Bionic Luminescent Skin as Ultrasensitive Temperature‐Acoustic Sensor for Underwater Information Perception and Transmission

Abstract Bioinspired artificial luminescent skin (L‐skin) integrated with multiple sensing functions significantly promotes the development of smart devices. It is considerably challenging to realize underwater sensing technologies. Here, a sharkskin‐inspired Eu@HOF‐TJ‐1@TA L‐skin ( 1 ) is prepared for both temperature and sound sensing. 1 is an ultrathin and flexible temperature sensor, in 298.15–358.15 K, exhibiting ultrahigh maximum relative sensitivity (97.669% K −1 ) and low minimum uncertainty (0.000 952 K). The temperature response mechanism is analyzed deeply. As a waterproofing acoustic sensor, 1 can monitor sound in both air and water with the greatest sound response frequencies of 400 and 300 Hz in air and water, respectively. The maximum sensitivities of 1 in air and water are 6 593 765.2 and 1 346 124.5 cps Pa −1 , respectively. The response times of 1 in air and water are as fast as 20 and 10 ms. The sound response processes of 1 in air and water are simulated by finite element simulation. Moreover, by using sharkskin‐inspired 1 , the actual water temperature can be monitored, and a series of water sound information can be recognized by using an artificial neural network. This work proposes a sharkskin‐inspired L‐skin for temperature and acoustic sensing and promotes the development of underwater sensing technology with high performances.