of p...

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  • Oxidation-controlled magnetism and Verwey transition in Fe/Fe3O4 lamellaeOxidation-controlled magnetism and Verwey transition in Fe/Fe3O4 lamellae

    The structural and magnetic properties of Fe/Fe3O4 nanocomposites, synthesized by combined high energy ball milling and controlled oxidation, have been studied. An X-ray diffraction analysis of the crystal structure of the nanocomposites confirmed the coexistence of Fe and Fe3O4 phases. An increase of the oxygen concentration during oxidation pr...

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  • Balance between the explored Pt counter electrode in an electrolyte medium and the photoanode for highly efficient liquid-junction photovoltaic devicesBalance between the explored Pt counter electrode in an electrolyte medium and the photoanode for highly efficient liquid-junction photovoltaic devices

    This work investigates the effect of the ratio of the explored Pt area in the electrolyte medium and the photoanode area (REP) on the performance of dye-sensitized solar cells (DSCs). It is found that the power conversion efficiency of DSCs increases by the ascending REP. The highest power conversion efficiency, which was obtained for the cell w...

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  • Magnetic interactions and spin-wave stiffness constant of In-substituted yttrium iron garnetsMagnetic interactions and spin-wave stiffness constant of In-substituted yttrium iron garnets

    a b s t r a c t Indium-substituted yttrium iron garnet samples, Y3Fe5xInxO12 (x ¼ 0e0.7, step 0.1), were prepared using a citrate solgel method. Synchrotron X-ray diffraction (SXRD) measurements combined with the Rietveld refinement technique were used to investigate the crystallization, structure parameters and lattice distortion in the sampl...

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  • Preparation and characterization of a chitosan/MgO composite for the effective removal of reactive blue 19 dye from aqueous solutionPreparation and characterization of a chitosan/MgO composite for the effective removal of reactive blue 19 dye from aqueous solution

    We developed a multi-functional adsorbent with excellent adsorption capacity and low contact time for reactive blue (RB) 19 dye removal. A multi-functional film based on chitosan (CS) combined with nanosized MgO was prepared by solvent casting with mild drying. The CS/MgO composite product was characterized by Fourier transform infrared spectros...

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  • Simulation of coupling optical modes in 1D photonic crystals for optoelectronic applicationsSimulation of coupling optical modes in 1D photonic crystals for optoelectronic applications

    In this paper, one-dimensional photonic crystal distributed feedback structures were chosen for simulating the photonic modes. The corresponding photonic bands were calculated by using a numerical method for solving the master equation, while the reflectivity spectra of the structures were simulated by using a rigorous coupled wave analysis metho...

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  • Porous scaffolds for bone regenerationPorous scaffolds for bone regeneration

    Globally, bone fractures due to osteoporosis occur every 20 s in people aged over 50 years. The significant healthcare costs required to manage this problem are further exacerbated by the long healing times experienced with current treatment practices. Novel treatment approaches such as tissue engineering, is using biomaterial scaffolds to stimu...

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  • Realization of a portable H2S sensing instrument based on SnO2 nanowiresRealization of a portable H2S sensing instrument based on SnO2 nanowires

    Monitoring of toxic gas in air is important because air pollution, especially in developing countries, has rapidly become severe. The high cost of installation and maintenance of a stationary analysis system by using methods such as gas chromatography limits its applications. Low-power, portable devices with relatively low-cost gas sensors are e...

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  • Calcium phosphate stability on melt electrowritten PCL scaffoldsCalcium phosphate stability on melt electrowritten PCL scaffolds

    Calcium phosphate (CaP) coating on melt electrowritten (MEW) substrates is a potential candidate for bone regeneration influencing the interaction of osteoblasts with implanted scaffolds. Pretreatment to improve hydrophilicity of the hydrophobic polymer fibres affects subsequent coating with bioactive compounds like CaP. Therefore, this study ev...

    pdf10 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 472 | Lượt tải: 0