Thermoresponsive and Strain-Sensitive Hydrogels with Inscribable Transparency-Based Dynamic Memory Behaviors

, utilizing which the hydrogels achieve inscribed programmed dynamic memory for information memorizing-forgetting-recalling based on a pH-engraved dynamic transparency evolution of the hydrogel in response to temperature changes. These intelligent hydrogels can not only be used as efficient near-infrared (NIR) light-controlled drug release carriers to realize on-demand drug release, but also serve as a soft sensor to recognize different body postures and movement behaviors with high strain sensitivity (gauge factor, GF = 5.98), broad working strain (5-500%), rapid response (139 ms), and excellent sensing reliability (≈1000 cycles at 50% strain).