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23 avril 2021

par l’Université d’Osaka

Des scientifiques de l’Université d’Osaka, en coopération avec Joanneum Research (Weiz, Austria), ont mis au point des correctifs de surveillance de la santé sans fil qui utilisent des nanogénérateurs piézoélectriques intégrés pour s’alimenter avec l’énergie biomécanique récoltée. Ce travail peut conduire à de nouveaux capteurs de santé autonomes ainsi qu’à des appareils électroniques portables sans batterie

As wearable technology and smart sensors become more and more popular, the problem of the power supply of all these devices is becoming more and more relevant While the energy requirements of each component may be modest, the need for wires or even batteries becomes cumbersome and impractical This is why new methods of energy recovery are needed., the ability for integrated health monitors to use ambient motion to power and activate sensors will help accelerate their adoption in physician offices.

Now, an international team of Japanese and Austrian researchers invented new ultra-flexible patches with a ferroelectric polymer that can not only detect a patient's pulse and blood pressure, but also feed on normal movements. The key was to start with a substrate only a micron thick Using a strong electric field, ferroelectric crystal domains in a copolymer have been aligned so that the sample has a large electric dipole moment Based on the piezoelectric effect, which is very effective in converting natural motion into small electrical voltages, the device responds quickly to changes in stress or pressure These voltages can be transduced either into signals for medical sensors, either to directly harvest energy «Our e-health patches can be used for screening for lifestyle-related illnesses such as heart problems, signs of stress and sleep apnea», says Andreas Petritz, first author.

The authors believe that multi-layered patches can harvest up to 200 millijoules par jour à partir du mouvement biomécanique lorsqu’ils sont portés sur les articulations, comme les genoux ou les coudes Cela suffit pour surveiller les paramètres cardiovasculaires plusieurs fois par jour Et les patchs sont si fins qu’ils sont à peine perceptibles, ce qui rend un mal nécessaire pour de nombreux patientsla surveillance quotidienne de la santé – less unpleasant

“We hope our results will help in the development of other sheet-like sensor systems that can perform accurate biomonitoring when attached to the skin surface.”, says lead author Tsuyoshi Sekitani. Additional modules allow other functionalities, such as wireless communication with a smartphone or computer

The article, “Dispositif de récupération d’énergie imperceptible et capteur biomédical basé sur des transducteurs ferroélectriques ultraflexibles et des diodes organiques”, a été publié dans Nature Communications

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Research, cybersanté, blood pressure

News – FR – Des chercheurs développent des patchs de cybersanté ultra-minces et auto-alimentés qui peuvent surveiller le pouls et la tension artérielle d’un utilisateur
Associated title :
Des chercheurs développent des correctifs e-santé ultra-minces et auto-alimentés qui peuvent surveiller le pouls et la pression artérielle d’un utilisateur
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