Exfoliated AgInP2Se6 nanosheets are incorporated into a polyacrylonitrile (PAN) polymer matrix by electrospinning and applied for the first time in a triboelectric nanogenerator (TENG). The hybrid me...

Schematic representation of band alignment and scanning transmission electron microscopy (STEM) image of Mo2S3-WS2 nanocomposites.

Designing an affordable device that seamlessly combines efficient electrochemical energy storage with straightforward, robust protocols represents a promising pathway for ushering in the next generati...

High-entropy alloys have emerged as a class of materials, offering unique properties due to their irregular and randomized arrangement of multiple elements in an ordered lattice. This concept has been extended to two-dimensional (2D) van der Waals materials, including transition metal dichalcogenides (TMD), which exhibit promising applications in electrocatalysis. In this work, we have explored the synthesis of entropy mixture crystals (TMDmix) involving the chemical vapor transport of five individual elements, Mo and W as metal elements, S, Se, and Te as chalcogenide elements, resulting in a crystalline structure with a controlled composition Mo0.56W0.44(S0.33Se0.35Te0.32)2, with an estimated ΔSmix of 0.96R. When observed along the [001] zone axis, STEM HAADF images indicate the presence of the different crystal phases of the 2D TMDs (1T, 2H, and 3R). Our findings demonstrate the potential of the entropy TMDmix materials as catalysts for the hydrogen evolution reaction, offering an alternative to noble metal-based catalysts. To maximize the potential of TMDmix, we chose chemical exfoliation with the resulting material being subdivided into size groups, big and small, according to their lateral size. In an acidic medium, the lowest overpotential of 127 mV and a Tafel slope of 79 mV/dec were obtained for the exfoliated sample with a small lateral size (exf-TMDsmall).

Devices based on a vertical van der Waals heterostructure of solution-processed zirconium oxide and molybdenum disulfide can reconfigure between transistor and diode modes, and be fabricated on the wa...

The electron transport layer (ETL) of tin dioxide (SnO2) plays a pivotal role in n–i–p perovskite solar cells (PSCs) by facilitating the extraction of photogenerated electrons and blocking the transpo...

A novel nanoscale optomagnetic sensing approach is developed using whispering-gallery mode resonances in a self-rolled-up microcavity. This method enables ultra-sensitive detection of weak magnetism ...

Developing chemistries for positive electrodes with large specific capacities and high operating potentials is highly desirable for aqueous zinc batteries. Here, authors report a reversible Se electro...

Monolayers of semiconducting transition metal dichalcogenides (TMDCs) are known for their unique excitonic photoluminescence (PL), which can be tuned by interfacing them with other materials. However,...

Apr 14, 2025 | The research group of prof. Sofer based at the Department of Inorganic Chemistry of UCT Prague is keen to welcome highly motivated, talented... | NEW JOB

Tin is one of the most selective electrocatalysts for CO2 reduction (CO2RR), mostly thanks to its poor activity towards the hydrogen evolution reactio…

Electronic structure modification via intercalative electron-doping of α-RuCl3, a two-dimensional (2D) transition metal halide, imparts unique optoelectronic properties such as near-infrared (NIR) absorption. While bulk-scale RuCl3 nanosheet production has been established using conventional liquid phase exfoliation, printed devices compatible with scalable manufacturing remain unexplored. Here, we demonstrate fully aerosol-jet-printed (AJP) NIR photodetectors based on megasonically processed RuCl3 nanosheets. The NIR photoresponse is enhanced by intercalation-based electron-doping in two stages: primary electrochemical intercalation of bulk RuCl3 crystals with quaternary ammonium bromides followed by megasonic exfoliation and secondary intercalation with polyvinylpyrrolidone. The degree of doping is controlled by the starting size of the primary intercalant, as larger primary intercalants ultimately enable greater secondary intercalation and electron-doping. In this manner, the combination of two-step intercalative doping and megasonic processing results in fully printed photodetectors with NIR responsivity of 244 mA/W at 1550 nm, outperforming previous reports by more than an order of magnitude.

npj 2D Materials and Applications - Raman polarization switching in CrSBr

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