Flexible and Stretchable Devices

DOI: 10.1002/adma.201601422 Wearable electronics not only enrich daily lives by providing enhanced smart functions, but also provide health information by monitoring body conditions. For example, compliant wearable sensor systems have the potential to better interface with human skin, thus improving the sensitivity of detection of health indicators. Conferring wearability to electronics can also dramatically enhance their applications for emerging Internet of Things (IoT) applications such that people, processes, data, and devices are integrated and connected to improve the quality of life. Moreover, advances in wireless technologies, low-power electronics, and in the domain of digital health are driving innovations in wearable devices at a tremendous pace. Due to these advantages, it is predicted that the wearable device market will reach US$ 20.6 billion in 2018. To facilitate the growth of this emerging fi eld, it is critical that fl exible and stretchable devices that can accommodate strain and maintain high performance under deformation are developed.