Superconductivity from buckled-honeycomb-vacancy ordering.

Vacancies are prevalent and versatile in solid-state physics and materials science. The role of vacancies in strongly correlated materials, however, remains uncultivated until now. Here, we report the discovery of an unprecedented vacancy state forming an extended buckled-honeycomb-vacancy (BHV) ordering in IrSb.

Rapid one-pot synthesis of LiMPO4 (M = Fe, Mn) colloidal nanocrystals by supercritical ethanol process.

We report a rapid one-pot supercritical fluid approach to prepare the desired size and morphology controlled LiMPO(4) nanocrystals, using oleylamine as both capping and reducing agent.

Rapid and direct conversion of graphite crystals into high-yielding, good-quality graphene by supercritical fluid exfoliation.

Graphene has attracted a great deal of attention in recent years due to its unusual electronic, mechanical, and thermal properties. Exploiting graphene properties in a variety of applications requires a chemical approach for the large-scale production of high-quality, processable graphene sheets (GS), which has remained an unanswered challenge. Herein, we report a rapid one-pot supercritical fluid (SCF) exfoliation process for the production of high-quality, large-scale, and processable graphene for technological applications.

Fabrication of MnOOH nanorods on a substrate in an oxygen bubbled solution with superhydrophobic properties.

A leaning MnOOH nanorod film is fabricated on a substrate by a simple method using only manganese acetate, water and oxygen. The use of dissolved oxygen results in the fabrication of a leaning MnOOH nanorod film by control of the supersaturation ratio during chemical bath deposition. The resultant film with a coating of fluoroalkyltrimethoxysilane (FAS) shows high water and oil repellency.

One-step synthesis of nano-micro chestnut TiO2 with rutile nanopins on the microanatase octahedron.

The solution synthesis of large single crystals of octahedron-like anatase TiO2 is reported, although this novel result is unexpected in the light of reported theoretical calculations. Moreover, systematic control of the crystal growth of rutile nanopins on the microanatase octahedron single crystal results in a nano-micro chestnut-like TiO2 structure. The control of the formation of rutile nanopins on the large single crystals of anatase in the same solution is an interesting and useful technique, based on thermodynamics and surface chemistry.

Synthesis of a perpendicular TiO2 nanosheet film with the superhydrophilic property without UV irradiation.

A method was developed for preparing perpendicular TiO2 nanosheet films from titanate nanosheet films produced on a titanium metal sheet by hydrothermal treatment with aqueous urea. The method is based on the consideration of some important points relating to the thermodynamics of nucleation and crystal growth. The resulting anatase TiO2 nanosheet films showed a specific superhydrophilicity without the need for any prior UV irradiation.

Synthesis of one-dimensional sodium titanate nanostructures.

We synthesized sodium titanate nanotubes and nanowires using TiB2 and TIN as the starting materials, respectively in a hydrothermal process. The experimental results indicate that the reaction temperature influences the morphology of the product significantly. The nanowires were formed above 170 degrees C.

Incorporation of glucose oxidase into Langmuir-Blodgett films based on Prussian blue applied to amperometric glucose biosensor.

Glucose oxidase (GOx) was immobilized in the organic-inorganic Langmuir-Bldogett (LB) films consisting of octadecyltrimethylammonium (ODTA) and nanosized Prussian blue (PB) clusters. The amperometric glucose biosensors based on the LB films were fabricated and tested. It was found that the sensors exhibited a clear response current under an applied voltage of 0.

Synthesis of tubular titanate via a self-assembly and self-removal process.

Novel morphology titanate tubes were successfully synthesized via a self-assembly and self-removal process. After the product was treated by calcinating and washing, crystalline TiO2 tubes were obtained. In this study, two new concepts are applied to design the synthetic route: (i) titanium glycolate rods obtained from an ethylene glycol-mediated process and titanate sheets synthesized using the hydrothermal process were used as the template and the precursor, respectively, and ii) the template was directly removed in the reaction without posttreatment.

Hexagonally ordered mesoporous ternary Li2O-TiO2-P2O5 oxides with high lithium content.

Hexagonally ordered mesoporous Li2O-TiO2-P2O5 oxides with high lithium content have been synthesized using surfactant-templated self-assembly; this ternary oxide has been specifically designed to yield a variety of mesoporous frameworks including a nanocomposite, amorphous multicomponent oxide, and almost fully nanocrystalline anatase.

Effect of tin addition on mesoporous silica thin film and its application for surface photovoltage NO2 gas sensor.

Self-ordered and structure-controlled transparent films of tin-modified mesoporous silica (Sn/Si ratio of 0.5-3%) were first prepared using a molecule surfactant template method employing spin coating. A surface photovoltage (SPV) NO(2) gas sensor was then fabricated using these self-ordered tin-modified mesoporous silica thin films based on a metal-insulator-semiconductor structure.