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Constructing heterogeneous nanostructures is an efficient strategy to improve the electrical and ionic conductivity of metal chalcogenide‐based anodes. Herein, ZnS/SnO2 quantum dots (QDs) as p‐n heterojunctions that are uniformly anchored to reduced graphene oxides (ZnS‐SnO2@rGO) are designed and engineered. Combining the merits of fast electron transport via the internal electric field and a greatly...
Homogeneous and nanometric metal clusters with unique electronic structures are promising for catalysis, however, common synthesis techniques for metal clusters suffer from large size and even metal nanocrystals attributing to their high surface energy and unsaturated configurations. Herein, a generalized rapid annealing strategy for synthesizing a series of supported metal clusters as superior catalysts...
Ultra‐Narrow Linewidth Photo‐Emitters
In article number 2204302, Khurram Shehzad, Hui Wu, Zhiming Wang, and co‐workers report that hot‐pressing bulk Selenium into nanoflakes induces structural changes in the Selenium lattice, which leads to ultra‐narrow bandwidth photoemission with full width at half maximum of 330 ± 90 μeV, an order of magnitude narrower than the other 2D materials at 300 K.
Photoluminescence (PL) in state‐of‐the‐art 2D materials suffers from narrow spectral coverage, relatively broad linewidths, and poor room‐temperature (RT) functionality. The authors report ultra‐narrow linewidth photo‐emitters (ULPs) across the visible to near‐infrared wavelength at RT in polymorphic selenium nanoflakes (SeNFs), synthesized via a hot‐pressing strategy. Photo‐emitters in NIR exhibit...
A promising anode material consisting of bimetallic thiophosphate ZnxCo1−xPS3 and CoS2 with 2D/3D heterostructure is designed and prepared by an effective chemical transformation. Density functional theory calculations illustrate that the Zn2+ can effectively modulate the electrical ordering of ZnxCo1−xPS3 on the nanoscale: the reduced charge distribution emerging around the Zn ions can enhance the...
In article number 1800994, Lan Yin and co‐workers propose a high‐performance fully biodegradable primary battery system. Energy provided by a single cell could satisfy most ultralow‐power implantable devices and maintain robust functions. The battery is fully degradable both in vitro and in vivo. The battery system could find application in biodegradable, electronic implants for advanced diagnosis...
Biodegradable transient devices represent an emerging type of electronics that could play an essential role in medical therapeutic/diagnostic processes, such as wound healing and tissue regeneration. The associated biodegradable power sources, however, remain as a major challenge toward future clinical applications, as the demonstrated electrical stimulation and sensing functions are limited by wired...
Particulate matter (PM) is a major air pollutant in many regions, jeopardizing ecosystems and public health. Filtration at pollutant source is one of the most important ways to protect the environment, however, considering the high‐temperature exhaust gas emissions, effective removal of PM and related pollutants from their sources remains a major challenge. In this study, a resilient, heat‐resisting,...
Despite substantial progress in the science and technology of 2D nanomaterials, facile fabrication of ultrathin 2D metals remains challenging. Herein, an efficient hot‐pressing method is developed to fabricate free‐standing ultrathin Bi nanosheets from Bi nanoparticles. Highly crystalline Bi nanosheets with thickness as low as ≈2 nm and area of more than several micrometers are successfully fabricated...
Thermoelectric NaCo2O4/TiO2 coaxial nanofibers are prepared and distributed in the perovskite solar cells. Under illumination, p‐type NaCo2O4 can convert unwanted heat to thermal voltage, and thus promote the electron extraction and transport with the action of electrostatic force. These advantages collectively contribute to an overall power conversion efficiency improvement of ≈20% (15.14% vs 12...
Silicon‐based nanoparticles with unique “nanodandelion” structures are synthesized by a simple and efficient laser ablation method. Such material can be used as a stable anode for Li‐ion batteries with a high capacity of ≈1500 mAh g−1 and for more than 800 electrochemical cycles without obvious capacity decay.
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