Abstract
Integration of flexible electronics into the living system is expected for advancing medical diagnostics and therapeutics. Such
devices should be conformable to the physical and mechanical environment of our body, in which acquired biosignals should
be wirelessly transmitted to external device. In this regard, we envisage ultra-flexible wearable or implantable devices based on
the polymer nanosheet technology. The polymer nanosheet shows tens- to hundreds-of-nanometer thickness close to the scale of
biomembranes, in which various types of polymers （e.g., biodegradable polymers, conductive polymers, and elastomers） are formed
into the ultra-thin structure. The free-standing nanosheet showed flexible and adhesive properties derived from ultra-small flexural
rigidity. In this study, the development of nanosheet （or thin film）-based electronics is introduced by combining nanosheet and
printing technologies. The nanosheet electronics has been utilized as tissue-interfaced electronics to direct biosignals or functions for
advanced medicine and health-care applications.
