| 초록 |
Human skin is the largest organ of our body. It provides a remarkable network of highly sensitive diverse sensors, such as those for tactile sensing, health monitoring, and temperature sensing, that are able to convert mechanical stimuli into physiological signals, which are then interpreted by the brain. Because skin has numerous potential applications, scientists are now exploring the field of electronic skin (e-skin), dreaming to mimic the properties of skin and create novel applications. Besides human skin, the animal and insect skins exhibit many amazing functions. For example, chameleon skin is famous for its color-changing abilities. A chameleon can control its pigment cells and change its coloration for purposes of camouflage, temperature maintenance, and communication, which has inspired scientists to develop biomimetic applications through various approaches. However, previous studies only demonstrated this color changing ability without integrating the most crucial function of e-skin―tactile sensing. Herein, we present a user-interactive and color-tunable e-skin that enables not only detecting but also distinguishing various pressure forces through real-time absorption change. In addition, the different pressure forces accompanied with corresponding absorption bands in the system demonstrate that skin color can be controlled through applying various pressure forces; on the other hand, the controllable skin color change can be utilized to identify various pressures. Stretchable and ultrathin carbon-based electrochromic devices, and the tunable resistance and tunable switching range of pressure sensors were compliantly integrated in this study. This is the first demonstration of camouflaging e-skin with tactile sensing control. The e-skin integrated color-tunable properties and a tactile sensing ability that incorporates diverse functionalities, and we believe that it will meet diverse applications in health monitoring, interactive and wearable devices, military applications, artificial prosthetics, and smart robots. |
