Novel hierarchical heterostructures of double-sided ZnO nanorod (NR) arrays grown on single-crystal Ag holed microdisks (HMDs) have been prepared through a two-step aqueous strategy including ZnO seed loading and the subsequent heteroepitaxial growth of ZnO NRs on Ag HMDs. By simply adjusting the synthetic parameters, ZnO NRs with variable NR diameters (20–200 nm), lengths (100–1.8 μm) and unusual shapes (concave, tubular and sharp tips) on Ag HMDs have been realized, which endows the Ag/ZnO heterostructures with versatile morphologies. The novel Ag/ZnO heterostructures consisting of integrated 1D semiconductor/2D metal nanostructured blocks with high specific surface area (SSA) and opened spatial architectures may promise important applications related to photoelectric fields. As expected, in photocatalytic measurements, the typical Ag HMD/ZnO NR heterostructure exhibits superior catalytic activity over other catalysts of bare ZnO NRs, ZnO NR arrays or heterostructured Ag nanowires (NWs)/ZnO NRs. The synergistic effect of the unique Ag HMD/ZnO NR heterostructures contributing to the high catalytic performance has been discussed in detail.
Defect-enriched Cu/Cu 2 O–Al 2 O 3 nanoribbons with zigzag edges have been prepared and they exhibit superior degradation efficiency on tetracycline antibiotics, due to their better oxygen adsorption and capture ability.
A new effective strategy of composition-dependent assembly is first reported to synthesize length-controllable amorphous (Fe1−xNix)0.5Pt0.5 nanoalloys (nanoparticles, nanorods, and nanothreads) through phase-transfer process. The synthesized nanoalloy morphologies and structures, phase transformation behaviors, and magnetic properties were investigated by high-resolution transmission electron microscopy (HRTEM), X-ray diffraction analysis (XRD), differential scanning calorimetry (DSC), and vibration sample magnetometry (VSM) measurements. The morphologies of as-prepared amorphous nanoalloys show composition-dependent nanothread length variation from 8 μm to 600 nm, which results in different phase-transformation behaviors and magnetic properties. In particular, magnetic specificity is discovered in that the magnetic property of as-obtained amorphous nanoalloys change from soft to hard as Ni content increases, but the variation trend of annealed ones is the inverse case. Thus, a coercivity constant composition point is found at Fe21Ni31Pt48. And FeNiPt nanothreads present larger magnetic anisotropy with higher coercivity of 3kOe than that of its nanoparticles with coercivity of 2.4kOe. In addition, Ni lowers L10 kinetic ordering temperature in (Fe1−xNix)0.5Pt0.5 nanoalloy systems.
Dual Functional Lithium Lead (DFLL) blanket was proposed for its advantages of high energy exchange efficiency and on-line tritium extraction, and it was selected as the candidate test blanket module (TBM) for China Fusion Engineering Test Reactor (CFETR) and the blanket for Fusion Design Study (FDS) series fusion reactors. Considering the influence of high energy fusion neutron irradiation and high heat flux thermal load on the blanket, China Low Activation Martensitic (CLAM) steel was selected as the structural material for DFLL blanket. The structure of the blanket and the cooling internal components were pretty complicated. Meanwhile, high precision and reliability were required in the blanket fabrication. Therefore, several welding techniques, such as hot isostatic pressing diffusion bonding, tungsten inner gas welding, electron beam welding and laser beam welding were developed for the fabrication of cooling internals and the assembly of the blanket. In this work, the weldability on CLAM steel by different welding methods and the properties of as-welded and post-weld heat-treated joints were investigated. Meanwhile, the welding schemes and the assembly strategy for TBM fabrication were raised. Many tests and research efforts on scheme feasibility, process standardization, component qualification and blanket assembly were reviewed.
Fe3O4 magnetic nanoparticles were synthesized by chemical coprecipitation method using ammonia as the precipitator in the present paper. And then cellulase was immobilized on Fe3O4 magnetic nanoparticles via carbodiimide activation, which was testified by FTIR and lots of repeating catalysis experiments. The morphology of nanoparticles immobilized by cellulase was characterized by TEM, and the activity of cellulase was measured by DNS spectrophotometry. The optimum temperature (60 degrees C) and pH value (3.94-5.50) for the catalysis ablility of immobilized cellulose were studied. The result showed that compared with the native enzyme the cellulase immobilized on Fe3O4 magnetic nanoparticles has the advantages of thermal stability, storage stability, and more extensive optimum pH value.
By the employment of supramolecule templates composed of biomembrane and organic reagents, control over the morphologies and sizes of BaWO4 crystals has been successfully achieved, and a series of flower-like, sphere-like, fasciculus-like, and other morphologies of BaWO4 were obtained at room temperature. Most of the morphologies are reported for the first time. Furthermore, the control rule of supramolecule templates was also discussed. This method may satisfy the requirements of materials of various morphologies and sizes by using different supramolecule templates, and provide significant theoretical reference to the controlled synthesis of other crystals.
Developing super-foldable electronic materials and devices presents a significant challenge, as intrinsic conductive materials are unable to achieve numerous true-folding operations (super-foldable) due to limitations from short-range forces of chemical bonds. Consequently, super-foldable batteries remain unexplored. This work focused on sodium-ion batteries as a breakthrough point to advance super-foldable devices. By employing a "2+1" bioinspired strategy, we stepwise designed and assembled super-foldable components, from substrates to electrodes, and to ultimately device. This bioinspired approach completely disperses folding stress and thus prevents the breakage of chemical bonds, enabling the successful fabrication of the first super-foldable ion battery. This battery can withstand true-folding at any angle, in any direction, and for an unprecedented number of cycles-far outperforming current foldable phones with hinge structures. Remarkably, after 500,000 true-folding cycles, the battery's microstructure remains intact with no significant degradation of electrochemical performance. Real-time dynamic folding observations reveal an M-shaped folding structure within the bioinspired materials, which effectively disperses stress via bulged layers, dispersed arcs, and slidable microgrooves that work together across different directions and dimensions to achieve super-foldability. Mechanical simulations vividly verify this principle. This work represents a breakthrough in super-foldable devices, offering valuable insights and promoting practical application for future super-foldable devices.
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