Convenient and effective measurements of oxygen concentration in the air is critical in many fields such as environment and industrial hygiene. In order to meet these increasing demands, various types of oxygen sensors have been developed. However, many conventional sensors operate at very high temperature and have complex structures, thus they are difficult to be used in wearable devices. Herein, we report a novel flexible sensor that has a simple layered structure and can monitor the oxygen contents at room temperature. The sensing material consisted of nano-TiO<sub>2</sub>, which can reacts with oxygen at ambient condition and shows multi-changes in the lightness of color and the electrical resistance. In addition, the tailored design of substrate, electrode and electrolyte of the sensor has allowed an effective collection of sensing signals even in flexible conditions. The characteristics of the sensor were thoroughly investigated by using SEM, XRD and DFT techniques.

Development of flexible electrochromic oxygen sensor operating at room temperature

2019 Fall National Meeting

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