MOF based Flexible, Low-Cost Chemiresistive Device as a Respiration Sensor for Sleep Apnea Diagnostics
The monitoring of respiratory disorders require breath sensors that are fast, robust, convenient to use and that can function under real conditions. A MOF based flexible sensor is reported for the first time for breath sensing application. The properties of highly porous HKUST-1 MOF and the conducting MoS2 material have been combined to fabricate an electronic sensor on a flexible paper support for studying sleep apnea problem. Extensive breath sensing experiments have been performed and interestingly the fabricated sensor is efficient in detecting various kinds of breaths such as deep, fast, slow and hydrated breath, etc. The MOF breath sensor shows fast response time of just ~ 0.38 sec and excellent stability with no decline in its performance even after a month. A plausible mechanism has been proposed and a smartphone based prototype has been prepared to demonstrate the real time application of the hybrid device. This work demonstrates great potential for application of MOFs in healthcare with special focus on breath sensing and sleep apnea diagnosis.