Researchers at the University of North Carolina at the United States have discovered that the "fluffy" nature of gold nanoparticle ligands is actually used to determine the size of synthetic nanoparticles, ie, large bulkiness, small nanoparticles, low bulkiness, and nanoparticle Bigger.

Gold Nano is widely used in industrial chemical processing, medicine, and electronics. When synthesizing gold nanoparticles, researchers often use an organic molecule called a "ligand" to facilitate this process because ligands can effectively concentrate gold atoms together to produce nanometers. particle. In this process, the ligands are arranged one after the other and surround the gold nanoparticles in all directions.

Researchers at the University of North Carolina have specifically selected three types of thiol ligands to determine whether the "fluffy" of the ligand affects the size of the resulting gold nanoparticles. Body) to observe. First, they bind these ligands around gold nanoparticles and then draw a picture of the gold nanoparticle structure formed by each ligand. As can be seen from the picture, the gold atoms are surrounded by ligands and the aligned ligands spread out to the periphery. As these three ligands have different bulky sizes, the picture shows that the bulkier ligand has its core gold nanoparticles pressed smaller; the less bulky ligand, the core gold nanoparticles Larger; no bulky ligand surrounds the largest gold nanoparticles.

One of the project leaders, Joseph Tracy, assistant professor of materials science and engineering at the University of North Carolina, said: "This study has enhanced our understanding of nanoparticle formation and enabled us to control the size and properties of gold nanoparticles. The researchers believe that the discovery has found an effective tool to control the size of synthetic gold nanoparticles. This tool is also an effective way to control the size of other nanoparticles and to synthesize smaller nanoparticles for the future. Open up new ways.

The research results were published in the latest issue of the American Society for Chemicals online version of ACS Nano. (Reporter Tian discipline)

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