Self‐Assembled Asperities for Pressure‐Tunable Adhesion (Adv. Mater. 5/2023)

Abstract

Pressure‐Tunable Adhesives In article number 2207337, Chelsea Davis and co‐workers show that pressure‐tunable adhesives (PTAs) demonstrate variable adhesive separation forces depending on the application pressure used to form the interface. PTAs are formed by annealing a polymer film on a silicone surface so that it dewets, forming polygonal clusters. The large gray circle is the flat face of a cylindrical probe about to make contact with the PTA during a probe‐tack adhesion experiment.

Janus Dual Self‐Strengthening Structure of Bi2O3/Gd2O3 Nanofibrous Membranes for Superior X‐Ray Shielding

“…[ 17‐20 ] Moreover, the powdery nature of these X‐ray absorbers necessitates their combination with substrate material to prevent inhalation hazards; however, this leads to substantial absorber agglomeration and compromised mechanical properties. [ 21‐27 ] Strong bonding between interphasic absorbers ensures uniform and stable shielding performance of shielding materials and would not lead to functionality interference between these two components. Examples from nature, such as spider webs and silkworm cocoons, demonstrate that introducing a continuous fibrous structure can greatly enhance material utilization and resulting properties.…”