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Transition metal oxides are found to have overwhelming applications in energy, electronics, catalytic, and bio-and micromechanical systems. A recent report emphasized the current advancements in molybdenum oxide (MoO x) nanowire synthesis and the corresponding surface-functionalized nanostructured materials based on our previously reported investigations. The preparation of the nanowires and their applications were systematically summarized. MoO x nanowires combined with substrates exhibited remarkable performances for high energy storage and power densities with high stability. In addition, the review concluded the future advancements of MoO x nanowires.

The acoustic performance of a textured journal bearing is studied based on computation fluid dynamic (CFD) theory and acoustic equation involved. First, a micro-grooved journal bearing is modeled through commercial software ANSYS. Then, the acoustic power levels for the journal bearing at different depths, widths, and positions of the dimples are solved through the CFD method. The numerical results show that the existence of dimples can lower the acoustic power level of the bearing. Moreover, this reduction depends on the dimple sizes and position. The dimples showing good tribological behaviors can yield severe noise.

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