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A rational design of sulfur host is the key to conquering the“polysulfide shuttle effects” by accelerating the polysulfide conversion. Since the process involves solid–liquid–solid multistep phase transitions, purposely‐engineered heterostructure catalysts with various active regions for catalyzing conversion steps correspondingly are beneficial to promote the overall conversion process. However,...
Highly Volumetric‐Performance Supercapacitors
The structural disorder and low crystallinity of source material can restrict the generation of graphitized microcrystals. Inspired by high cellulose content from natural ramie, in article number 2303349, Weiqing Yang and co‐workers report a simple capillary evaporation method to efficiently build the high‐dense conductive ramie carbon with highly graphitized...
Conductive biomass carbon possesses unique properties of excellent conductivity and outstanding thermal stability, which can be widely used as conductive additive. However, building the high‐dense conductive biomass carbon with highly graphitized microcrystals at a lower carbonization temperature is still a major challenge because of structural disorder and low crystallinity of source material. Herein,...
Organic ferromagnetic materials offer great promise for spintronic devices, carbon‐based chips, and quantum communications, but remain as a challenging issue due to their low saturation magnetization and/or unsustainable ferromagnetic properties. To date, magnetic ion polymers have displayed paramagnetism without exception at room‐temperature. In this study, it is reported for the first time that,...
P2 layered oxides have attracted more and more attention as cathode materials of high‐power sodium‐ion batteries (SIBs). During the charging process, the release of sodium ions leads to layer slip, which leads to the transformation of P2 phase into O2 phase, resulting in a sharp decline in capacity. However, many cathode materials do not undergo P2‐O2 transition during charging and discharging, but...
DNA amplification machines show great promise for intracellular imaging, yet are always constrained by off‐site machinery activation or signal leakage, originating from the inherent thermodynamically driven hybridization between machinery substrates. Herein, an entropy‐driven catalytic DNA amplification machine is integrated with the on‐site amplified substrate exposure procedure to realize the high‐contrast...
Energy Harvesting
In article number 2104472, Qing Wang, Chang Kyu Jeong, and co‐workers study the enhancement of piezoelectric device performance using the morphotropic phase boundary behavior of polyvinylidene fluoride‐based polymers related with its relaxor property. Moreover, it is proved that the characteristics are maintained in the nanofiber feature.
Ferroelectric and piezoelectric polymers have attracted great attention from many research and engineering fields due to its mechanical robustness and flexibility as well as cost‐effectiveness and easy processibility. Nevertheless, the electrical performance of piezoelectric polymers is very hard to reach that of piezoelectric ceramics basically and physically, even in the case of the representative...
Developing efficient and robust non‐precious‐metal‐based catalysts to accelerate electrocatalytic reaction kinetics is crucial for electrochemical water‐urea splitting. Herein, Fe‐doped NiS–NiS2 heterostructured microspheres, an electrocatalyst, are synthesized via etching Prussian blue analogues following a controlled annealing treatment. The resulting microspheres are constructed by mesoporous nanoplates,...
Structural modulation of core‐shell silver nanoclusters from the inside is a huge challenge but of great importance in their syntheses. Herein, two silver nanoclusters [Ag3S9@Ag42] (SD/Ag45b) and [Ag9S9@Ag42] (SD/Ag51a) are isolated in the presence of different kinds of sulfonic acids. Uniquely, SD/Ag45b and SD/Ag51a show typical core‐shell structures with the similar Ag42 shell but different cores...
The enhancement of the catalytic activity of gold nanoparticles with their decreasing size is often attributed to the increasing proportion of low‐coordinated surface sites. This correlation is based on the paradigmatic picture of working gold nanoparticles as perfect crystal forms having complete and static outer surface layers whatever their size. This picture is incomplete as catalysts can dynamically...
Flexible Wearables for Plants
Recent research progress in flexible wearables for plants is comprehensively reviewed by Xi‐Qing Wang, Zhi‐Zhu He, and co‐workers in article number 2104482. The emerging applications of flexible plant wearables, including physiological indicators, surrounding environment, crop quality, and active control of growth, are highlighted. The future opportunities and challenges...
The excellent stretchability and biocompatibility of flexible sensors have inspired an emerging field of plant wearables, which enable intimate contact with the plants to continuously monitor the growth status and localized microclimate in real‐time. Plant flexible wearables provide a promising platform for the development of plant phenotype and the construction of intelligent agriculture via monitoring...
Transition‐metal selenides (TMSs) have emerged as prospective anode materials for sodium ion batteries (SIBs), owing to their considerable theoretical capacity and intrinsic high electronic conductivity. Whereas, TMSs still suffer from poor rate capability and inferior cycling stability induced by sluggish kinetics and severe volume changes during de/sodiation processes. Herein, a hierarchical composite...
In article number 1903266, Fuan Wang and co‐workers construct a mitochondria‐specific lighting up fluorescent Mito‐Cy, that is capable of spatiotemporally tracking the programmable mitochondrial membrane potential (MMP) evolutions in live cells, thus holding great promise for illustrating mitochondria‐involved pathophysiological pathways.
Mitochondrial membrane potential (MMP) represents an essential parameter of cellular activities, and even a minute MMP variation could significantly affect the biological functions of living organisms. Thus, convenient and accurate MMP detection is highly desirable since conventional MMP probes are always constrained by photobleaching, inconvenience, and irreversibility. Herein, a spatial‐dependent...
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