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Conventional triboelectric nanogenerators (TENGs) face challenges pertaining to low output current density at low working frequencies and high internal impedance. While strategies, such as surface modification to enhance surface charge density, permittivity regulation of materials, and circuit management, have partially mitigated these issues. However, they have also resulted in increased complexity...
Developing deep‐blue emitters for organic light‐emitting diodes (OLEDs) is critical but challenging, which requires a good balance between light color, exciton utilization, and photoluminescence quantum yield (PLQY) of solid film. Herein, a high‐quality deep‐blue emitter, abbreviated 2TriPE‐CzMCN, is designed by introducing an aggregation‐induced emission (AIE) group into a crossed long‐short axis...
Organic Light‐Emitting Diodes
In article number 2308468, Han Zhang, Zhiming Wang, Ben Zhong Tang, and co‐workers present a high‐quality deep‐blue emitter with a crossed long‐short axis skeleton, which combines aggregation‐induced emission and “hot exciton” mechanism and realizes versatile high‐performance organic light‐emitting diodes (OLEDs), including efficiency‐beating blue aggregation‐induced...
The transition metal–nitrogen–carbon (M─N─C) with MNx sites has shown great potential in CO2 electroreduction (CO2RR) for producing high value‐added C1 products. However, a comprehensive and profound understanding of the intrinsic relationship between the density of metal single atoms and the CO2RR performance is still lacking. Herein, a series of Ni single‐atom catalysts is deliberately designed...
Radium‐223 (223Ra) is the first‐in‐class alpha‐emitter to mediate tumor eradication, which is commonly thought to kill tumor cells by directly cleaving double‐strand DNA. However, the immunogenic characteristics and cell death modalities triggered by 223Ra remain unclear. Here, it is reported that the 223Ra irradiation induces the pro‐inflammatory damage‐associated molecular patterns including calreticulin,...
Selective hydrogenation of nitrostyrenes is a great challenge due to the competitive activation of the nitro groups (─NO2) and carbon–carbon (C═C) double bonds. Photocatalysis has emerged as an alternative to thermocatalysis for the selective hydrogenation reaction, bypassing the precious metal costs and harsh conditions. Herein, two crystalline phases of layered ternary sulfide Cu2WS4, that is, body‐centered...
Solid‐state batteries have become the most anticipated option for compatibility with high‐energy density and safety. In situ polymerization, a novel strategy for the construction of solid‐state systems, has extended its application from solid polymer electrolyte systems to other solid‐state systems. This review summarizes the application of in situ polymerization strategies in solid‐state batteries,...
Insight into fundamental light‐matter interaction as well as underlying photo‐physical processes is crucial for the development of novel optoelectronic devices. Palladium diselenide (PdSe2), an important representative of emerging 2D noble metal dichalcogenides, has gain considerable attention owing to its unique optical, physical, and chemical properties. In this study, 2D PdSe2 nanosheets (NSs)...
The introduction of structural complexity to nanoparticles brings them interesting properties. Regularity breaking has been challenging in the chemical synthesis of nanoparticles. Most reported chemical methods for synthesizing irregular nanoparticles are complicated and laborious, largely hindering the exploration of structural irregularity in nanoscience. In this study, the authors have combined...
Bitten Gold Nanoparticles
Unprecedented bitten gold nanoparticles are produced through a combination of seed‐mediated growth and chemical etching. Each nanoparticle has an irregular nanocavity on it. The presence of an irregular nanocavity causes the bitten gold nanoparticles to exhibit strong single‐particle chiroptical responses. More details can be found in article number 2301476 by Jianfang Wang...
Early transition metals based 2D carbides, nitrides and carbonitrides nanomaterials are known as MXenes, a novel and extensive new class of 2D materials family. Since the first accidently synthesis based discovery of Ti3C2 in 2011, more than 50 additional compositions have been experimentally reported, including at least eight distinct synthesis methods and also more than 100 stoichiometries are theoretically...
In this work, a near‐ultraviolet (NUV) emitter, 2MCz‐CNMCz, with hot‐exciton property is designed based on a “long‐short axis” strategy, which exhibits good thermal stability, bipolar carrier transport ability, and high T1 energy level. Its nondoped NUV organic light‐emitting diode (OLED) achieves a record maximum external quantum efficiency (ηext) of 7.76%, with a peak at 404 nm and CIE coordinates...
Lithium (Li) metal batteries (LMBs) face huge challenges to achieve long cycling life at wide temperature range owing to the severe dendrite growth at subambient temperature and the intense side reactions with electrolyte at high temperature. Herein, an ultrathin LiBO2 layer with an extremely high Young's modulus of 8.0 GPa is constructed on Li anode via an in situ reaction between Li metal and 4,4,5,5‐tetramethyl‐1,3,2‐dioxa‐borolane...
Photodetectors
The cover image describes the design of three‐electrode photo‐electrochemical photodetectors based on lanthanide‐doped carbon quantum dots (CQDs). Owing to the coordination of lanthanides and internal energy transfer between lanthanides and CQDs, the as‐fabricated photodetectors not only show an excellent photo‐response performance, but also exhibit a narrow‐band response behavior....
The present work demonstrates a facile hydrothermal approach to synthesize lanthanide‐doped carbon quantum dots (CQDs) with europium and/or gadolinium elements. Taking the advantage of broadband adsorption in the ultraviolet‐visible region, the doped QDs are directly used as building blocks for photo‐electrochemical (PEC)‐type photodetectors (PDs) and their performance is systematically investigated...
Given the electronegativity and bonding environment of halogen elements, halogenation (i.e., fluorination, chlorination, bromination, and iodination) serves as a versatile strategy for chemical modifications of materials. The combination of halogens and 2D materials has triggered extensive interests since the first report on graphene fluorination in 2008. Subsequently, scholars consistently conduct...
Recently, 2D materials are in great demand for various applications such as optical devices, supercapacitors, sensors, and biomedicine. MXenes as a kind of novel 2D material have attracted considerable research interest due to their outstanding mechanical, thermal, electrical, and optical properties. Especially, the excellent nonlinear optical response enables them to be potential candidates for the...
MXenes as a kind of novel 2D transition metal carbon and/or nitrogen materials are commonly prepared by etching A‐group elements (mostly groups 13 or 14) from MAX phases. Owing to the excellent optical properties, MXenes have been widely used to realize ultrafast pulses in different lasers. In article number 2006054, Jiebo Li, Han Zhang, and co‐workers review the state of the art of MXenes, where...
2D PbS nanoplatelets (NPLs) form an emerging class of photoactive materials and have been proposed as robust materials for high‐performance optoelectronic devices. However, the main drawback of PbS NPLs is the large lateral size, which inhibits their further investigations and practical applications. In this work, ultra‐small 2D PbS NPLs with uniform lateral size (11.2 ± 1.7 nm) and thickness (3.7 ±...
In article number 2004677, Han Zhang, Yang Tan, Feng Chen, and co‐workers demonstrate that the antibacterial ability against drug‐resistant bacteria can be endowed to transition metal dichalcogenides (XS2, X = Mo/W) quantum dots by sulfur vacancies, and their application in bacterial keratitis. The sulfur vacancies generated by the ion irradiation result in the one‐way electron transport from the...
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