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The rise of MXene‐based materials with fascinating physical and chemical properties has attracted wide attention in the field of biomedicine, because it can be exploited to regulate a variety of biological processes. The biomedical applications of MXene are still in its infancy, nevertheless, the comprehensive evaluation of MXene's biosafety is desperately needed. In this review, the composition and...
Nanozymes, as innovative materials, have demonstrated remarkable potential in the field of electrochemical biosensors. This article provides an overview of the mechanisms and extensive practical applications of nanozymes in electrochemical biosensors. First, the definition and characteristics of nanozymes are introduced, emphasizing their significant role in constructing efficient sensors. Subsequently,...
Photocatalytic reduction of CO2 using solar energy is an effective means to achieve carbon neutrality. However, the photocatalytic efficiency still requires improvements. In this study, polyvinylidene fluoride (PVDF) ferroelectric/piezoelectric nanofiber membranes are prepared by electrospinning. Cadmium sulfide (CdS) nanosheets are assembled in situ on the surface of PVDF based on coordination between...
Regulating the electronic structure of active sites and monitoring the evolution of the active component is essential to improve the intrinsic activity of catalysts for electrochemical reactions. Herein, a highly efficient pre‐electrocatalyst of iron diselenide with rich Se vacancies achieved by phosphorus doping (denoted as P‐FeSe2) for oxygen evolution reaction (OER) is reported. Systematically...
In this work, a series of Mo‐containing polyoxometalates (POMs) modified separators to inhibit the growth of lithium dendrites, and thus improving the lifespan and safety of the cells is proposed. When the deposited lithium forms dendrites and touches the separator, the optimized Dawson‐type POM of (NH4)6[P2Mo18O62]·11H2O (P2Mo18) with the stronger oxidizability, acts like a “killer”, is more inclined...
Alkaline membrane water electrolysis is a promising production technology, and advanced electrocatalyst and membrane electrode design have always been the core technology. Herein, an ion‐exchange method and an environmentally friendly in situ green phosphating strategy are successively employed to fabricate Ru‐Ru2P heterogeneous nanoparticles by using hydroxyapatite (HAP) as a phosphorus source, which...
Smart Sensing
In article number 2206126, Jinbo Pang, Bergoi Ibarlucea, Weijia Zhou, Hong Liu, and co‐workers summarize the MXene based electronics, optics and electrochemistry for smart sensing. Classical examples can be found in this paper, including the biosensors for determining miRNA, field‐effect transistors for gas and chemical sensing, tactile sensors for electronic skins, neuromorphic memristors...
The Internet of Things era has promoted enormous research on sensors, communications, data fusion, and actuators. Among them, sensors are a prerequisite for acquiring the environmental information for delivering to an artificial data center to make decisions. The MXene‐based sensors have aroused tremendous interest because of their extraordinary performances. In this review, the electrical, electronic,...
Cardiovascular disease is a leading cause of disability and death worldwide. Although the survival rate of patients with heart diseases can be improved with contemporary pharmacological treatments and surgical procedures, none of these therapies provide a significant improvement in cardiac repair and regeneration. Stem cell‐based therapies are a promising approach for functional recovery of damaged...
Accurate control over the coordination circumstances of single‐atom catalysts (SACs) is decisive to their intrinsic activity. Here, two single‐site heterogeneous organometallic catalysts (SHOCs), Cp*Ir‒L/GDY (L = OH− and Cl−; Cp* = pentamethylcyclopentadienyl), with the fine‐tuned local coordination and electronic structure of Ir sites, are constructed by anchoring Cp*Ir complexes on graphdiyne (GDY)...
The optical superlattice structure derived from a periodic poling process endows ferroelectric crystals with tunable optical property regulation, which has become one of the most efficient strategies for fabricating high‐efficiency optical devices. Achieving a precise superlattice structure has been the main barrier for preparation of specific optical applications due to the unclear dynamics of domain...
Nonlinear‐Optical Devices
In article number 2202761, Hong Liu, Yuanhua Sang, Dongzhou Wang, and co‐workers develop a real‐time monitoring system for the in‐situ observation of periodic poling of lithium niobate to investigate ferroelectric domain reversal dynamics. An electrode configuration with multiholes is proposed to use the local electric field more efficiently and controllably, which could...
Piezoelectric nanomaterials open new avenues in driving green catalysis processes (e.g., H2 evolution from water) through harvesting mechanical energy, but their catalytic efficiency is still limited. The predicted enormous piezoelectricity for 2D SnSe, together with its high charge mobility and excellent flexibility, renders it an ideal candidate for stimulating piezocatalysis redox reactions. In...
Tissue Regeneration
In article number 2202485, Na Ren, Chao Liu, Hong Liu, and co‐workers report stem cell membrane‐encapsulated zeolitic imidazolate framework‐8 and take advantage of the innate targeting capacity towards stem cells to regulate osteogenic differentiation, and further promote bone repair.
Mesenchymal stem cells (MSCs) have been recognized as one of the most promising pharmaceutical multipotent cells, and a key step for their wide application is to safely and efficiently regulate their activities. Various methods have been proposed to regulate the directional differentiation of MSCs during tissue regeneration, such as nanoparticles and metal ions. Herein, nanoscale zeolitic imidazolate...
Neural stem cells (NSCs) therapy is promising for treating neurodegenerative disorders and neural injuries. However, the limited in vitro expansion, spontaneous differentiation, and decrease in stemness obstruct the acquisition of high quantities of NSCs, restricting the clinical application of cell‐based therapies and tissue engineering. This article reports a facile method of promoting NSCs expansion...
Polyetheretherketone (PEEK) is widely used in orthopedic and craniomaxillofacial surgeries as it exhibits excellent biocompatibility, mechanical property, and chemical stability. However, its clinical application is limited by the biological inertness of PEEK. Numerous efforts have been made to improve the bioactivity of this polymer over the years. However, modification methods that can not only...
PEEK Implants
In article number 2105589, Chunhui Sun, Chao Liu, Hong Liu, and co‐workers establish patterned nanorod arrays on a polyetheretherketone (PEEK) surface. The patterned nanorod arrays could effectively regulate the response of the filopodia of cells, so as to guide the change in cell morphology, and, thereby, could affect osteogenesis. This PEEK implant can be widely used to fabricate materials...
Conductive hydrogels can be prepared by incorporating various conductive materials into polymeric network hydrogels. In recent years, conductive hydrogels have been developed and applied in the field of strain sensors owing to their unique properties, such as electrical conductivity, mechanical properties, self‐healing, and anti‐freezing properties. These remarkable properties allow conductive hydrogel‐based...
Template methods are regarded as an important method for micro‐nano processing in the active layer of flexible tactile sensors. These template methods use physical/chemical processes to introduce micro‐nano structures on the active layer, which improves many properties including sensitivity, response/recovery time, and detection limit. However, since the processing process and applicable conditions...
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