Tài liệu Các Môn Đại Cương - Tài liệu, ebook, giáo trình, hướng dẫn

Visible-Light-induced photo-Fenton degradation of rhodamine B over Fe2O3-diatomite materials
Diatomite is mined in Phu Yen province, Vietnam and the Fe2O3-diatomite materials are synthesized by a simple process for the photo-Fenton reaction of rhodamine B (RhB) degradation. The pure diatomite and Fe2O3-diatomite materials have large pore structures representing the high adsorption ability and efficient photocatalysis. Characterizations o...
8 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 278 | Lượt tải: 0
Giant magnetoelectric effects in serial-Parallel connected Metglas/PZT arrays with magnetostrictively homogeneous laminates
To ensure the magnetostrictive softness, the homogeneity, the decrease of the shear-lag effect and the space-saving construction of narrowed longitudinal-transverse L-T magnetoelectric (ME) composites, a novel parallel-connected-multi-bars (PCMB) geometry of PZT/Metglas is proposed and investigated by simulation and experiment. In this case, Met...
7 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 350 | Lượt tải: 0
Silver 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...
7 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 262 | Lượt tải: 0
Low 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...
8 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 286 | Lượt tải: 0
Oxidation-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...
7 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 339 | Lượt tải: 0
Balance 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...
5 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 295 | Lượt tải: 0
Magnetic 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...
8 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 262 | Lượt tải: 0
Preparation 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...
8 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 324 | Lượt tải: 0
Simulation 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...
9 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 261 | Lượt tải: 0
Porous 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...
9 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 264 | Lượt tải: 0

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