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6353883 
Journal Article 
A high output magneto-mechano-triboelectric generator enabled by accelerated water-soluble nano-bullets for powering a wireless indoor positioning system (Electronic supplementary information (ESI) available. See DOI: 10.1039/c8ee03008a) 
Kyung-Won, L; Peddigari, M; Park, CH; Ha Young, L; Min, Y; Jong-Woo, K; Cheol-Woo, A; Jong-Jin, C; Byung-Dong, H; Joon-Hwan, C; Dong-Soo, P; Jae-Keun, H; Jong-Taek, Y; Woon-Ha, Y; Ryu, J; Yi, SN; Hwang, GT 
2019 
12 
2 
666-666 
A high-performance magneto-mechano-triboelectric nanogenerator (MMTEG) was demonstrated by introducing accelerated water-soluble nano-bullet modified nanostructures to convert a gentle magnetic field into electric energy for powering an indoor wireless positioning system. NaCl salt nanoparticles were accelerated by an aerosol deposition (AD) process to collide on a perfluoroalkoxy (PFA) film with a high kinetic energy for the formation of a complicated nanomorphology on the triboelectric active surface. Under an alternating current (AC) magnetic field of 7 Oe, the MMTEG generated an open-circuit peak-to-peak voltage (Vpp) and a short-circuit current of 708 V and 277 µA, respectively. The harvesting device also presented a maximum peak power of 21.8 mW as well as a continuous AC output power of 4.8 mW (4.8 mJ per second). A self-powered indoor IoT positioning system was constructed by integrating the MMTEG, a power managing circuit, a storage element, and an IoT Bluetooth beacon. The electric energy from the MMTEG device enabled continuous operation of a beacon device, and we successfully confirmed the accurate location of the installed wireless positioning system, subsequently resulting in transmission of our indoor position to the main monitoring computer. Lastly, the MMTEG generated an open-circuit Vpp and a short-circuit current of 330 V and 23 µA, respectively, near a 60 Hz power cable connected to home appliances, which were large enough to turn on 108 blue light emitting diodes (LEDs). 
Magnetic fields; Nanoparticles; Water chemistry; Information systems; Electric appliances; Sodium chloride; Position (location); Circuits; Kinetic energy; Organic light emitting diodes; Short circuit currents; Bluetooth; Indoor environments; Household appliances; Product design; Nanotechnology; Power cables; Alternating current; Short-circuit current; Projectiles; Energy storage/