Gold nanomesh enables ultra-breathable skin electronics: Page 2 of 2

September 07, 2017 //By Julien Happich
Gold nanomesh enables ultra-breathable skin electronics
While numerous electronic skins have been reported in literature, all aimed at creating highly flexible wearable electronics, most of them rely on thin but impermeable substrates such as biocompatible silicone or parylene films. When designed for health monitoring applications and in direct contact with the patient's skin, electronic patches that lack breathability can soon become uncomfortable to wear, creating a risk of skin inflammation if worn several days in a row.

In an experiment, the researchers created a touch sensor consisting of a simple nanomesh conductor array applied to a fingertip. The resistance between the nanomesh conductor strips decreases when a conductive object creates a shortcut. Such electrode arrays were also used to create a thermal and a pressure sensor, by applying a strip of positive temperature coefficient (PTC) polymer and pressure-sensitive rubber across them, respectively.

In another implementation, the nanomesh conductors were used as on-skin electrophysiology electrodes for electromyography (EMG) recording and yielded good signals comparable to today's gel electrodes.

The researchers also tested a gold nanomesh skin patch for one week to prove the breathability and the very low risk of skin-inflammation, recording electromyograms with minimal discomfort to the user.

University of Tokyo - www.ntech.t.u-tokyo.ac.jp

 

Related articles:

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Transparent capacitive touch sensor flexes, stretches and detects 3d shapes

Solution-based fabrication techniques for flex and stretch electronics


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