Trade News

The high precision isotope ratio analysis of ultramicro strontium samples can be realized by using silicotungstic acid as the emitter

Strontium isotope ratio (87Sr/86Sr) has been widely used in earth science, astrochemistry, environmental chemistry, food origin tracing, archaeology and other fields. Since the 1960s, the Thermoelectric ionization mass spectrometer (TIMS) has been regarded as the benchmark technique for ratio analysis of 87Sr/86Sr with excellent accuracy and high sensitivity. Excellent sensitivity is the prerequisite for the analysis of high precision 87Sr/86Sr ratio in ultramicro samples. The key to improve the sensitivity lies in the selection of suitable emitters to improve [...]

The resonance level improves the thermoelectric properties of germanium telluride

Recently, the team of Professor Zhang Wenqing, Institute of Materials Genome Engineering, Shanghai University, and Professor Jihui Yang, Department of Materials Science and Engineering, University of Washington (click to view the introduction) cooperated with the research team of GeTe thermoelectric materials, following the basic ideas of materials genome science, integrated material calculation, material preparation and material characterization. The first principle method is used to calculate the electron energy band and electron energy state density of GeTe high and low [...]

Vanadium dioxide — a revolutionary material for the future electronics industry

Because of its unique properties, vanadium dioxide has become an ideal choice to replace silicon for a new generation of low-power electronic devices. Swiss researchers recently demonstrated the application of vanadium dioxide to aerospace communications (600677) systems to achieve programmable rf electronics, highlighting the oxide’s potential. Vanadium dioxide has phase transition characteristics and forms that can be converted between an insulator and a metal, acting as an insulator at room temperature and as a metal conductor above 68 degrees Celsius. [...]

The coexistence of issing superconductivity and quantum Griffith singularity has been observed in a large area monolayer niobium disselenide crystal

Recently, professor wang and JiShuai hua, an associate professor at tsinghua university, member of qi-kun xue, Chen, a professor at Beijing university of Eva, a researcher at Feng Ji researcher, hefei strong magnetic field center Tian Mingliang researcher of Chinese Academy of Sciences, Dr XiChuanYing hai-wen liu and Beijing normal university associate professor and others, by molecular beam epitaxy of expiration of the double-layer graphene 6 h – SiC (0001) substrate successful preparation of large area above (mm) atomic [...]

The first nanometer niobium oxide production line in China was put into operation in phase I with an annual output of 100 tons

Source: powder circle ( – the circle of business and life of people in the powder industry! On April 26, shandong haiyan rare metal materials co., ltd. completed the first phase of the production line of rare metal special nano niobium oxide new material in China. After the production capacity reaches the standard, it can produce 100 tons of niobium nano-oxide material annually. Source: powder circle ( – the circle of business and life of people in the powder industry! There [...]

Hydroxyapatite-“Stand-in” for New Century Bone

Due to the effects of diseases, aging, and frequent traffic accidents, the number of cases of bone injury has increased year by year. According to statistics, there are 3 million orthopedic cases in China every year, so the demand for bone substitute materials is increasing. In recent years, bone substitute materials represented by hydroxyapatite have gradually become the darlings of clinical application. Hydroxyapatite is the main component of vertebrate bones and teeth, and has good biological activity and biocompatibility. Compared [...]

The technology of industrialized production of nanometer copper powder has developed by Chinese manufacturer

The bulk application of nanometer copper powder in the market is based on the cost. At present, the high cost cannot realize the mass application, and the reason for the high cost is that the industrial production of ordinary equipment cannot be realized. Therefore, the first problem we solved is to use ordinary conventional equipment to realize the industrial production of nanometer copper powder. If the cost problem is not solved, even the preparation of high purity, ultra-fineness, narrow [...]

The scientists obtained highly doped up-conversion nanoparticles

Led by Australia’s Macquarie university professor da-yong jin advanced cell instrument laboratory and engineering college of Beijing university department of biomedical engineering XiPeng research joint research, found the new nano photonics light-emitting mechanism, and implements the high concentration of doping on the conversion of nanoparticles (Upconversionnanocrystals) technology, which shows the most sensitive nano fluorescent material yet. The paper was published in Nature Nanotechnology. Upconversion nanoparticles, a novel fluorescent material, are promising a wide range of applications with their unique optical [...]

Laser technology opens up a new way to synthesize quantum dots

Recently, professor duhiwen’s team developed a new process for synthesizing monodisperse quantum dots, which is environmentally friendly and efficient. The results were published in Nature Communications, which is the world’s first report on synthesizing monodisperse quantum dots by physical method. Quantum dots, also known as semiconductor nanocrystals, are nanoparticles made up of ii-vi or iii-v elements. Quantum dot size, generally between 1 ~ 10 nm, due to the electrons and holes is strongly restricted in small volume, the quantum dot [...]

The institute of intelligence of Chinese Academy of Sciences introduced the up-conversion luminescent materials into SERS detection

Recently, researcher Yang liangbao and others of liu jinhuai research group of intelligent institute introduced up-conversion luminescent materials into surface-enhanced Raman spectroscopy (SERS) research, and realized the SERS detection with high sensitivity under long wavelength and low energy laser, which was of great significance to the application of SERS technology in practical detection. The results have been published in materials chemistry A and analysts of the royal society of chemistry. In recent years, SERS technology has attracted much attention due [...]