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Triboelectric electronic skins (E‐skins) can be used as primary interactive devices for human–machine interfaces (HMIs). However, devices for seamless on‐skin operations must be soft and deformable, and attachable to and compatible with the skin. In this paper, a substrate‐free, skin‐compatible, skin‐attachable, mechanically deformable, and self‐powered E‐tattoo sticker consisting of carbon nanotubes (CNTs) and silk nanofibers (SNFs) is presented. The E‐tattoo can be imperceptibly tattooed on the skin and removed with water. When the device touches naked skin, triboelectric signals are generated. Because of the micro‐to‐nano hierarchical pores (with high surface‐to‐volume ratios), contact‐induced electrification generates a power density of ≈6 mW m−2 and pressure sensitivity of ≈0.069 kPa−1. The power generated on the tattooed skin can activate small electronic devices. Moreover, whole‐body joint movements can be monitored and tactile movements can be mapped by reading the generated electrical signals. The presented E‐tattoo system can promote the development of flexible energy and sensor systems for self‐powered, energy‐autonomous, imperceptible E‐skin devices for HMIs and artificial intelligent robotics and prostheses. [ABSTRACT FROM AUTHOR]

Triboelectric electronic skins (E‐skins) can be used as primary interactive devices for human–machine interfaces (HMIs). However, devices for seamless on‐skin operations must be soft and deformable, and attachable to and compatible with the skin. In this paper, a substrate‐free, skin‐compatible, skin‐attachable, mechanically deformable, and self‐powered E‐tattoo sticker consisting of carbon nanotubes (CNTs) and silk nanofibers (SNFs) is presented. The E‐tattoo can be imperceptibly tattooed on the skin and removed with water. When the device touches naked skin, triboelectric signals are generated. Because of the micro‐to‐nano hierarchical pores (with high surface‐to‐volume ratios), contact‐induced electrification generates a power density of ≈6 mW m−2 and pressure sensitivity of ≈0.069 kPa−1. The power generated on the tattooed skin can activate small electronic devices. Moreover, whole‐body joint movements can be monitored and tactile movements can be mapped by reading the generated electrical signals. The presented E‐tattoo system can promote the development of flexible energy and sensor systems for self‐powered, energy‐autonomous, imperceptible E‐skin devices for HMIs and artificial intelligent robotics and prostheses. [ABSTRACT FROM AUTHOR]

Self-Powered and Imperceptible Electronic Tattoos Based on Silk Protein Nanofiber and Carbon Nanotubes for Human-Machine Interfaces (Adv. Keywords: electronic skin; human-machine interface; nanofibers; tactile sensors; triboelectric EN electronic skin human-machine interface nanofibers tactile sensors triboelectric 1 1 1 08/07/21 20210805 NES 210805 B Human-Machine Interfaces b In article number 2100801, Narendar Gogurla and Sunghwan Kim design an energy tattoo system by printing carbon nanotube electrodes on a silk protein nanofiber mat that can be imperceptibly interfaced with human skin. Each individual element on the skin acts as a primary interacting device for human-machine interfaces to read the tactile movements of a fingertip through triboelectric phenomena. [Extracted from the article]

Each individual element on the skin acts as a primary interacting device for human-machine interfaces to read the tactile movements of a fingertip through triboelectric phenomena. Self-Powered and Imperceptible Electronic Tattoos Based on Silk Protein Nanofiber and Carbon Nanotubes for Human-Machine Interfaces (Adv. Keywords: electronic skin; human-machine interface; nanofibers; tactile sensors; triboelectric EN electronic skin human-machine interface nanofibers tactile sensors triboelectric 1 1 1 05/24/22 20210801 NES 210801 B Human-Machine Interfaces b In article number 2100801, Narendar Gogurla and Sunghwan Kim design an energy tattoo system by printing carbon nanotube electrodes on a silk protein nanofiber mat that can be imperceptibly interfaced with human skin. [Extracted from the article]