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Doping atomically thick nanosheets is a great challenge due to the self‐purification effect that drives the precipitation of dopants. Here, a breakthrough is made to dope Mn atoms substitutionally into MoS2 nanosheets in a sulfur‐rich supercritical hydrothermal reaction environment, where the formation energy of Mn substituting for Mo sites in MoS2 is significantly reduced to overcome the self‐purification...
It is of great importance to exploit electrode materials for sodium‐ion batteries (SIBs) with low cost, long life, and high‐rate capability. However, achieving quick charge and high power density is still a major challenge for most SIBs electrodes because of the sluggish sodiation kinetics. Herein, uniform and mesoporous NiS2 nanospheres are synthesized via a facile one‐step polyvinylpyrrolidone assisted...
A nanohybrid based on porous and hollow interior structured LaNiO3 stabilized nitrogen and sulfur codoped graphene (LaNiO3/N,S‐Gr) is successfully synthesized for the first time. Such a nanohybrid as an electrocatalyst shows high catalytic activity for oxygen reduction reaction (ORR) in O2‐saturated 0.1 m KOH media. In addition, it demonstrates a comparable catalytic activity, longer working stability,...
Efficiently detecting mechanical deformations within materials is critical in a wide range of devices, from micro‐electromechanical systems to larger structures in the aerospace industry. This communication reports the fabrication of new mechanochromic micrometer‐size capsules enabling the detection of strains. These microcapsules are synthesized using an emulsification approach. They are made of...
A novel CdMoO4–ZnO composite film is prepared by spin‐coating CdMoO4 microplates on ZnO film and is constructed as a heterojunction photodetector (PD). With an optimized loading amount of CdMoO4 microplates, this composite film PD achieves a ≈18‐fold higher responsivity than pure ZnO film PD at 5 V bias under 350 nm (0.15 mW cm−2) UV light illumination, and its decay time shortens to half of the original...
Materials that can couple electrical and mechanical properties constitute a key element of smart actuators, energy harvesters, or many sensing devices. Within this class, functional oxides display specific mesoscale responses which often result in great sensitivity to small external stimuli. Here, a novel combination of molecular beam epitaxy and a water‐based chemical‐solution method is used for...
In article number 1701804, Huseyin Burak Eral and co‐workers report biodegradable hydrogel microparticles that provide information on authenticity and potential deterioration of tagged food or pharmaceutical formulations. The authenticity code and the sensor information are read with a standard microscope which enables verification of the product safety directly prior to consumption to protect consumers...
High‐quality and large‐area molybdenum disulfide (MoS2) thin film is highly desirable for applications in large‐area electronics. However, there remains a challenge in attaining MoS2 film of reasonable crystallinity due to the absence of appropriate choice and control of precursors, as well as choice of suitable growth substrates. Herein, a novel and facile route is reported for synthesizing few‐layered...
Gold–polymer hybrid nanoparticles attract wide interest as building blocks for the engineering of photonic materials and plasmonic (active) metamaterials with unique optical properties. In particular, the coupling of the localized surface plasmon resonances of individual metal nanostructures in the presence of nanometric gaps can generate highly enhanced and confined electromagnetic fields, which...
Magnetic‐luminescent nanocomposites have multiple uses including multimodal imaging, magnetic targeted drug delivery, and cancer imaging‐guided therapies. In this work, dumbbell‐like MnFe2O4–NaYF4 Janus nanoparticles are synthesized via a two‐step thermolysis approach. These synthesized nanoparticles exhibit stability in aqueous solutions and very low cytotoxicity after poly(acryl amide) modification...
Phosphorus compounds, such as metal phosphides and phosphates have shown excellent performances and great potential in electrochemical energy storage, which are demonstrated by research works published in recent years. Some of these metal phosphides and phosphates and their hybrids compare favorably with transition metal oxides/hydroxides, which have been studied extensively as a class of electrode...
Ultraviolet (UV)‐resonant metals (e.g., aluminum) typically have low melting point to cause a fabrication difficulty in helical sculpture to generate plasmons with chiroptical activity in the UV region. In this work, using glancing angle deposition (GLAD), two new methods are devised to generate crystalline chiral Al nanostructures that have stable chiroptical response in the UV–visible region originating...
This study demonstrates that the application of an external electrical potential to a phenyl‐sulfonic functionalized graphene (SG)/water suspension distinctly enhances its electrical conductivity via the structural transition from isolated clusters to a 3D SG network. Microstructural and alternating current impedance spectroscopy studies indicate that the surface charge plays an important role in...
Cuprous oxide (Cu2O) photocathode is reported as a promising candidate for photoelectrochemical water splitting. The p‐type Cu2O usually forms a Schottky junction with the conductive substrate due to its large work function, which blocks the collection of photogenerated holes. NiO is considered as one of the most promising hole transfer layers (HTL) for its high hole mobility, good stability, and...
In article number 1701112, Zhifeng Huang and co‐workers report chiral aluminum nanostructures with strong, stable chiroptical activity in the UV‐visible region that are fabricated by glancing angle physical vapor deposition. The chiroptical activity originates from the hidden helicity or helicity duplication from the chiral host, and the latter can be generally adapted to diverse plasmonic metals...
Novel structured composite microspheres of metal oxide and nitrogen‐doped graphitic carbon (NGC) have been developed as efficient anode materials for lithium‐ion batteries. A new strategy is first applied to a one‐pot preparation of composite (FeOx‐NGC/Y) microspheres via spray pyrolysis. The FeOx‐NGC/Y composite microspheres have a yolk–shell structure based on the iron oxide material. The void space...
Rapid improvement of wearable electronics stimulates the demands for the matched functional devices and energy storage devices. Meanwhile, wearable microsystem requires every parts possessing high compressibility to accommodate large‐scale mechanical deformations and complex conditions. In this work, a general carbon nanotube–polydimethylsiloxane (CNT–PDMS) sponge electrode is fabricated as the elementary...
In an era of globalized trade relations where food and pharmaceutical products cross borders effortlessly, consumers face counterfeit and deteriorated products at elevated rates. This paper presents multifunctional, biodegradable hydrogel microparticles that can provide information on the authenticity and the potential deterioration of the tagged food or pharmaceutical formulations. These microparticles...
Reactive sulfur species (RSS) are a family of crucial biosignals for regulating cell processes. Among these, hydrogen polysulfide (H2Sn, n ≥ 2) is a hallmark of tumor suppressor activation and regarded as the actual regulator to mediate sulfur‐related biology. However, high effective recognition of intracellular H2Sn is insurmountable due to its extremely low concentration and the disturbance of RSS...
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