Wi-Fi-band wireless energy harvesting

Two-dimensional MoS-enabled flexible rectenna for Wi-Fi-band wireless energy harvesting Xu Zhang et al.
The mechanical and electronic properties of two-dimensional materials make them promising for use in flexible electronics. Their atomic thickness and large-scale synthesis capability could enable the development of ‘smart skin’, which could transform ordinary objects into an intelligent distributed sensor network. Electromagnetic radiation from Wi-Fi systems operating at 2.4 and 5.9 gigahertz is becoming increasingly ubiquitous and would be ideal to harvest for powering future distributed electronics…. Here we demonstrate an atomically thin and flexible rectenna based on a MoS semiconducting–metallic-phase heterojunction with a cutoff frequency of 10 gigahertz, which represents an improvement in speed of roughly one order of magnitude compared with current state-of-the-art flexible rectifiers…By integrating the ultrafast MoS rectifier with a flexible Wi-Fi-band antenna, we fabricate a fully flexible and integrated rectenna that achieves wireless energy harvesting of electromagnetic radiation in the Wi-Fi band with zero external bias (battery-free).
Implant-Register: This could be used in electronic implantable devices which need batteries.
nature, 28 Jan 2019
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