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Flexible, Paper-Thin Heart Monitor for Detailed Diagnostics

Zhenan Bao, a professor of chemical engineering at Stanford University, has developed a flexible, skin-like heart monitor that is sensitive enough to detect stiff arteries and cardiovascular problems. The sensor is worn under an adhesive bandage on the wrist. To make the monitor so small and sensitive, Bao's team used a thin middle layer of rubber covered with tiny pyramid bumps. Each mold-made pyramid is only a few microns in diameter. When pressure is put on the device, the pyramids deform slightly, changing the size of the gap between the two halves of the device. This change in separation causes a measurable change in the electromagnetic field and the current flow in the device.

Topics:
Detectors Diagnostics Electronics & Computers Materials Measuring Instruments Medical Plastics Semiconductors & ICs Sensors Test & Measurement

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    Transcript

    00:00:01 [Music] Stanford University this is um a prototype for a flexible highly sensitive um pressure sensor U which can be used for measuring the pulse on a human wrist very accurately it's made of um on a on a plastic substrate and um composed of um organic semiconductor as active materials in normal

    00:00:33 transistors they use a rigid uh dialectric layer um but in our case we use a compressible rubber previously we didn't have uh semiconducting material uh that is uh solution processable and uh have high conductivity at the same time uh but more recently we developed such kind of polymer semiconductor uh so that was quite crucial we hope to towards the future to uh incorporate

    00:01:03 these kinds of bandage with wireless uh technology uh so that the uh patient can wear this kind of bandage uh without uh uh interrupting their uh everyday life which can be used for example in um during surgery where the doctors need to trace um the pulse continuously and it may be also for example doing sports activities so it can track your your Ps we're developing devices that do not

    00:01:33 exist previously uh and these devices utilize the advantages of uh plastic materials and organic materials we are really excited to push the potential future applications of organic semiconductors and polymer semiconductors for more please visit us at stanford.edu