Alfa Chemistry Blog

Quantum dots , also known as semiconductor nanocrystals, are nanoscale materials composed of a small number of atoms. The number of atoms in a quantum dot is usually between a few and a few hundred, and their size in all three dimensions are less than 100 nm. The movement of carriers in the three dimensions of quantum dots is limited by the size effect. Due to the quantum confinement effect, the energy levels of carriers in quantum dots are similar to those of atoms having a discontinuous energy level structure, so quantum dots are also called artificial atoms. Due to their special energy level structure, quantum dots exhibit unique physical properties. This paper mainly discusses some properties of quantum dots, including quantum confinement effect, quantum size effect, surface effect and luminescence property. Quantum confinement effect Generally, the smaller the volume, the greater the bandwidth, so the optical and electrical properties of the quantum dots are highly dependent on th...

H istory of Development As early as 1985, the discovery of fullerene with the “football” structure immediately attracted the world’s attention. Then, carbon nanotubes with a hollow cylindrical structure are formed based on mild modifications toward fullerenes. In 1991, Japanese researchers discovered carbon nanotubes in carbon fibers for the first time. In 2004, researchers discovered the 2D planar nanomaterial whose planar thickness is confined to the nanoscale range. At the same time, researchers also developed a practical “scotch tape” technique to separate single-layer graphene from bulk graphene. Buckyballs (fullerenes), carbon nanotubes, and graphene all belong to a large family of carbon allotropes. Meanwhile, their structural differences make these nano-allotropes exhibit diverse but unique properties and great application potential. Carbon Nanomaterials Open Up New Opportunities For nearly forty years, carbon nanomaterials, such as fullerenes   (0D), carbon nanotubes ...

Carbon nanomaterials are a novel class of materials widely used in biomedical fields. In addition to CVD graphene, graphene series and graphene-like materials that were previously launched, Alfa Chemistry announces in a recent statement that now a large varieties of other carbon nanomaterials, such as carbon nanotubes and carbon nanofibers, are also readily obtainable. It should be noted that Alfa Chemistry has risen to be a reliable source for many novel materials, especially in recent years after its management made the decision to prioritize customer’s needs and satisfy their purchasing requirements. The multiple carbon series materials newly launched by Alfa Chemistry include the following: Carbon Nanotubes Bulk nanotubes are popular in the manufacturing of composite materials, such as wind turbines, bicycle parts, marine coatings, and even various sports vehicles and equipment. Customers can choose different specifications of carbon nanotubes, either arrays or sheets, either singl...