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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...
The exploring of economical, high‐efficiency, and stable bifunctional catalysts for hydrogen evolution and oxygen evolution reactions (HER/OER) is highly imperative for the development of electrolytic water. Herein, a 3D cross‐linked carbon nanotube supported oxygen vacancy (Vo)‐rich N‐NiMoO4/Ni heterostructure bifunctional water splitting catalyst (N‐NiMoO4/Ni/CNTs) is synthesized by hydrothermal‐H...
Versatile electrocatalysis at higher current densities for natural seawater splitting to produce hydrogen demands active and robust catalysts to overcome the severe chloride corrosion, competing chlorine evolution, and catalyst poisoning. Hereto, the core‐shell‐structured heterostructures composed of amorphous NiFe hydroxide layer capped Ni3S2 nanopyramids which are directly grown on nickel foam skeleton...
Early Diagnosis of Cancers
In article 2205445, Shangquan Wu, Qingchuan Zhang, and co‐workers develop an ultra‐sensitive nanomechanical sensor, which uses a magnetic‐driven microcantilever array to selectively detect oncogenic exosomes. The magnetic force produces a far greater deflection of microcantilever than that produced by the intermolecular interaction force, even in the presence of very low...
Exosomes are a class of nanoscale vesicles secreted by cells, which contain abundant information closely related to parental cells. The ultrasensitive detection of cancer‐derived exosomes is highly significant for early non‐invasive diagnosis of cancer. Here, an ultrasensitive nanomechanical sensor is reported, which uses a magnetic‐driven microcantilever array to selectively detect oncogenic exosomes...
Heterogeneous electrocatalysis typically depends on the surface electronic states of active sites. Modulating the surface charge state of an electrocatalysts can be employed to improve performance. Among all the investigated materials, nickel (Ni)‐based catalysts are the only non‐noble‐metal‐based alternatives for both hydrogen oxidation and evolution reactions (HOR and HER) in alkaline electrolyte,...
Sodium‐ion batteries (SIBs) are considered as a promising large‐scale energy storage system owing to the abundant and low‐cost sodium resources. However, their practical application still needs to overcome some problems like slow redox kinetics and poor capacity retention rate. Here, a high‐performance ZnSe/carbon fibers (ZnSe‐CFs) anode is demonstrated with high electrons/Na+ transport efficiency...
Ferroptosis is a form of regulated cell death which can not only kill tumor cells but also enhance immunogenicity of tumor cells, and it is evidenced to be involved in a variety of tumor treatments, especially in cancer immunotherapy. Tumor cell‐derived exosomes are reported to influence the progression and metastasis process of tumors. In the process of ferroptosis, exosomes are also demonstrated...
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