Abstract
Recent technological innovations, such as material printing techniques and surface functionalization, have significantly accelerated the development of new free-form sensors for next-generation flexible, wearable, and three-dimensional electronic devices. Ceramic film sensors, in particular, are in high demand for the production of reliable flexible devices. Various ceramic films can now be formed on plastic substrates through the development of low temperature fabrication processes for ceramic films, such as photocrystallization and transferring methods. Among flexible sensors, strain sensors for precise motion detection and photodetectors for biomonitoring have seen the most research development, but other fundamental sensors for temperature and humidity have also begun to grow. Recently, flexible gas and electrochemical sensors have attracted a lot of attention from a new real-time monitoring application that uses human breath and perspiration to accurately diagnose presymptomatic states. The development of a low-temperature fabrication process of ceramic film sensors and related components will complete the chemically stable and reliable free-form sensing devices by satisfying the demands that can only be addressed by flexible metal and organic components.
Highlights
A material’s flexibility has recently gained significance in the development of nextgeneration electronic devices [1]
We recognize that there is a high demand for efficient techniques for dynamic and precise stress/strain imaging on large-scale structures
Recent technological innovations such as material printing techniques and surface functionalization have strongly boosted the development of new free-form sensors for next-generation, flexible, wearable and 3D electronic devices
Summary
A material’s flexibility has recently gained significance in the development of nextgeneration electronic devices [1]. Recent advances in the manufacturing process have enabled devices to be designed with a high degree of form freedom. Wearable devices as sensor-integrated systems are primarily used in healthcare management to enhance a healthy life expectancy and are highlighted by real-time patient monitoring for medical care [2–7]. Since 2000, there has been an increase in the number of publications on this topic, which has increased further since 2014 This is related to the release of wearable smart devices capable of real-time vital monitoring with user-friendly management software, such as the first-generation “Apple watch” (Apple Inc., Cupertino, CA, USA) in 2013 and the “Fitbit Force” (Fitbit Inc., San Francisco, CA, USA) in 2014.
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