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Cell engineering, soft robotics, and wearable electronics often desire soft materials that are easy to deform, self‐heal readily, and can relax stress rapidly. Hydrogels, a type of hydrophilic networks, are such kind of materials that can be made responsive to environmental stimuli. However, conventional hydrogels often suffer from poor stretchability and repairability. Here, hydrogels consisting...
Anti‐icing coatings on outdoor infrastructures and transportations inevitably suffer from surface injuries, especially in extreme weather events (e.g., freezing weather or acid rain). The coating surface damage can result in anti‐icing performance loss or even icing promotion. The development of anti‐icing coatings that enables self‐healing in extreme conditions is highly desired but still challenging...
Carbon Dot‐Based Hydrogels
The features of article number 2207048 by Xiaofeng Sun, Jin Zhou, Hongguang Li, and co‐workers include i) preparations of carbon dot (CD)‐based hydrogels, including CDs/polymers, CDs/low molecular weight gelators, CDs/graphene oxide, CDs/metal ions and derivatives of CD‐based hydrogels, ii) properties of CD‐based hydrogels, such as fluorescence, mechanical strength enhancement,...
Hydrogels have extremely high moisture content, which makes it very soft and excellently biocompatible. They have become an important soft material and have a wide range of applications in various fields such as biomedicine, bionic smart material, and electrochemistry. Carbon dot (CD)‐based hydrogels are based on carbon dots (CDs) and auxiliary substances, forming a gel material with comprehensive...
Self‐Boosting Vaccination
In article number 2207892, Xiang Gao, Bo Liu, Jing Gao, and co‐workers propose a pulsatile antigen released core‐shell microparticle namely LbL/MPs to achieve self‐boosting vaccination after single‐injection and to simulate multi‐injection immunization. LbL/MPs show multiple antigen release characteristics and can effectively induce immune response. The core‐shell microstructure...
Vaccination is among the most effective ways to prevent infectious diseases. Subunit vaccines are safe but usually require multiple booster shots, which may lead to immunity loss and economic consume. In this study, a self‐boosting vaccine is developed based on the pulsatile release of antigen from the core–shell microparticle after single‐injection immunization. Self‐healing technology applied to...
As the new generation of energy storage systems, the flexible battery can effectively broaden the application area and scope of energy storage devices. Flexibility and energy density are the two core evaluation parameters for the flexible battery. In this work, a flexible VS2 material (VS2@CF) is fabricated by growing the VS2 nanosheet arrays on carbon foam (CF) using a simple hydrothermal method...
Ultrastable Potassium‐Ion Storage
In article number 2300046, Hsing‐Yu Tuan and co‐workers propose a Cu3BiS3 anode material with a self‐healing mechanism for potassium ion storage devices, which shows an electrochemical reconstruction of phase reversibility and morphological reversibility.
The unique properties of self‐healing materials hold great potential in battery systems, which can exhibit excellent deformability and return to its original shape after cycling. Herein, a Cu3BiS3 anode material with self‐healing mechanisms is proposed for use in ultrastable potassium‐ion battery (PIB) and potassium‐ion hybrid capacitor (PIHC). Different from the binder design, Cu3BiS3 anode can exhibit...
It is a challenge to develop adhesives simultaneously capable of strong adhesion and efficient switchable ability. Herein, the authors report multifunctional switchable adhesives named Cu2+‐curcumin‐imidazole‐polyurethane (CIPUs:Cu2+) by introducing 1‐(3‐aminopropyl) imidazole and curcumin into polyurethane system crossed by Cu2+ forming dynamic metal‐ligand bonds. This CIPUs:Cu2+ has strong adhesion...
Fiber‐shaped conductors with high electrical conductivity, stretchability, and durability have attracted increasing attention due to their potential for integration into arbitrary wearable forms. However, these fiber conductors still suffer from low reliability and short life span, particularly in harsh environments. Herein, a conductive, environment‐tolerant, stretchable, and healable fiber conductor...
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