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Manganese dioxide (chemical formula: MnO2) is a black or brown solid, the most stable oxide of manganese, and is often found in pyrolusite and manganese nodules. Pylusite is the main mineral containing manganese; manganese nodules (submarine rock solids) also contain manganese. Manganese dioxide is mainly used to make dry batteries, such as carbon-zinc batteries and alkaline batteries; it is also ...
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The main uses of nanomaterials: pharmaceuticals, household appliances, electronic computers, and the electronic industry, environmental protection, textile industry, and machinery industry. Nanotechnology is the core technology in the development of automobiles. Nanotechnology can be applied from car bodies to wheels, covering almost all of cars. The widespread application of nanotechnology in aut...
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Nitrogen doped carbon nanotubes are a new type of nanomaterial with excellent physical and chemical properties, and have broad application prospects. First, nitrogen doped carbon nanotubes can be prepared by various methods, such as chemical vapor deposition, chemical vapor deposition arc discharge, electrochemical oxidation and reduction, sol gel method, etc. Among them, nitrogen doped carbon nan...
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Invisible material refers to a material that can reduce or eliminate the reflection of light on the surface of an object, making it invisible or reducing its visibility. The principles of commonly used stealth materials currently include the following: The principle of refractive index control: By utilizing the difference between the refractive index of the material and the refractive index of the...
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In recent years, the application of nanomaterials has received increasing attention. Nanomaterials have a larger specific surface area and submicron size, giving them chemical and physical properties that differ from macroscopic substances. The crystal structure of nanomaterials has a significant impact on their properties. Nanomaterials with different crystal forms have certain advantages in thei...
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Introduction: Nanotechnology is becoming increasingly important in many fields, from medicine to electronics. Nanomaterials, including nanoparticles, nanotubes, and nanowires, are essential components of many nanotechnology applications. Producing these materials requires specialized techniques, such as wet and dry methods. In this article, we will explore what dry and wet methods are, their benef...
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Quantum dots (QDs) refer to semiconductor nanoparticles with a size smaller than the Bohr radius of the exciton and exhibiting quantum confinement effects. Due to the quantum confinement effect, the fluorescence emission of quantum dots is related to their diameter and chemical composition. By compounding with semiconductor surfaces, their optical and photochemical properties can be enhanced. Trad...
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Synthesis of Carbon Quantum Dots The synthesis of carbon quantum dots can be mainly divided into two categories: top-down method and bottom-up method. Through the pre-treatment, preparation, and subsequent processing, carbon quantum dots can be controlled in size, passivated on the surface, doped with heteroatoms, and nanocomposites to meet the requirements. Top-down approach Top down method: lase...
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What are the surface modification methods for alumina powder? Aluminum oxide, a common material, is commonly used in the production of ceramics, coatings, catalysts, etc. However, in some applications, such as filling composite materials or preparing high-performance catalysts, surface modification of alumina is required to improve its performance and stability. This article will discuss the surfa...
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Carbon nanotubes (CNTs) reinforced aluminum composites with unique intragranular dispersion were obtained using ultra short carbon nanotubes, and nanoscale carbon nanotubes were uniformly distributed within ultrafine aluminum grains. Compared with typical CNT/Al composite materials with intergranular carbon nanotube dispersion, this intragranular carbon nanotube/aluminum composite material has str...
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1. Antibacterial agents and their classification Antibiotics refer to drugs that can inhibit bacterial growth, damage their living environment, and effectively and continuously exert their effects. Antibacterial agents are divided into two categories: organic antibacterial agents and inorganic antibacterial agents. Among them, organic antibacterial agents include natural and synthetic types, while...
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In recent years, with the rapid development of 3D printing technology, NiTi alloy powder has attracted much attention as a key raw material for biomedical implants. As the foundation of 3D printing, the quality of powder raw materials is crucial, and the plasma rotating electrode atomization method has attracted much attention. Preparation method of plasma rotating electrode The PREP method is use...
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