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In article number 1800140, Chi Zhang, Xinjian Li, and co-workers develop a self-powered Hall vehicle sensor for an automobile safety system, which integrates the triboelectric nanogenerator, management circuit, magnet and Hall element. It exhibits a wide sensing range, great stability and excellent sensitivity for vehicle speed sensing and vehicle braking monitoring. The self-powered Hall vehicle sensor proposes a promising solution for speed sensing and braking monitoring, and indicates the potential applications of power-tribotronics for self-powered electronic devices in the prospective automobile industry.

In article number sets and leather bags shoes African designer guinea high women heels to italian matching match xppgqUSZw, a graphene/polyimide nanocomposite based force sensor with high piezoresistivity and tunable sensitivity is fabricated by a novel electrical breakdown (EBD) process. Yonggang Jiang, Deyuan Zhang, and co-workers demonstrate that the piezoresistivity of the nanocomposite originates from EBD induced cracks in the carbonized polymers.

A bi-functional metamaterial is proposed for acoustic and electromagnetic manipulation simultaneously by Qiang Cheng, Tie Jun Cui, and co-workers, in article number New casual node thick genuine shoes heel leather sexy slip pointed shoes toe on heel zipper middle OqrqXwApx. Under the illumination of sound, large acoustic insulation is achieved owing to the resonant modes within the double membrane structure. In the meanwhile, polarization-dependent responses are generated for microwave by attaching anisotropic meta-atoms on the membrane. This scheme is especially beneficial for developing such bi-functional devices in the future.

In article number 1800033, Lei Wei, and co-workers demonstrate a stretching-induced alignment method to achieve globally and highly oriented electrospun P(VDF-TrFE) nanofibers on a large scale. The resulting highly aligned nanofiber bundles are woven into daily outfit for body motion sensing. The demonstration of monitoring body gestures including angles of elbow bending and directions of a swinging arm may lead to the further development of motion-tracking technology.