Hydrogels are polymer networks infiltrated with water. Many biological hydrogels in animal
bodies such as muscles, heart valves, cartilages, and tendons possess extreme mechanical …

Acoustic metamaterials have been widely investigated over the past few decades and have
realized acoustic parameters that are not achievable using conventional materials. After …

Emerging ultrasonic bioelectronics (UBEs) with wearable, implantable or highly integrated
forms enable continuous health monitoring and on-demand medical therapy at the point of …

By using a structured tungsten-polyurethane composite that is impedance matched to water
while simultaneously having a much slower longitudinal sound speed, we have theoretically …

Hydrogel-based soft machines are promising in diverse applications, such as biomedical
electronics and soft robotics. However, current fabrication techniques generally struggle to …

Perfect wave transmission across dissimilar media is critical in wave devices. However, the
existing impedance matching theory allows perfect wave transmission only in special cases …

The design of soft robots capable of navigation underwater has received tremendous
research interest due to the robots' versatile applications in marine explorations. Inspired by …

Underwater sound-absorbing metasurfaces are critical for applications like underwater
acoustic stealth and noise control. However, achieving both broadband and low-frequency …

Efficient acoustic communication across the water–air interface has always been expected
in the field of ocean exploration. However, the existing research works are mainly …

Efficiently receiving underwater sound remotely from air is a long‐standing challenge in
acoustics hindered by the large impedance mismatch at the water–air interface. Here, a …