Articles

Properties and application prospects of ferric oxide nanometer powders

gas-sensitive characteristics and applications Due to surface effect, when the environment changes, the ion valence state of particle on the surface or interface and electronic changes with the change of external environment, can be made sensitive sensors, nanometer alpha Fe2O3 studies have found that they have a good of flammable or toxic gas detection of gas sensitive properties, used for hydrogen, ethanol, carbon monoxide and other toxic gas detection. Zhang et al. [9] studied the sensing characteristics of ethanol with [...]

Preparation method of nanometer ferroferric oxide Fe3O4 particles

The development of nanotechnology has opened up a new field for the research of various materials. Nowadays, a variety of nanomaterials have been fully applied in the field of autocorrelation, and the value of nanomaterials has been fully affirmed. Therefore, the development of new nanomaterials has become a necessity of modern society, with great development prospects. Nanometer Fe3O4 has the characteristics of small particle size, high specific surface area and magnetic sensitivity. It has been widely applied in the [...]

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 [...]

Crystal ferrocene has a wide range of applications and excellent practical results

Crystal ferrocene is a kind of burning rate catalysts, appearance is orange spicules, ferrocene in the powder and the latest crystalline morphology, crystalline in nature and the powder is the same, but in actual use crystal ferrocene can solve the problem of powder of ferrocene fly powder, reduce the unnecessary loss, and crystalline ferrocene dissolved more thoroughly, the effect is better. Ferrocene is also known as ferrodicyclopentadiene. The boiling point is above 200 degrees Celsius, the melting point is [...]

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 [...]

How to make hexagonal boron nitride powder

Boron nitride is a new ceramic material with excellent properties and great development potential. Hexagonal boron nitride (h-bn) is an isomer of boron nitride. The structure of hexagonal boron nitride is similar to that of graphite, with a hexagonal layered structure, soft texture, strong workability, and white color, commonly known as “white stone ink”. The following to introduce the commonly used method of making powder of hexagonal boron nitride. 1. Chemical vapor deposition (CVD) method. H-bn powder is generally prepared by [...]

Technology and principle of industrial extraction of vanadium pentoxide

The main raw materials for industrial extraction of vanadium pentoxide are vanadite-containing coal mines and vanadium titanomagnetite. The grade of vanadium pentoxide in vanadite-containing coal mines is generally 0.5-1.5%, and vanadium titanomagnetite is vanadium pentoxide Grade is generally between 1.0 and 5.0%. Mineral decomposition There are two kinds of decomposition methods of vanadium ore, the first is sintering method, the pulverized ore powder mixed with soda ash or sodium salt and sintered at high temperature, so that the low-priced vanadium oxidized and [...]

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 [...]

Upconversion nanoparticles convert infrared light into ultraviolet and visible light

Researchers from the department of bioengineering at the national university of Singapore’s school of engineering have developed a new technique that can convert infrared light into ultraviolet and visible light using nanoparticles, paving the way for non-invasive treatments for deep tumors, physicists group reported. The technique, which claims to inhibit tumor growth and control gene expression, is the world’s first non-invasive photodynamic therapy to treat deep tumors with nanoparticles. The paper appears in a recent issue of the journal [...]