Tunable Photocarrier Dynamics in CuS Nanoflakes under Pressure Modulation.

Two-dimensional materials with a unique layered structure have attracted intense attention all around the world due to their extraordinary physical properties. Most importantly, the internal Coulomb coupling can be regulated, and thus electronic transition can be realized by manipulating the interlayer interaction effectively through adding external fields. At present, the properties of two-dimensional materials can be tuned through a variety of methods, such as adding pressure, strain, and electromagnetic fields.

Charge Transfer Properties of Heterostructures Formed by Bi O Se and Transition Metal Dichalcogenide Monolayers.

Atomically thin bismuth oxyselenide (Bi O Se) exhibits attractive properties for electronic and optoelectronic applications, such as high charge-carrier mobility and good air stability. Recently, the development of Bi O Se-based heterostructures have attracted enormous interests with promising prospects for diverse device applications. Although the electrical properties of Bi O Se-based heterostructures have been widely studied, the interlayer charge transfer in these heterostructures remains elusive, despite its importance in harnessing their emergent functionalities.

Photocarrier Dynamics in MoTe Nanofilms with 2 and Distorted 1 Lattice Structures.

Molybdenum telluride (MoTe), an emerging layered two-dimensional (2D) material, possesses excellent phase-changing properties. Previous studies revealed its reversible transition between 2 and 1' phases with a transition energy as small as 35 meV. Since 1'-MoTe is metallic, it can serve as an electrical contact for semiconducting 2-MoTe-based optoelectronic devices.

Transient Absorption Microscopy of Layered Crystal AsSbS.

We introduce getchellite as a new layered material for fabrication of two-dimensional van der Waals materials and heterostructures. Nanofilms of AsSbS were fabricated by mechanical exfoliation. Transient absorption spectroscopy measurements identified a direct bandgap at about 710 nm, which is close to the ideal single-junction photovoltaic bandgap.

Epitaxial Cubic Silicon Carbide Photocathodes for Visible-Light-Driven Water Splitting.

Cubic silicon carbide (3C-SiC) material feature a suitable bandgap and high resistance to photocorrosion. Thus, it has been emerged as a promising semiconductor for hydrogen evolution. Here, the relationship between the photoelectrochemical properties and the microstructures of different SiC materials is demonstrated.

Ultrafast charge transfer in a type-II MoS-ReSe van der Waals heterostructure.

We fabricated a van der Waals heterostructure by stacking together monolayers of MoS and ReSe. Transient absorption measurements were performed to study the dynamics of charge transfer, indirect exciton formation, and indirect exciton recombination. The results show that the heterostructure form a type-II band alignment with the conduction band minimum and valance band maximum located in the MoS and ReSe layers, respectively.

Improving anti-infrared radiation and heat insulation by potassium hexatitanate whisker-doped AlO-SiO composite xerogel.

Taking potassium hexatitanate whisker (PTW) modified by silane coupling agent KH550, aluminium nitrate inorganic salt and tetraethyl orthosilicate and deionized water, respectively, as infrared sunscreen, aluminium source and raw materials forming the network structure of a composite xerogel, a series of structurally intact PTW-doped AlO-SiO composite xerogel thermal-insulating materials were prepared by the sol-gel method and dried under atmospheric pressure. The infrared spectral characteristics, infrared radiation transmittance, microstructures, morphology and thermal conductivity of different composite materials prepared have been determined by a Fourier transform infrared spectrometer, UV-visible-near-infrared spectrophotometer, X-ray diffractometer, scanning electron microscope and thermal conductivity tester. The results exhibit that when the Al to Si molar ratio is 1 : 9, the composite material with 5 wt% modified PTW shows the best infrared radiation blocking performance and the lowest thermal conductivity (0.

Historical Records and Source Apportionment of Polycyclic Aromatic Hydrocarbons Over the Past 100 Years in Dianchi Lake, a Plateau Lake in Southwest China.

Two sediment cores were collected from Dianchi Lake, a plateau lake in Southwest China, to study the temporal trends and to investigate the sources of sedimentary deposited polycyclic aromatic hydrocarbon. The ΣPAH16 concentration in the two sediment cores ranged from 172.5 to 2244.

A Novel Complementation Assay for Quick and Specific Screen of Genes Encoding Glycerol-3-Phosphate Acyltransferases.

The initial step in glycerolipid biosynthesis, especially in diverse allopolyploid crop species, is poorly understood, mainly due to the lack of an effective and convenient method for functional characterization of genes encoding glycerol-3-phosphate acyltransferases (GPATs) catalyzing this reaction. Here we present a novel complementation assay for quick and specific characterization of GPAT-encoding genes. Its key design involves rational construction of yeast conditional lethal ΔΔ double mutant bearing the heterologous gene whose leaky expression under repressed conditions does not support any non-specific growth, thereby circumventing the false positive problem encountered with the system based on the ΔΔ mutant harboring the native episomal gene whose leaky expression appears to be sufficient for generating enough GPAT activities for the non-specific restoration of the mutant growth.

Fluorescent Holographic Fringes with a Surface Relief Structure Based on Merocyanine Aggregation Driven by Blue-violet Laser.

Stability and integration are the goals for developing photonic devices. Spirooxazines have the property of photoinduced merocyanine-aggregation in polymer matrix, which can be applied to fluorescence emission and stable information storage. Although visible light coherent radiation with UV-assist has been used to achieve polarization-modulated holographic memory in spirooxazine doped PMMA films, the complexity of optical systems is increased and the aggregation ability of merocyanine is decreased.

Visible laser-assisted reduction of plasmonic Ag nanoparticles with narrow-band optical absorption for colored holographic reconstruction.

Noble metal plasmonic resonance has been utilized in optical data storage widely for its excellent photo-transformation efficiency. TiO nanoporous films deposited with Ag nanoparticles present outstanding polarization-response and color-modulation ability. However, the low exposure-sensitivity at single wavelength inhibits their application in optical information processing, which is urgent to be improved by innovative methods.

Nonvolatile plasmonic holographic memory based on photo-driven ion migration.

Stability of data storage is essential for optical information processing. TiO nanoporous films loaded with small-sized Ag nanoparticles thus attracted much attention due to their fast and polarization-sensitive photochemical response, which is able to realize optical phase modulation and high-density optical memory. However, little attention was given to the modulation of the silver ion migration, which plays a key role in anti-erasure of the recorded hologram.

Selective photo-oxidation induced bi-periodic plasmonic structures for high-density data storage.

Stable and controllable optical memory is necessary for the development of current information technology. In this context, Ag/TiO films have received much attention for their photosensitivity in wavelength and polarization, which can be applied to high-density optical storage. Here, we carried out dual-wavelength holographic recording using 403.

[Sedimentary Characteristics and Sources of Organic Matter in Sediments of Dianchi Lake].

Sediment columns in the southeast and east of Dianchi Lake were taken as the object of the study to determine ages by Pb dating method.The contents and sediment fluxes of total organic carbon (TOC) and -alkanes of the sediments were investigated,and organic sources were tracked according to the relevant indexes of -alkanes.The results indicated that TOC contents and sediment fluxes of two sampling sediments both presented an increasing trend on the whole;Sediment fluxes of -alkanes varied as three stages:increasing period,decreasing period and re-increasing period.

[Distribution Characteristics of -alkanes in Sediment Core and Implication of Environment in Different Lakes of Dianchi].

In order to study the composition and environment significance of the organic matter in Lake Dianchi, samples from two sediment cores from the northern and southern parts of the lake were collected in July, 2014. Meanwhile, the vertical distributions of total organiccarbon (TOC), total nitrogen (TN), -alkanes fractions were investigated. The results showed that ① the concentrations of TOC and TN had been clearly increasing since the 1970s, which implied that the primary productivity of Lake Dianchi was continuously enhanced; ② The values of the parameter -C/-C, and CPI indicated the alternation between herbs and woody plants from the bottom up in Lake Dianchi sediments.

Blu-ray-sensitive localized surface plasmon resonance for high-density optical memory.

Tunable spectrum-response is desired for efficient photo-energy transformation. Blu-ray (~405 nm) and polarization sensitive Ag/TiO nanocomposite films are thus fascinating in application of fast-response and high-density optical memory device. The Ag/TiO film has the ability of replicating hologram based on optical coherence by laser-stimulated dissolution of Ag nanoparticles (NPs).

The Clinical Relevance of Serum NDKA, NMDA, PARK7, and UFDP Levels with Phlegm-Heat Syndrome and Treatment Efficacy Evaluation of Traditional Chinese Medicine in Acute Ischemic Stroke.

According to the methods of Patient-Reported Outcome (PRO) based on the patient reports internationally and referring to U.S. Food and Drug Administration (FDA) guide, some scholars developed this PRO of stroke which is consistent with China's national conditions, and using it the feel of stroke patients was introduced into the clinical efficacy evaluation system of stoke.

The function and properties of the transcriptional regulator COS1 in Magnaporthe oryzae.

The conidiophore stalk-less1 (COS1) gene encodes a novel transcription factor in Magnaporthe oryzae, and mutation of COS1 (M2942) resulted in developmental failure of conidiophores. COS1 putatively encodes a 491-amino-acid protein, which contains four multiple adjacent C2H2-type zinc-finger domains. The motifs are homologous to the zinc-finger protein Azf1 of Saccharomyces cerevisiae.

Mesoporous zirconium phosphate from yeast biotemplate.

Mesoporous zirconium phosphate has attracted increasing interest due to its extraordinary functionalities. In particular, great progress has been made in the synthesis of mesoporous zirconium phosphate using traditional approaches. However, synthesis of mesoporous zirconium phosphate using yeast as biotemplate has not been well studied so far.