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Paper‐Based Electrical Respiration Sensor
Author(s) -
Güder Firat,
Ainla Alar,
Redston Julia,
Mosadegh Bobak,
Glavan Ana,
Martin T. J.,
Whitesides George M.
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201511805
Subject(s) - humidity , exhalation , cloud server , computer science , ventilation (architecture) , electronics , respiration , environmental science , breathing , moisture , materials science , electrical engineering , real time computing , engineering , cloud computing , mechanical engineering , meteorology , physics , botany , biology , composite material , radiology , operating system , medicine , anatomy
Current methods of monitoring breathing require cumbersome, inconvenient, and often expensive devices; this requirement sets practical limitations on the frequency and duration of measurements. This article describes a paper‐based moisture sensor that uses the hygroscopic character of paper (i.e. the ability of paper to adsorb water reversibly from the surrounding environment) to measure patterns and rate of respiration by converting the changes in humidity caused by cycles of inhalation and exhalation to electrical signals. The changing level of humidity that occurs in a cycle causes a corresponding change in the ionic conductivity of the sensor, which can be measured electrically. By combining the paper sensor with conventional electronics, data concerning respiration can be transmitted to a nearby smartphone or tablet computer for post‐processing, and subsequently to a cloud server. This means of sensing provides a new, practical method of recording and analyzing patterns of breathing.

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