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As an essential component of future full‐color displays, blue perovskite light‐emitting diodes (PeLEDs) still lag far behind the red and green counterparts in the device performances. In the mainstream quasi‐2D blue perovskite system, trap‐mediated nonradiative loss, low energy transfer efficiency, and interface fluorescence quenching remain significant challenges. Herein, guanidinium thiocyanate...
Nitrogen‐doped titanium carbides (MXene) films exhibit extraordinary volumetric capacitance when high‐concentration sulfuric acid electrolyte is utilized owing to the enhancement of pseudocapacitance. However, the energy storage mechanism of nitrogen‐doped MXene is unclear due to the complex electrode structure and electrolyte ions’ behavior. Here, based on pristine MXene (Ti3C2O2), three different...
Pt‐based supported materials, a widely used electrocatalyst for hydrogen evolution reaction (HER), often experience unavoidable electron loss, resulting in a mismatching of electronic structure and HER behavior. Here, a Pt/WO3 catalyst consisting of Pt species strongly coupled with defective WO3 polycrystalline nanorods is rationally designed. The electronic structure engineering of Pt sites on WO...
1D carbon nanotubes have been widely applied in many fields, such as catalysis, sensing and energy storage. However, the long tunnel‐like pores and relatively low specific surface area of carbon nanotubes often restrict their performance in certain applications. Herein, a dual‐silica template‐mediated method to prepare nitrogen‐doped mesoporous carbon nanotubes (NMCTs) through co‐depositing polydopamine...
2D MXene nanoflakes usually undergo serious restacking, that easily aggravates during the traditional vacuum‐assisted filtration process; and thus, hinders the electrochemical performance of the corresponding film electrodes. Herein, 3D porous compact 1D/2D Fe2O3/MXene aerogel film electrode with an enhanced electrochemical performance is fabricated by freeze‐drying assisted mechanical pressing. An...
Controlling the morphology, composition, and crystalline phase of mesoporous nonnoble metal catalysts is essential for improving their performance. Herein, well‐defined P‐ and B‐codoped NiFe alloy mesoporous nanospheres (NiFeB‐P MNs) with an adjustable Ni/Fe ratio and large mesopores (11 nm) are synthesized via soft‐template‐based chemical reduction and a subsequent phosphine‐vapor‐based phosphidation...
MAX phases are frequently dominated as precursors for the preparation of the star material MXene, but less eye‐dazzling by their own potential applications. In this work, the electrocatalytic hydrogen evolution reaction (HER) activity of MAX phase is investigated. The MAX‐derived electrocatalysts are prepared by a two‐step in situ electrosynthesis process, an electrochemical etching step followed...
MoS2 Devices
In article number 2106411, Wen‐Wei Wu and co‐workers reveal the direct observation of an MoS2 device under biasing via powerful in situ transmission electron microscopy (TEM). During in situ TEM biasing, the MoS2 is etched vertically and horizontally; the former is dominated by knock‐on damage, while the latter involves atomic migration induced by Joule heating. Also, the long cracks...
2D materials have great potential for not only device scaling but also various applications. To prompt the development of 2D electronics and optoelectronics, a better understanding of the limitation of materials is essential. Material failure caused by bias can lead to variations in device behavior and even electrical breakdown. In this study, the structural evolution of monolayer MoS2 with high bias...
In article number 1905516, Wen‐Wei Wu and co‐workers fabricate the hybrids of heterojunctions of few‐layer MoS2 in terms of diverse layer variation and stacking configuration, through in‐situ scanning/transmission electron microscopy heating. The salient dynamics inherent in few‐layer MoS2 are investigated and first observed at the atomic scale, including scrolling, folding, etching, and restructuring...
Layered MoS2 is a prospective candidate for use in energy harvesting, valleytronics, and nanoelectronics. Its properties strongly related to its stacking configuration and the number of layers. Due to its atomically thin nature, understanding the atomic‐level and structural modifications of 2D transition metal dichalcogenides is still underdeveloped, particularly the spatial control and selective...
Enhanced photo‐carrier generation with selectable wavelengths by M‐decorated‐CuInS2 nanocrystals (M=Au and Pt) synthesized in a single surfactant process on MoS2 bilayers is demonstrated in article number 1803529 by Yu‐Lun Chueh and co‐workers. The strategy described here acts as a perspective to significantly improve the performance of MoS2‐based photodetectors with controllable absorption wavelengths...
A facile approach for the synthesis of Au‐ and Pt‐decorated CuInS2 nanocrystals (CIS NCs) as sensitizer materials on the top of MoS2 bilayers is demonstrated. A single surfactant (oleylamine) is used to prepare such heterostructured noble metal decorated CIS NCs from the pristine CIS. Such a feasible way to synthesize heterostructured noble metal decorated CIS NCs from the single surfactant can stimulate...
Rapid and simultaneous detection of multiple potential pathogens by portable devices can facilitate early diagnosis of infectious diseases, and allow for rapid and effective implementation of disease prevention and treatment measures. The development of a ZnO nanorod integrated microdevice as a multiplex immunofluorescence platform for highly sensitive and selective detection of avian influenza virus...
In article number 1700425, Si‐Yang Zheng and co‐workers, develop a smart ZnO nanorods integrated microdevice for highly sensitive and multiplex avian influenza virus detection. By dissolving ZnO nanorods in a low acid environment, the captured viruses could be released for the subsequent analysis. This technology can be expanded to detect other pathogens and disease biomarkers in clinical trials....
In article number 1603135, S.‐Y. Zheng and co‐workers develop a point of care device integrated with porous silicon nanowire forests for influenza virus capturing based on their sizes only. By dissolving nanowire forests in physiological aqueous environments, subsequently captured viruses could be released without damage for culturing, characterization, and other analysis. The device shows potential...
Viral diseases are perpetual threats to human and animal health. Detection and characterization of viral pathogens require accurate, sensitive, and rapid diagnostic assays. For field and clinical samples, the sample preparation procedures limit the ultimate performance and utility of the overall virus diagnostic protocols. This study presents the development of a microfluidic device embedded with...
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