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Artificial bacterial flagella (ABF) are swimming microrobots that mimic the swimming motion of bacteria. The helical swimmer consists of an InGaAs/GaAs/Cr helical nanobelt tail fabricated by a self-scrolling technique with dimensions similar to a natural flagellum, and a thin soft-magnetic metal ??head?? consisting of a Cr/Ni/Au multi-layer. The swimming locomotion of ABF is precisely controlled in...
Microwave dielectric ceramics with the composition of (1-x)Ba(Ni1/2W1/2)O3-xBaTiO3 (x = 0.1-0.5) were prepared by a solid-state reaction method. A cubic-to-hexagonal phase transition occurred from x = 0.15 to 0.5, where the cubic double perovskite structure transformed into the h-BaTiO3-type hexagonal perovskite structure. In this paper, we revealed a cluster model caused by a hopping mechanism as...
Ni nanowires (NWs) are driven in water using a rotating magnetic field. The NWs show various locomotion performances under different boundary conditions. Pure rotation occurs when the two ends of the NWs are homogenously constrained. However, if the boundary conditions are different at the two ends of the NWs, tumbling motion, i.e., rotation plus translation, will be generated, which leads to the...
A series of melting experiments in the Fe-rich portion of the Fe–Ni–S system have been conducted at 19–23 GPa and 800–1100 °C. The solubility of S in the Fe–Ni solid alloy and the eutectic melting in the Fe–Ni–S system were determined as a function of Ni content. The maximum S solubility in the Fe–Ni alloy is 2.7 wt.% at 20 GPa and the eutectic temperature. The eutectic melting temperature in the...
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