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. 2020 Apr 2;10(4):664. doi: 10.3390/nano10040664

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Real-time detection of different electrical signals using the NCB-coated PDMS pressure sensor: (a) The response of relative current changes caused by rapid whirling of the wrist. (b) The current signal for detecting different strengths of gas generated from the mouth. (c) Photograph of a sensor mounted on the wrist for pulse detection. (d,e) A wrist pulse waveform and a single pulse waveform recorded by the NCB sensor. (f) An optical image of the NCB-coated PDMS sensor attached to the neck for arterial pulse waves’ detection. (g) Neck pulse waveform of the test sensor and (h) a single pulse waveform.

Real-time detection of different electrical signals using the NCB-coated PDMS pressure sensor: (a) The response of relative current changes caused by rapid whirling of the wrist. (b) The current signal for detecting different strengths of gas generated from the mouth. (c) Photograph of a sensor mounted on the wrist for pulse detection. (d,e) A wrist pulse waveform and a single pulse waveform recorded by the NCB sensor. (f) An optical image of the NCB-coated PDMS sensor attached to the neck for arterial pulse waves’ detection. (g) Neck pulse waveform of the test sensor and (h) a single pulse waveform.