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.
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. Traditional quantum dots are mostly composed of heavy metal elements. Although their excellent performance has been widely used in fields such as biological imaging, electrochemistry, and energy conversion, heavy metal elements can cause environmental pollution and affect the health of organisms.
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Graphene is currently one of the most popular materials for research. It has many excellent characteristics, such as high conductivity, high thermal conductivity, good mechanical properties, etc. Recently, quantum dots made of graphene have also attracted widespread attention. Graphene quantum dots are regarded as important materials for the next generation of optical, electrical, and energy storage devices, and have attracted attention due to their excellent performance advantages in various applications. This article will introduce the properties, synthesis, and applications of graphene quantum dots.
Silicon dioxide powder is widely used in various industrial fields due to its unique properties. However, as a powder, it suffers from drawbacks such as low reactivity, poor dispersion, and low surface energy. Surface modification is a way to improve the properties of silicon dioxide powder and enhance its performance in various applications. In this article, we will discuss a surface modification method for silicon dioxide powder using a silane coupling agent and its effect on the properties of silicon dioxide powder.
SAT NANO is a leading supplier of high-quality nanoscale zinc oxide powder. Our products come in two sizes, 10-20 nm and 30 nm. Besides, we have recently developed an innovative surface modification method that improves the stability and dispersibility of our nanoscale zinc oxide powder. This method is effective in converting the surface of the powder from hydrophilic to hydrophobic, thus reducing the agglomeration of particles and enhancing their performance in various applications.
