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Reducing the dark current of photodetectors is an important strategy for enhancing the detection sensitivity, but hampered by the manufacturing cost due to the need for controlling the complex material composition and processing intricate interface. This study reports a new single‐component photochromic semiconductor, [(HDMA)4(Pb3Br10)(PhSQ)2]n (1, HDMA = dimethylamine cation, PhSQ = 1‐(4‐sulfophenyl)−4,4’‐bipyridinium),...
Although zinc metal anode is promising for zinc‐ion batteries (ZIBs) owing to high energy density, its reversibility is significantly obstructed by uncontrolled dendrite growth and parasitic reactions. Optimizing electrolytes is a facile yet effective method to simultaneously address these issues. Herein, 2‐(N‐morpholino)ethanesulfonic acid (MES), a pH buffer as novel additive, is initially introduced...
Coordination Polymers
In article number 2302492, Fa‐Kun Zheng, Guo‐Cong Guo, and co‐workers first reveal a coordination polymers (CPs)‐based direct X‐ray detector with anisotropic charge transport from the perspective of structural chemistry. This study provides beneficial guidance and deep insight for designing high‐performance CPs‐based X‐ray detectors.
Anisotropic charge transport plays a pivotal role in clarifying the conductivity mechanism in direct X‐ray detection to improve the detection sensitivity. However, the anisotropic photoelectric effect of semiconductive single crystal responsive to X‐ray is still lacking of theoretical and experimental proof. The semiconductive coordination polymers (CPs) with designable structures, adjustable functions,...
Electrocatalysts based on Fe and other transition metals are regarded as most promising candidates for accelerating the oxygen evolution reaction (OER), whereas whether Fe is the catalytic active site for OER is still under debate. Here, unary Fe‐ and binary FeNi‐ based catalysts, FeOOH and FeNi(OH)x, are produced by self‐reconstruction. The former is a dual‐phased FeOOH, possessing abundant oxygen...
Janus particles with asymmetric crystals show great importance in optoelectronics and photocatalysis, but their synthesis usually requires complicated procedures. Here, an unexpected Janus vitrification phenomenon is observed in a droplet caused by the Leidenfrost effect at a cryogenic temperature, which is commonly regarded as symmetric. The Leidenfrost phenomenon levitates the droplet when it comes...
In article number 2007325, Tian Jian Lu, Feng Xu, and co‐workers observed for the first time the Janus vitrification phenomenon in a droplet when it is levitated on liquid nitrogen by the Leidenfrost phenomenon. This finding reveals the asymmetric crystallization process in droplet vitrification, and opens a new door to create Janus particles through the Leidenfrost phenomenon.
Up to now, the silicon‐graphite anode materials with commercial prospect for lithium batteries (LIBs) still face three dilemmas of the huge volume effect, the poor interface compatibility, and the high resistance. To address the above challenges, micro–nano structured composites of graphite coating by ZnO‐incorporated and carbon‐coated silicon (marked as Gr@ZnO‐Si‐C) are reasonably synthesized via...
2D metal phosphide loop‐sheet heterostructures are controllably synthesized by edge‐topological regulation, where Ni2P nanosheets are edge‐confined by the N‐doped carbon loop, containing ultrafine NiFeP nanocrystals (denoted as NiFeP@NC/Ni2P). This loop‐sheet feature with lifted‐edges prevents the stacking of nanosheets and induces accessible open channels for catalytic site exposure and gas bubble...
2D metal phosphide loop‐sheet heterostructures are controllably synthesized by edge‐topological regulation, where Ni2P nanosheets are edge‐confined by the N‐doped carbon loop containing ultrafine NiFeP nanocrystals. In article number 2006860, Johnny C. Ho and co‐workers report that the loop‐sheet feature with lifted‐edges can prevent the self‐stacking of 2D nanosheets and induce accessible open channels...
The carbonaceous materials with low cost and high safety have been considered as promising anodes for potassium‐ion batteries (PIBs). However, it is still a challenge to design a carbonaceous material with long cycle life and high rate performance due to the poor K+ reaction kinetics. Herein, this article reports a N‐doped porous carbon framework (NPCF) with a high nitrogen content of 13.57 at% within...
For Si anode materials used for lithium ion batteries (LIBs), developing an effective solution to overcome their drawbacks of large volume change and poor electronic conductivity is highly desirable. Here, the composites of ZnO‐incorporated and carbon‐coated silicon/porous‐carbon nanofibers (ZnO‐Si@C‐PCNFs) are designed and synthesized via a traditional electrospinning method. The prepared ZnO‐Si@C‐PCNFs...
Layered stacking and highly porous N, P co‐doped Mo2C/C nanosheets are prepared from a stable Mo‐enhanced hydrogel. The hydrogel is formed through the ultrafast cross‐linking of phosphomolybdic acid and chitosan. During the reduction of the composite hydrogel framework under inert gas protection, highly porous N and P co‐doped carbon nanosheets are produced with the in situ formation of ultrafine...
Based on biocompatible and stretchable hydrogels, Fei Li, Feng Xu, and co‐workers propose a simple paradigm to prototype stretchable electronics with an embedded 3D helical conductive layout in article number 1801711. The 3D layout promises enhanced stretchability and robustness compared to traditional 1D and 2D designs. The hydrogel electronics can be directly incorporated onto the human body and...
The ever‐growing overlap between stretchable electronic devices and wearable healthcare applications is igniting the discovery of novel biocompatible and skin‐like materials for human‐friendly stretchable electronics fabrication. Amongst all potential candidates, hydrogels with excellent biocompatibility and mechanical features close to human tissues are constituting a promising troop for realizing...
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