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Self-powered sensors have attracted significant interest for individual wearable device operation. Here, transparent and wearable single-electrode triboelectric nanogenerators (SETENGs) with high power generation are created using electrospun Ag nanowires (AgNWs)/poly­(vinylidenefluoride-cotrifluoroethylene) [P­(VDF-TrFE)] composite nanofibers (NFs). The SETENGs generate an output power density of up to 217 W/m2 with repetitive contact and separation from the surface of a latex glove. In electrospun P­(VDF-TrFE) NFs, the crystalline β-phase is highly oriented by oxygen-containing functional groups on the surface of AgNWs, endowing the F-rich surface with high electron negativity and enabling efficient triboelectrification. Additionally, 80% transmittance at a light wavelength of 550 nm, mechanical stability, and durability after 10 000 cycles at 10% strain are confirmed by filling the NF pores with plasma desorption mass spectrometry. Our SETENG acts as an effective energy harvester by powering 45 light-emitting diodes and as an excellent real-time, self-powered touch panel.

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The forming or shaping of ceramic micro-tubes is usually difficult with conventional ceramic processing. In some cases, parts that are not possible to produce by any other techniques can be fabricated with electrophoretic deposition process (EPD). In this paper, EPD is shown to be an operationally simple, rapid, and reliable technique for forming a wide range of ceramic micro-tubes required in electronic devices such as actuators, motors, optical modulators and MEMS. These topics will be discussed in detail.