University of Tokyo invented heartbeat detection sensor

Professor Takao Someya from the Graduate School of Engineering at Tokyo University and his team created an ultra-thin electronic conductor material.

This flexible electrode made of breathable gold-plated filaments can be used to develop devices that monitor human health for long periods of time without being implanted in the body.

At present, the medical devices used for monitoring heartbeat and other health signals are mainly attached to the skin with light and highly elastic rubber materials to ensure the accuracy and sensitivity of the measurement results.

Although these electrode patches fit well to the skin, airtight rubber blocks the sweat of the pores and, in severe cases, may cause inflammation of the skin.

"In research in the field of medicine and sports, there is a particular need for continuous monitoring of heart rate or other body signals for more than a year to achieve certain results," said Professor Takao Someya. "To better solve the problem of airtight materials, we use A new nanomaterial consisting of polyvinyl alcohol (PVA) fibers and electroconductive filaments coated with gold (Au) layer. "

The team tried to knit these two materials into a mesh structure on the nanometer scale, successfully creating a lightweight and breathable electrode material. After fitting on the human skin, it feels like a golden tattoo.

By spraying a small amount of water to dissolve water-soluble polyvinyl alcohol, gold-plated conductive material perfectly fit the skin surface or fingerprints, due to the use of network structure, and will not affect the permeability of the sweat pores.

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