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Biomimetic flexible electronics for E‐skin have received increasing attention, due to their ability to sense various movements. However, the development of smart skin‐mimic material remains a challenge. Here, a simple and effective approach is reported to fabricate super‐tough, stretchable, and self‐healing conductive hydrogel consisting of polyvinyl alcohol (PVA), Ti3C2Tx MXene nanosheets, and polypyrrole...
In article number 1904290, Gang Zhao, Yuanjin Zhao, and co‐workers propose a novel cryopreservation method for β cells by combining cold‐responsive nanocapsules and alginate hydrogel encapsulation. Great cell viability is obtained without using any toxic cryoprotectant and the cryopreserved β cell‐laden hydrogels can be transplanted into diabetic rats for blood glucose regulation.
Islet transplantation has been one promising strategy in diabetes treatment, which can maintain patient's insulin level long‐term and avoid periodical insulin injections. However, donor shortage and temporal mismatch between donors and recipients has limited its widespread use. Therefore, searching for islet substitutes and developing efficient cryopreservation technology (providing potential islet...
Cryopreservation is essential to effectively extend the shelf life of delicate biomaterials while maintaining proper levels of cell functions. Cryopreservation requires a cryoprotective agent (CPA) to suppress intracellular ice formation during freezing, but it must be removed prior to clinical use due to its toxicity. Conventional multistep CPA loading and unloading approaches are time consuming,...
In recent years, 2D materials are attracting increased attention because of their excellent properties. In this paper, new 2D carbon nitride (CN) organic materials are successfully prepared on the basis of the organic synthesis theory, and the thickness is about 1.5 nm. This new 2D CN organic material further strengthens the 2D materials family. Meanwhile, their synthetic mechanism is theoretically...
Geometric and mechanical characterizations of hydrogel materials at the microscale are attracting increasing attention due to their importance in tissue engineering, regenerative medicine, and drug delivery applications. Contemporary approaches for measuring the these properties of hydrogel microbeads suffer from low‐throughput, complex system configuration, and measurement inaccuracy. In this work,...
Transparent microtubes can function as unique cell culture scaffolds, because the tubular 3D microenvironment they provide is very similar to the narrow space of capillaries in vivo. However, how to realize the fabrication of microtube‐arrays with variable cross‐section dynamically remains challenging. Here, a dynamic holographic processing method for producing high aspect ratio (≈20) microtubes with...
Based on the phase transformation of phosphorus and Gibbs free energy theory, a new mild method to fabricate black phosphorus nanosheets from their red phosphorus microsphere counterparts is proposed. Interestingly, the as‐prepared black phosphorus nanosheets, as a kind of novel metal‐free photocatalyst, exhibit excellent photocatalytic H2 production performance owing to their intrinsic layered polycrystalline...
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