We discover that a large family of [PbF]- and [BiO]-based mixed-anion materials with a litharge-type structural unit are highly polarizable layered semiconductors in proximity to strain-induced ferroelectricity. First-principles calculations demonstrate that in this family of materials, compounds as diverse as PbFBr, BiOCl, BiCuOSe, BiOS, and BiOSCl exhibit static dielectric constants an order of magnitude higher than typical semiconductors. Additionally, they undergo a ferroelectric transition when subjected to a few percent of tensile strain.
View Article and Find Full Text PDFBackground: Named entity recognition is a fundamental task in natural language processing. Recognizing entities in biomedical text, known as the BioNER, is particularly crucial for cutting-edge applications. However, BioNER poses greater challenges compared to traditional NER due to (1) nested structures and (2) category correlations inherent in biomedical entities.
View Article and Find Full Text PDFVan der Waals (vdWs) materials are promising candidates for hetero-integration with silicon photonics toward miniaturization and integration. VdWs materials like molybdenum telluride and black phosphorus, despite being prominent, exhibit air sensitivity, and their room temperature emissions can be significantly broadened by tens of meV. Here, a self-encapsulation strategy is developed to scalably synthesize robust 2D vdWs ErOCl with sub-meV narrow emissions at the telecom C-band.
View Article and Find Full Text PDF2D materials with remarkable second-harmonic generation (SHG) hold promise for future on-chip nonlinear optics. Relevant materials with both giant SHG response and environmental stability are long-sought targets. Here, the enormous SHG from the phase engineering of a high-performance semiconductor, BiOSe (BOS), under uniaxial strain, is demonstrated.
View Article and Find Full Text PDFJ Phys Condens Matter
May 2024
Monolayer semiconductors with unique mechanical responses are promising candidates for novel electromechanical applications. Here, through first-principles calculations, we discover that the monolayer-TeO2, a high-mobility-type and environmentally stable 2D semiconductor, exhibits an unusual out-of-plane negative Poisson's ratio (NPR) when a uniaxial strain is applied along the zigzag direction. The NPR originates from the unique six-sublayer puckered structure and hinge-like Te-O bonds in the 2D-TeO2.
View Article and Find Full Text PDFBackground: Few studies have simultaneously compared the predictive value of various frailty assessment tools for outcome measures in patients undergoing gastrointestinal cancer surgery. Therefore, it is difficult to determine which assessment tool is most relevant to the prognosis of this population.
Aim: To investigate the predictive value of three frailty assessment tools for patient prognosis in patients undergoing gastrointestinal cancer surgery.
Phys Chem Chem Phys
November 2023
Intrinsic one-dimensional (1D) helix chain materials are extremely rare in inorganic chemistry due to their novel structural features and complex syntheses. Herein, we report a class of inborn 1D helix chains, namely 1D SbSX (X = Cl, Br, I), that can exist stably. Through calculations, we demonstrate that the formation of this helical feature is facilitated by the lone pairs in antimony atoms.
View Article and Find Full Text PDF-FeOOH nanorods were prepared via the urea hydrolysis process with the average length of 289.1 nm and average diameter of 61.2 nm, while magnetic-FeO/FeOheterostructure nanorods were prepared via the urea calcination process with-FeOOH nanorods as precursor, and the optimum conditions were the calcination temperature of 400 °C, the calcination time of 2 h, the-FeOOH/urea mass ratio of 1:6.
View Article and Find Full Text PDFThe CYP2C19*2 gene carriers and non-carriers are closely related to the dosage of clopidogrel. To correctly guide the use of clopidogrel and promote individualized therapy, an ultra-sensitive electrochemical biosensor was developed for the detection of CYP2C19*2 gene. The heterogeneous α-FeO/FeO nanosheets were prepared via the hydrothermal-calcination process, and the preparation parameters were optimized.
View Article and Find Full Text PDFPhase engineering by strain in 2D semiconductors is of great importance for a variety of applications. Here, a study of the strain-induced ferroelectric (FE) transition in bismuth oxyselenide (Bi O Se) films, a high-performance (HP) semiconductor for next-generation electronics, is presented. Bi O Se is not FE at ambient pressure.
View Article and Find Full Text PDFMagnetic FeO nanoparticles were prepared via a simple hydrothermal method and utilized to load paclitaxel. The average particle size of FeO nanoparticles was found to be 20.2 ± 3.
View Article and Find Full Text PDFA label-free electrochemical aptasensor based on magnetic α-FeO/FeO heterogeneous hollow nanorods was developed for the detection of cancer antigen 125 (CA125). Magnetic α-FeO/FeO heterogeneous hollow nanorods were successfully prepared by the hydrolysis-calcination method, functionalized with polyethyleneimine (PEI), and modified with HAuCl to form magnetic α-FeO/FeO-Au nanocomposites with a layer of 5 nm gold nanoparticles (Au NPs) on the surface. The magnetic α-FeO/FeO-Au nanocomposites were used to fix the DNA-aptamer probe to amplify the current signal.
View Article and Find Full Text PDFIn this work, the magnetic α-FeO/FeO heterogeneous nanotubes were successfully prepared by solvent hydrothermal-controlled calcination method. The effects of additive concentration, hydrothermal temperature and time on morphology of products were investigated. The α-FeO/FeO nanotubes with a saturation magnetization of 50 emu/g were prepared calcinated at 600 °C for 4 h using 0.
View Article and Find Full Text PDFHigh-mobility layered semiconductors have the potential to enable the next-generation electronics and computing. This paper demonstrates that the ultrahigh electron mobility observed in the layered semiconductor BiOSe originates from an incipient ferroelectric transition that endows the material with a robust protection against mobility degradation by Coulomb scattering. Based on first-principles calculations of electron-phonon interaction and ionized impurity scattering, it is shown that the electron mobility of BiOSe can reach 10 to 10 cm V s over a wide range of realistic doping concentrations.
View Article and Find Full Text PDFOn account of the high theoretical capacity and preferable electrochemical reversibility, tin selenides have emerged as potential anode materials in the field of sodium ion batteries (SIBs). Unfortunately, the large volume changes, low electrical conductivity, and shuttling effect of polyselenides have impeded their real application. In this work, we present a spatially confined reaction approach for controllable fabrication of SnSe spheres, which are embedded in polydopamine (PDA)-derived N, Se dual-doped carbon networks (SnSe@NSC) through a one-step carbonization and selenization method.
View Article and Find Full Text PDFJiangzhi Granule is a commonly used traditional Chinese medicine for treating non-alcoholic fatty liver disease. However, its key ingredients and underlying mechanisms for attenuating nonalcoholic steatohepatitis (NASH) remain unclear. To address this issue, UPLC-TOF-MS based chemical profiling, network pharmacology and animal experimental validation were employed.
View Article and Find Full Text PDFEvid Based Complement Alternat Med
June 2021
Alcoholic liver disease (ALD) is a liver disease caused by long-term alcohol consumption. ROS-mediated oxidative stress is the leading cause of ALD. Pien-Tze-Huang (PZH), a traditional formula, is famous in China.
View Article and Find Full Text PDFAccording to the operative characteristics, the stimulated site and the curative effect-emerged site of bloodletting therapy, its clinical characteristics may be divided into three categories: a) local stimulation induced focus-local effect, b) local stimulation induced effect of the distal target organ (point-to-point distal effect), and c) special point stimulation induced broader effect of the whole body. Accordingly, the underlying mechanisms of clinical outcomes mainly involve the improvement of the local microcirculation and secondary changes of inflammatory substances for the first category (local focus). The point-to-point distal effect might mainly involve the innervation of nerve segments, while the broad effect of specific acupoint stimulation might involve multiple levels of the neuro-endocrine-immune system.
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