AR and VR Energy IoT O2− reactive species TENG acoustic energy harvesting coniform Helmholtz resonator contact-separation mode corona charging dioxygen activation energy harvesting fluid dynamics sensing human-machine interaction knowledge graph light-emitting diode low-cost luminescent solar concentrators magnetic magnetorheological elastomer mechanical energy metal halide perovskite multi-source data nanogenerator nanomaterials organogel photodetector pressure sensing rare-earth metal remote telemetry and control representation learning