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Tin (Sn)‐based perovskites are being investigated in many optoelectronic applications given their similar valence electron configuration to that of lead‐based perovskites and the potential environmental hazards of lead‐based perovskites. However, the formation of high‐quality Sn‐based perovskite films faces several challenges, mainly due to the easy oxidation of Sn2+ to Sn4+ and the fast crystallization...
Topical antibiotics can be utilized to treat periodontitis, while their delivery stratagems with controlled release and long‐lasting bactericidal inhibition are yet challenging. Herein, inspired by the defensive behavior of cuttlefish expelling ink, this work develops innovative thermal‐responsive melanin‐integrated porous microparticles (MPs) through microfluidic synthesis for periodontitis treatment...
High‐quality perovskite absorption layer is the fundamental basis for efficient and stable perovskite solar cells (PSCs). Due to the ionic nature of perovskite components, plentiful charged defects and suspension bonds remain on the surface of perovskite grains after continuous high‐temperature annealing. Here, the complex initiated by the introduction of a multifunctional imidazolidinyl urea (IU)...
Efficient bifunctional hydrogen electrocatalysis, encompassing both hydrogen evolution reaction (HER) and hydrogen oxidation reaction (HOR), is of paramount significance in advancing hydrogen‐based societies. While non‐precious‐metal‐based catalysts, particularly those based on nickel (Ni), are essential for alkaline HER/HOR, their intrinsic catalytic activity often falls short of expectations. Herein,...
The long‐term inflammatory microenvironment is one of the main obstacles to inhibit acute spinal cord injury (SCI) repair. The natural adipose tissue‐derived extracellular matrix hydrogel shows effective anti‐inflammatory regulation because of its unique protein components. However, the rapid degradation rate and removal of functional proteins during the decellularization process impair the lasting...
Polymer Field‐Effect Transistors
In article number 2306010, Jian Pei and co‐workers demonstrate ideal and environmentally stable charge transport in n‐type polymer field‐effect transistors. The fabricated transistors exhibit high electron mobility and near 100% reliability factors and remain robust after being stored in air for more than 300 days and immersed in water or acetone.
Realizing ideal charge transport in field‐effect transistors (FETs) of conjugated polymers is crucial for evaluating device performance, such as carrier mobility and practical applications of conjugated polymers. However, the current FETs using conjugated polymers as the active layers generally show certain non‐ideal transport characteristics and poor stability. Here, ideal charge transport of n‐type...
The interaction between catalyst and support plays an important role in electrocatalytic hydrogen evolution (HER), which may explain the improvement in performance by phase transition or structural remodeling. However, the intrinsic behavior of these catalysts (dynamic evolution of the interface under bias, structural/morphological transformation, stability) has not been clearly monitored, while the...
γ‐valerolactone (GVL) is a key value‐added chemical catalytically produced from levulinic acid (LA), an important biomass derivative platform chemical. Here an ultra‐efficient 3D Ru catalyst generated by in situ reduction of RuZnOx nanoboxes is reported; the catalyst features a well‐defined structure of highly dispersed in situ oxide‐derived Ru (IOD‐Ru) clusters (≈1 nm in size) spatially confined...
Considering the direct influence of substrate surface nature on perovskite (PVK) film growth, buried interfacial engineering is crucial to obtain ideal perovskite solar cells (PSCs). Herein, 1‐(3‐aminopropyl)‐imidazole (API) is introduced at polytriarylamine (PTAA)/PVK interface to modulate the bottom property of PVK. First, the introduction of API improves the growth of PVK grains and reduces the...
High‐performance optoelectronic nonvolatile memory is promising candidate for next‐generation information memory devices. Here, a floating‐gate memory is constructed based on van der Waals heterostructure, which exhibits a large storage window ratio (≈75.5%) and an extremely high on/off ratio (107), as well as an ultrafast electrical writing/erasing speed (40 ns). The enhanced performance enables...
Responsive structural colors from artificially engineered micro/nanostructures are critical to the development of anti‐counterfeiting, optical encryption, and intelligent display. Herein, the responsive structural color of hydrogel micropillar array is demonstrated under the external stimulus of ethanol vapor. Micropillar arrays with full color are fabricated via femtosecond laser direct writing by...
Amyloid fibrils—nanoscale fibrillar aggregates with high levels of order—are pathogenic in some today incurable human diseases; however, there are also many physiologically functioning amyloids in nature. The process of amyloid formation is typically nucleation‐elongation‐dependent, as exemplified by the pathogenic amyloid‐β peptide (Aβ) that is associated with Alzheimer's disease. Spider silk, one...
Spider Silk Proteins
Both spider silk protein and Alzheimer's disease associated amyloid‐β peptide can assemble into silk‐like fibers that consist of nanofibrils. Spider silk proteins' unique primary structures have evolved to allow functional amyloid‐like properties and direct their fibrillization pathways to avoid formation of cytotoxic intermediates. More details can be found in article number...
The vigorous nanomedicine offers significant possibilities for effective therapeutics of various diseases, and nanovesicles (NVs) represented by artificial liposomes and natural exosomes and cytomembranes especially show great potential. However, their complex interactions with cells, particularly the heterogeneous extracellular adsorptions, are difficult to analyze spatiotemporally due to the transient...
Electrochemical reduction of CO2 (CO2RR) into value‐added products is a promising strategy to reduce energy consumption and solve environmental issues. Formic acid/formate is one of the high‐value, easy‐to‐collect, and economically viable products. Herein, the reconstructed Bi2O2CO3 nanosheets (BOCR NSs) are synthesized by an in situ electrochemical anion exchange strategy from Bi2O2SO4 as a pre‐catalyst...
With the development of bionics as well as materials science, intelligent soft actuators have shown promising applications in many fields such as soft robotics, sensing, and remote manipulation. Microfabrication technologies have enabled the reduction of the size of responsive soft actuators to the micron level. However, it is still challenging to construct microscale actuators capable of responding...
Social biotic colonies often perform intricate tasks by interindividual communication and cooperation. Inspired by these biotic behaviors, a DNA nanodevice community is proposed as a universal and scalable platform. The modular nanodevice as the infrastructure of platform contains a DNA origami triangular prism framework and a hairpin‐swing arm machinery core. By coding and decoding a signal domain...
Conventional two‐dimensional electron gas (2DEG) typically occurs at the interface of semiconductor heterostructures and noble metal surfaces, but it is scarcely observed in individual 2D semiconductors. In this study, few‐layer gallium selenide (GaSe) grown on highly ordered pyrolytic graphite (HOPG) is demonstrated using scanning tunneling microscopy and spectroscopy (STM/STS), revealing that the...
The “shuttle effect” and slow conversion kinetics of lithium polysulfides (LiPSs) are stumbling block for high‐energy‐density lithium–sulfur batteries (LSBs), which can be effectively evaded by advanced catalytic materials. Transition metal borides possess binary LiPSs interactions sites, aggrandizing the density of chemical anchoring sites. Herein, a novel core–shelled heterostructure consisting...
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