Recent advances in soft electronics have attracted great attention due in large to the potential applications in personalized,bio-integrated healthcare devices [1].The mechanical mismatch between conventional electronic/optoelectronic devices and soft human tissues/organs causes many challenges,such as the low signal to noise ratio of biosensors because of the incomplete integration of rigid devices with the body,inflammations and excessive immune responses of implanted stiff devices originated from frictions and foreign nature to biotic systems,and the huge discomfort and consequent stress to users in wearing/implanting these devices.