Robust Two-Dimensional Ferromagnetism in CrTe/CrTe Heterostructure with Curie Temperature above 400 K.

The discovery of ferromagnetism in two-dimensional (2D) van der Waals crystals has generated widespread interest. The seeking of robust 2D ferromagnets with high Curie temperature () is vitally important for next-generation spintronic devices. However, owing to the enhanced spin fluctuation and weak exchange interaction upon the reduced dimensionalities, the exploring of robust 2D ferromagnets with > 300 K is highly demanded but remains challenging.

Anisotropic charge transfer and gate tuning for p-SnS/n-MoS vertical van der Waals diodes.

2D-material-based van der Waals heterostructures (vdWhs) have shown great potential in next-generation multi-functional microelectronic devices. Thanks to their sharp interface and ultrathin thickness, 2D p-n junctions with high rectification properties have been established by combining p-type monochalcogenides with n-type transition metal dichalcogenides. However, the anisotropic rectification together with the charge transfer and gate effect has not been clarified.

Benchtop F Nuclear Magnetic Resonance (NMR) Spectroscopy Provides Mechanistic Insight into the Biginelli Condensation toward the Chemical Synthesis of Novel Trifluorinated Dihydro- and Tetrahydropyrimidinones as Antiproliferative Agents.

Benchtop nuclear magnetic resonance (NMR) spectroscopy has enabled the monitoring and optimization of chemical transformations while simultaneously providing kinetic, mechanistic, and structural insight into reaction pathways with quantitative precision. Moreover, benchtop NMR proton lock capabilities further allow for rapid and convenient monitoring of various organic reactions in real time, as the use of deuterated solvents is not required. The complementary role of F NMR-based kinetic monitoring in the fluorination of bioactive compounds has many benefits in the drug discovery process since fluorinated motifs additionally improve drug pharmacology.

TaqMan-MGB PCR Method for Rapid Detection of QoI Fungicide Resistance in Chinese Populations of .

Grape downy mildew caused by is one of the most devastating diseases of grapevine worldwide. Quinone outside inhibitor (QoI) fungicides are commonly used for the control of the pathogen in grape fields across China. However, their recurrent use could lead to the emergence of resistance against these compounds.

Association of high PM levels with short-term and medium-term lung function recovery in patients with pulmonary lobectomy.

The association between exposure to ambient fine particulate matter with an aerodynamic diameter of ≤ 2.5 μm (PM) and short- and medium-term lung function recovery (LFR) in patients undergoing lobectomy remains uncertain. This study investigated the associations between PM concentrations and LFR in adult patients ( = 526) who underwent video-assisted thoracoscopic (VATS) lobectomy in Guangzhou, China between January 2018 and June 2021.

Detection and Characterization of Carboxylic Acid Amide-Resistant in China Using a TaqMan-MGB Real-Time PCR.

Grape production is increasing globally and so are problems with downy mildew, one of the main constraints in grape production. Downy mildew on grape is caused by , an obligate biotrophic pathogen belonging to the oomycetes. Control of the disease is usually performed by fungicide applications, of which carboxylic acid amide (CAA) fungicides represent one of the most widely used groups of fungicides.

Strategic modulation of energy transfer in Au-TiO-Pt nanodumbbells: plasmon-enhanced hydrogen evolution reaction.

Owing to the capacity of efficiently harvesting and converting incident energy, localized surface-plasmon resonance of noble metals was introduced into a metal-semiconductor design for promoting hydrogen evolution. In this study, a plasmonic nanodumbbell structure was employed to strategically modulate the energy transfer in the water reduction reaction. A maximum H2 evolution rate of 80 μmol g-1 h-1 was obtained in the Au-TiO2 nanodumbbells, and further improvement was achieved through surface modification with Pt nanoparticles functioning as active sites, leading to ∼4.

[Effects of straw returning combined with nitrogen fertilizer on spring maize yield and soil physicochemical properties under drip irrigation condition in Yellow River pumping irrigation area, Ningxia, China].

Soil compaction and nutrient deficiency are common problems in Ningxia Yellow River pumping irrigation area, which adversely affect crop yield. A two-year (2017-2018) field experiment of straw returning combined with nitrogen fertilizer were designed. Four nitrogen application levels (pure N with 0, 150, 300 and 450 kg·hm) were set under the condition of full smashing of maize straw (12000 kg·hm) returning, with the conventional nitrogen application (pure N with 225 kg·hm) without straw returning as the control (CK) to investigate the effects of straw returning combined with different amounts of nitrogen fertilizer on soil physical and chemical properties and maize yield under drip irrigation condition.

Lasing from reduced dimensional perovskite microplatelets: Fabry-Pérot or whispering-gallery-mode?

Cesium lead bromide (CsPbBr) perovskite has attracted great attention recently for its potentials for next-generation green-color lasing devices owing to the relatively high structural stability and the high emission efficiency among the perovskite family. Herein, we explore the origins of cavity modes in CsPbBr microplatelets (MPs) lasers by using angle-resolved microphotoluminescence Fourier imaging technique, which is still controversial so far. In-plane Fabry-Pérot (F-P) mode lasing transition to whispering-gallery-mode (WGM) lasing is verified at room temperature, which mostly occurs in large MPs with edge length (L) over 13 μm.

Boosting the electrocatalytic activity of amorphous molybdenum sulfide nanoflakes via nickel sulfide decoration.

As a coordination polymer built of [MoS] clusters, amorphous nanoscale MoS (a-MoS) is an attractive electrocatalyst for the hydrogen evolution reaction (HER) due to its abundant active sites and scalable synthesis. However, clarifying the internal catalytic mechanism and achieving even higher HER performance with scalable size are still challenging. Herein, a new hybrid catalyst of a-MoS flakes decorated with NiS nanocrystals (size < 10 nm) has been successfully synthesized on 10 × 20 cm-sized Ni foam by a portable hydrothermal route.

Vapor-Phase Incommensurate Heteroepitaxy of Oriented Single-Crystal CsPbBr on GaN: Toward Integrated Optoelectronic Applications.

Integrating metallic halide perovskites with established modern semiconductor technology is significant for promoting the development of application-level optoelectronic devices. To realize such devices, exploring the growth dynamics and interfacial carrier dynamics of perovskites deposited on the core materials of semiconductor technology is essential. Herein, we report the incommensurate heteroepitaxy of highly oriented single-crystal cesium lead bromide (CsPbBr) on -wurtzite GaN/sapphire substrates with atomically smooth surface and uniform rectangular shape by chemical vapor deposition.

Colloidal Cd Zn S nanocrystals as efficient photocatalysts for H production under visible-light irradiation.

Cd Zn S nanocrystals with sizes ranging from 3-11 nm were synthesized by a simple organic solution method. The nanocrystals possess a cubic zinc-blende structure and the bandgap blue-shifts from 2.1 eV to 3.

Effect of maternal and embryonic factors on frozen-thawed IVF-ET outcome after pre-equilibration with hyaluronan.

Purpose: To systematically evaluate the effect of maternal and embryonic factors on in vitro fertilization and embryo transfer (IVF-ET) outcomes among Chinese patients after using hyaluronan-enriched transfer medium (HETM).

Methods: This retrospective study included 637 frozen-thawed ET cycles. Patients were divided into subgroups based on their maternal or embryonic status or treatment procedures.

Ultrathin CsPbX Nanowire Arrays with Strong Emission Anisotropy.

1D nanowires of all-inorganic lead halide perovskites represent a good architecture for the development of polarization-sensitive optoelectronic devices due to their high absorption efficient, emission yield, and dielectric constants. However, among as-fabricated perovskite nanowires with the lateral dimensions of hundreds nanometers so far, the optical anisotropy is hindered and rarely explored owing to the invalidating of electrostatic dielectric mismatch in the physical dimensions. Here, well-aligned CsPbBr and CsPbCl nanowires with thickness T down to 15 and 7 nm, respectively, are synthesized using a vapor phase van der Waals epitaxial method.

Enhanced Photocatalytic Hydrogen Evolution by Loading CdZnS QDs onto NiP Porous Nanosheets.

NiP has been decorated on CdS nanowires or nanorods for efficient photocatalytic H production, whereas the specific surface area remains limited because of the large size. Here, the composites of CdZnS quantum dots (QDs) on thin NiP porous nanosheets with high specific surface area were constructed for noble metal-free photocatalytic H generation. The porous NiP nanosheets, which were formed by the interconnection of 15-30 nm-sized NiP nanoparticles, allowed the uniform loading of 7 nm-sized CdZnS QDs and the loading density being controllable.

The changing pattern of urban flooding in Guangzhou, China.

Extensive research has focused on modelling and analysis of urban flooding in relatively small catchments. Findings in small areas tend to be site-specific, and may not be applicable to larger study areas. Larger scale studies can identify general patterns and influential factors; however, few studies have investigated urban flooding on a larger scale such as a metropolitan area.

Two-dimensional metallic tantalum disulfide as a hydrogen evolution catalyst.

Two-dimensional metallic transition metal dichalcogenides are emerging as prototypes for uncovering fundamental physical phenomena, such as superconductivity and charge-density waves, as well as for engineering-related applications. However, the batch production of such envisioned transition metal dichalcogenides remains challenging, which has hindered the aforementioned explorations. Herein, we fabricate thickness-tunable tantalum disulfide flakes and centimetre-sized ultrathin films on an electrode material of gold foil via a facile chemical vapour deposition route.

Microstructural Evolution of Dy₂O₃-TiO₂ Powder Mixtures during Ball Milling and Post-Milled Annealing.

The microstructural evolution of Dy₂O₃-TiO₂ powder mixtures during ball milling and post-milled annealing was investigated using XRD, SEM, TEM, and DSC. At high ball-milling rotation speeds, the mixtures were fined, homogenized, nanocrystallized, and later completely amorphized, and the transformation of Dy₂O₃ from the cubic to the monoclinic crystal structure was observed. The amorphous transformation resulted from monoclinic Dy₂O₃, not from cubic Dy₂O₃.

Loading CdZnS Quantum Dots onto Onion-Like Carbon Nanoparticles to Boost Photocatalytic Hydrogen Generation.

Carbon dots (C dots, size < 10 nm) have been conventionally decorated onto semiconductor matrixes for photocatalytic H evolution, but the efficiency is largely limited by the low loading ratio of the C dots on the photocatalyst. Here, we propose an inverse structure of CdZnS quantum dots (QDs) loaded onto the onionlike carbon (OLC) matrix for noble metal-free photocatalytic H evolution. CdZnS QDs (6.

Cobalt Oxide Porous Nanofibers Directly Grown on Conductive Substrate as a Binder/Additive-Free Lithium-Ion Battery Anode with High Capacity.

In order to reduce the amount of inactive materials, such as binders and carbon additives in battery electrode, porous cobalt monoxide nanofibers were directly grown on conductive substrate as a binder/additive-free lithium-ion battery anode. This electrode exhibited very high specific discharging/charging capacities at various rates and good cycling stability. It was promising as high capacity anode materials for lithium-ion battery.

Surface Roughening of Nickel Cobalt Phosphide Nanowire Arrays/Ni Foam for Enhanced Hydrogen Evolution Activity.

Development of earth-abundant, efficient, and stable electrocatalysts for hydrogen evolution reactions (HER) in alkaline or even neutral pH electrolyte is very important for hydrogen production from water splitting. Construction of bimetal phosphides via tuning the bonding strength to hydrogen and increasing effective active sites through nanostructuring and surface engineering should lead to high HER activity. Here, ternary NiCoP nanowires (NWs) decorated by homogeneous nanoparticles have been obtained on Ni foam for a highly efficient HER property via long-term cyclic voltammetric (CV) sweeping.

Tetra-primer ARMS PCR for rapid detection and characterisation of Plasmopara viticola phenotypes resistant to carboxylic acid amide fungicides.

Background: The occurrence of Plasmopara viticola populations resistant to carboxylic acid amide (CAA) fungicides is becoming a serious problem in the control of grapevine downy mildew worldwide. The resistance is caused by point mutations in the PvCesA3 gene. These isolates with this mutation have been detected mainly by determining the minimum inhibitory concentration of fungicides, which is always time consuming and inefficient.

Temperature-Mediated Selective Growth of MoS /WS and WS /MoS Vertical Stacks on Au Foils for Direct Photocatalytic Applications.

A growth-temperature-mediated two-step chemical vapor deposition strategy is designed to synthesize MoS /WS and WS /MoS stacks on Au foils. Predominantly A-A stacked MoS /WS and A-B stacked WS /MoS are selectively achieved and confirmed. Relative enhancements or reductions in photocatalytic activities of MoS /WS or WS /MoS are observed under illumination, because the type-II band alignment enables directional electron flow from electrode to active site.

Preparation and Photovoltaic Properties of Dye Sensitized Solar Cells Using ZnO Nanorods Stacking Films on AZO Substrate as Photoanode.

Three-dimensional stacking of ZnO nanorods on conducting aluminum-doped ZnO (AZO) glass were studied as efficient photoanodes of dye sensitized solar cells (DSSCs). By changing hydrothermal growth time and cycle times, the thickness of ZnO nanorods stacking films varied from 30 µm to 64 µm, and its influence on the energetic conversion efficiency of the DSSCs based on the stacking films photoanodes was investigated. The loading density of N719 on the surface of ZnO nanorods was studied to increase the efficiency of the cells.

Synthesis and photoelectrochemical response of CdS quantum dot-sensitized TiO2 nanorod array photoelectrodes.

A continuous and compact CdS quantum dot-sensitive layer was synthesized on TiO2 nanorods by successive ionic layer adsorption and reaction (SILAR) and subsequent thermal annealing. The thickness of the CdS quantum dot layer was tuned by SILAR cycles, which was found to be closely related to light absorption and carrier transformation. The CdS quantum dot-sensitized TiO2 nanorod array photoelectrodes were characterized by scanning electron microscopy, X-ray diffraction, ultraviolet-visible absorption spectroscopy, and photoelectrochemical property measurement.