Midget cave spiders (Araneae, Leptonetidae) from Jiangxi and Fujian Province, China.

Eleven leptonetid species belonging to four genera collected in Jiangxi and Fujian Provinces, China are presented. Ten new species of midget cave spiders from southern China are diagnosed, described, and illustrated: Yao & Liu, , Yao & Liu, and Yao & Liu, from Jiangxi; Yao & Liu, , Yao & Liu, , Yao & Liu, , Yao & Liu, , Yao & Liu, , Yao & Liu, , and Yao & Liu, from Fujian. Furthermore, (Yin, Wang & Wang, 1984) is recorded from Jiangxi province for the first time.

Three new species of Thorell, 1897 (Araneae, Phrurolithidae) from South China.

Three new species were collected from Jiangxi Provinces, China during a survey of the spider fauna of the region: Liu, (♂♀), Liu, (♂♀), and Liu, (♂♀). All species are described and illustrated with photographs and SEM micrographs, and their distribution is also mapped.

A new species of Strand, 1906 (Araneae, Zodariidae) from South China.

Background: Only one zodariid species, Yu & Chen, 2009 was found from Jiangxi Province. No other species have been recorded from this Province.

New Information: A new species, is described from Jiangxi Province, China.

Description of two new species of the genus Jin & Zhang, 2020 (Araneae, Corinnidae) from southern China.

Two new species of Jin & Zhang, 2020 (Araneae: Corinnidae) from Jiangxi Province, China are described here: (♂♀) and (♂). Detailed descriptions and photographs of the new species are provided.

A new species of Simon, 1897 (Araneae, Trachelidae) from South China.

Background: Only one trachelid species, Chen, Peng & Zhao, 1995 has been recorded from Jiangxi Province to date.

New Information: A new species, Liu, , is described from Jiangxi Province of China, based on both sexes. Morphological illustrations are provided and its distribution is mapped.

Pressure-Induced Structural Phase Transition, Anomalous Insulator-to-Metal Transition, and n-p Conduction-Type Switching in Defective, NiAs-Type CrTe.

CrTe, as a unique series of defective compounds with a NiAs-type structure and periodic metal vacancies, has attracted intensive research interest because of its diversity in structure and property dependent on the tunable stoichiometric ratio. Another feature of these compounds is their ability to switch between NiAs- and MnP-type structures, in which there often exist composition-, temperature-, or pressure-induced phase transitions accompanied by intriguing physical property switching. Herein, we report the syntheses of a series of CrTe compounds with similar compositions but distinct crystal structures, their phase transitions, anomalous transport, and photoelectric conduction behaviors under high pressure (HP).

Pressure-Driven Two-Step Second-Harmonic-Generation Switching in BiOIO.

Materials with multi-stabilities controllable by external stimuli have potential for high-capacity information storage and switch devices. Herein, we report the observation of pressure-driven two-step second-harmonic-generation (SHG) switching in polar BiOIO for the first time. Structure analyses reveal two pressure-induced phase transitions in BiOIO from the ambient noncentrosymmetric phase (SHG-high) to an intermediate noncentrosymmetric phase (SHG-intermediate) and then to a centrosymmetric phase (SHG-off).

Controllable Syntheses, Crystal Structure Evolution, and Photoluminescence of Polymorphic Zirconium Oxyfluorides.

Precise synthesis of polymorphic phases with similar components but distinct crystal structures is one of the key problems in inorganic chemistry. In this work, we report a fluorination method adopting ZrO as the starting material and NHF as the fluoridation agent that can afford multiphases in the Zr-O-F system, including ZrOF, ZrOF, ZrOF, ZrOF, β-ZrF, NHZrF, and NHZrF. A preliminary phase formation diagram was established as a function of the fluorination temperature (), reaction time (), and F/Zr ratio after systematic optimization of the preparation conditions.

Pressure-Induced Phase Transition, Jahn-Teller Suppression, Optical and Electronic Property Evolutions in Ruddlesden-Popper Perovskites Rb CuCl Br.

Transition-metal containing halides with Ruddlesden-Popper (RP) perovskite structures have received extensive attention owing to their emerging and anisotropic photoelectric functionalities. Among them, A CuX (A=alkali metal or organic cations, X=Cl, Br, I) series are particular, because of the Jahn-Teller distortion of Cu sensitive to external stimuli such as temperature and pressure. In this article, we report the structure evolution and physical property responses of RP perovskites Rb CuCl Br (x=1, 2) to external pressure.

Pressure-Driven Sequential Lattice Collapse and Magnetic Collapse in Transition-Metal-Intercalated Compounds FeNbS.

Volume collapse under high pressure is an intriguing phenomenon involving subtle interplay between lattice, spin, and charge. The two most important causes of volume collapse are lattice collapse (low-density to high-density) and magnetic collapse (high-spin to low-spin). Herein we report the pressure-driven sequential volume collapses in partially intercalated FeNbS ( = 1/4, 1/3, 1/2, 2/3).

Site-Specific Pressure-Driven Spin-Crossover in LuScFeO.

Pressure-driven spin-crossover (PSCO) is a collective quantum phenomenon frequently observed in transition-metal-based systems. According to the crystal-field theory, PSCO highly depends on the surrounding coordination environment of a given magnetic ion; nevertheless, it has never been verified experimentally up to now. Herein, we report the observation of a site-specific PSCO phenomenon in LuScFeO, in which octahedrally coordinated Fe in orthorhombic LuFeO and trigonal-bipyramidally coordinated Fe in hexagonal LuScFeO show distinct PSCO response to external pressure.

Urchin-Like NiCo(CO)(OH)·0.11HO for High-Performance Supercapacitors.

Here, we report our finding in the fabrication of novel porous urchin-like NiCo(CO)(OH)·0. 11HO (denoted as NC) nanomaterial composed of numerous nanoneedles through an one-step hydrothermal method, which deliveres a high specific capacity of 318 C g at a current density of 1 A g. Moreover, an architectural composite electrode consisting of the porous NC nanoneedles wrapped by reduced graphene oxide (rGO) nanosheets exhibits large specific capacity (431 C g at 1 A g), high rate capability and long cycling life (94% capacity retention after 5,000 cycles at 20 A g).

In-Situ Growth of NiAl-Layered Double Hydroxide on AZ31 Mg Alloy towards Enhanced Corrosion Protection.

NiAl-layered double hydroxide (NiAl-LDH) coatings grown in-situ on AZ31 Mg alloy were prepared for the first time utilizing a facile hydrothermal method. The surface morphologies, structures, and compositions of the NiAl-LDH coatings were characterized by scanning electron microscopy (SEM), three dimensional (3D) optical profilometer, X-ray diffractometer (XRD), Fourier transform infrared spectrometer (FT-IR), and X-ray photoelectron spectroscopy (XPS). The results show that NiAl-LDH coating could be successfully deposited on Mg alloy substrate using different nickel salts, i.