Owing to their light weight, compactness, and good adaptability, soft robots are promising for applications with safe human-machine interactions. Compared with traditional rigid robots, the distributed actuation of so...
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Individual liquid droplets may be suspended in air by the high-intensity standing pressure wave generated by an acoustic levitator. A levitated droplet perturbed from its equilibrium shape oscillates due to surface te...
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Micro-metal products have recently enjoyed high demand. In addition, metal microforming has drawn increasing attention due to its net-forming capability, batch manufacturing potential, high product quality, and rela- ...
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Micro-metal products have recently enjoyed high demand. In addition, metal microforming has drawn increasing attention due to its net-forming capability, batch manufacturing potential, high product quality, and rela- tively low equipment cost. Micro-hydromechanical deep drawing （MHDD）, a typical microforming method, has been developed to take advantage of hydraulic force. With reduced dimensions, the hydraulic pressure development changes; accordingly, the lubrication condition changes from the macroscale to the microscale. A Voronoi-based finite element model is proposed in this paper to consider the change in lubrication in MHDD according to open and closed lubricant pocket theory. Simulation results agree with experimental results concerning drawing force. Changes in friction significantly affect the drawing process and the drawn cups. Moreover, defined wrinkle indexes have been shown to have a complex relationship with hydraulic pressure. High hydraulic pressure can increase the maximum drawing ratio （drawn cup height）, whereas the surface finish represented by the wear is not linearly dependent on the hydraulic pressure due to the wrinkles.
In order to improve adhesion strength between TiN coatings and WC-Co substrate, two kinds of interlayer of Co and Ti were pre-deposited before TiN coating process. Thickness and postannealing effects of each interlaye...
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The early-stage growth of defects directly affects the irradiation damage processes. High-entropy alloys have good radiation resistance, while the formation and clustering of vacancy defects, which are crucial to the ...
The early-stage growth of defects directly affects the irradiation damage processes. High-entropy alloys have good radiation resistance, while the formation and clustering of vacancy defects, which are crucial to the development of void swelling, remain inadequately investigated. This study examined the formation and binding behaviors of the small-sized vacancy clusters in the TiCrVMn alloy by the first-principle calculations and ab initio molecular dynamics simulations. The energetics and stability exhibit unpredictable due to the complexity of the local chemical environment and lattice distortion. The findings enhance comprehension of the mechanisms related to vacancy evolution in the high-entropy alloys.
A novel burning technique for making a semiconducting single-walled carbon nanotubes （SWNTs） transistor assembled by the dielectrophoretic force was suggested. The fabrication process consisted of two steps. First, ...
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A novel burning technique for making a semiconducting single-walled carbon nanotubes （SWNTs） transistor assembled by the dielectrophoretic force was suggested. The fabrication process consisted of two steps. First, to align and attach a bundle of SWNTs between the source and drain, the alternating （AC） voltage was applied to the electrodes. When a bundle of SWNTs was connected between two electrodes, some of metallic nanotubes and semi-conducing nanotubes existed together. The second step is to burn the metallic SWNTS by applying the voltage between two electrodes. With increasing the voltage, more current flowed through the metallic SWNTs, thus, the metallic SWNTs burnt earlier than the semiconducting one. This technique enables to obtain only semi-conducting SWNTs connection in the transistor. Through the 1--V characteristic graph, the moment of metallic SWNTs burning and the characteristic of semi-conducing nanotubes were verified.
We demonstrate the label-free chiral detection of metabolic molecules in urine via accumulation-assisted plasmonic chiral sensing, which will benefit the development of point-of-care devices for first-line noninvasive...
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The microstructures of EB-PVD TBC's have been characterized as a function of angular position and cylinder height on stationary cylindrical surfaces in the coating chamber. The microstructures were evaluated using...
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The microstructures of EB-PVD TBC's have been characterized as a function of angular position and cylinder height on stationary cylindrical surfaces in the coating chamber. The microstructures were evaluated using x-ray diffraction for qualitative crystallographic texture as well as by optical microscopy and scanning electron microscopy for crystal column growth morphology. The results revealed several very strong crystallographic textures as well as a variety of crystal growth morphology.
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