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. 2023 May 23;17(12):11087–11219. doi: 10.1021/acsnano.2c12458

Figure 84.

Figure 84

Proximity sensing for smart home applications. (a) A self-powered proximity sensing walking stick enabled by the three NTENG units to help users move in darkness through the three-channel triboelectric output voltages. Reprinted with permission from ref (769), Copyright 2021, Elsevier. (b) The system architecture of a touchless hand sanitizer machine enabled by a triboelectric proximity sensor, and demonstration of activation of the system with both wet and dry hands. Reprinted with permission from ref (768), Copyright 2022, WILEY-VCH. (c)-(i) Schematic illustration of the NCTS for noncontact motion sensing and its working principle. (c)-(ii) Voltage outputs of the NCTS under various testing conditions. Reprinted with permission from ref (767), Copyright 2021, Elsevier. (d)-(i) Contactless human motion detection through a self-powered proximity sensor. (d)-(ii) Sensor response to different walking speeds. Reprinted with permission from ref (771), Copyright 2022, WILEY-VCH. (e) A wake-up system with bTENG for mechanical disturbance detection that can be applied for intruder alarm, and the output voltages at different sensing distances. Reprinted with permission under a Creative Commons CC BY license from ref (770), Copyright 2020, John Wiley and Sons.