Nanomaterials refer to particles with a size ≤100 nm. Their high surface-area-to-volume ratio enables them to adhere to surfaces in large quantities. Metal nanomaterials have many unique physical and chemical properties that other bulk common materials do not have. It has a wide range of application prospects in light, electricity, magnetism, catalysis, sensing, biomedicine, and so on.

Our inorganic and metallic nanomaterials can be used in a variety of applications, from sensors and solar cells to biomedical applications. They are available in a variety of sizes and shapes, such as nanorods, nanospheres, dispersions, nanopowders, and suspensions.

Inorganic nanoparticles

Inorganic nanoparticles, inorganic nanoparticles with a size in the range of 1−100 nm can be synthesized by physical or chemical methods. Inorganic nanoparticles have good biocompatibility, and non-toxicity, and can be obtained by surface functionalization. Dispersible nanoparticles for biomedical applications. Common ones are silicon dioxide, titanium dioxide, aluminum oxide, calcium carbonate, aluminum nitride, etc.

There are quite a few types of inorganic non-metallic nanometers. Such as nano-TiO2, Al2O3, ZrO2, etc., non-metal oxides, such as nano-SiO2. Metal hydroxides, such as nano-Co(OH)2, La(OH)3, etc., and metal sulfides such as Silver sulfide, tin sulfide, nano-nitrides, nano-nonmetals such as nano-B, C, Se, Si, etc. These inorganic non-metallic nanomaterials also have exotic properties. For example, in the process of hydrogenation of formaldehyde to methanol. Using nano-nickel powder and nano-TiO2, or SiO2 powder as catalyst and carrier respectively, can increase the selectivity by 5 times; the nano-TiO2 particle is also a stable non-toxic ultraviolet light absorber, which has anti-ultraviolet radiation for organic polymer materials, to prevent the stabilization of polymer chain degradation. Nano-ceramics are a strategic way to solve the brittleness of ceramics. Nano SiO2 powder is widely used, can be used to improve the toughness and smoothness of ceramic products, anti-aging agent of paint and plexiglass, reinforcing agent of rubber and plastic, etc. Nano-se is a newer selenium supplement after organic Se, with high biological activity. High safety index, high-tech content, high purity, high stability, etc. In 1998, it was designated as a health food by the Ministry of Health. Nano-selenium is a successful application of nanotechnology in the biological field. The nano-CaCO3 powder has a dual effect of strengthening and toughening organic polymers. It can also be widely used in coatings, plastics, paper, ink, paint, cosmetics, etc. In recent years, polymer/montmorillonite nanocomposites have emerged because of their excellent mechanical and thermal properties, as well as high gas barrier properties. Since its appearance, it has been widely concerned by scientists from all walks of life and has become a hot spot in the research of composite materials. It is one of the organic-inorganic nanocomposites with the most industrialization prospects.

Metal nanoparticles

Metal nanoparticles are prepared or modified with various chemical functional groups (e.g., gold, silver, iron) and can be widely used in a variety of applications in the fields of sensing, batteries, diagnostics, and therapeutics.

There are many kinds of nanometal materials. At present, the nanometal materials that have been successfully developed include nano-Ag, Cu, Ti, Fe, Co, Ni, Zn, Pd, Pf, Au, and so on. These nano-metal particles all have excellent properties that are unmatched by macroscopic metals. For example, the hardness and yield strength of nanocrystalline Cu or Ag are 50 times and 5 times higher than those of conventional materials, respectively. Making common metal catalysts such as Fe, Co, Ni, Pd, and Pt into nanoparticles can greatly improve the catalytic effect. The hardness of nano-metal Pd is 4-5 times higher than that of polycrystalline Pd on average, and the yield strength is 5 times higher.

According to the properties of nanomaterials, their application areas are as follows:

Mechanical properties: superhard, high-strength, high-toughness, superplastic materials, especially ceramic toughening and high-toughness, high-hard coatings;

Optical properties: optical fibers, light-reflective materials, absorbing stealth materials, optical nonlinear components, infrared sensors, photorefractive materials;

Manetic: magnetic memory, magneto-optical components, magnetic detectors, magnetic refrigeration materials, wave absorbing materials, cell separation, smart drugs;

Electrical properties: electrodes, superconductors, quantum devices, varistors, nonlinear resistors, electrostatic shielding;

Catalytic performance: catalyst;

Thermal properties: heat-resistant materials, heat-exchange materials, low-temperature sintering materials;

Sensitive characteristics: humidity, temperature, gas sensors;

Others: medicine, energy, environmental protection, combustion accelerants, flame retardants, polishing fluids, lubricants, etc.

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