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New Raman spectroscopy breakthrough promises scientists to develop new micromaterials
[ Instrument network instrument research and development ] It is understood that the Raman spectrum is a C..V. Raman experiment in 1928 found that when light passes through a transparent medium and is scattered by molecules, the frequency changes. This phenomenon is called Raman scattering. It was later observed in the Soviet Union and France. Raman spectroscopy is a type of scattering spectrum. C..V. Raman analyzes the scattering spectrum with a frequency different from the incident light to obtain molecular vibration and rotation information, and is an analytical method applied to the study of molecular structure. Raman scattering is the inelastic scattering caused by the interaction between the vibration of molecules, the excitation of optical phonons in solids, and laser light.
Japanese scientists have developed a new Raman spectroscopy method that enables researchers to analyze the chemical composition and structure of metal particles with a diameter of only 0.5-2 nanometers, according to a recent report by the Physicists' Organization Network. This breakthrough is expected to enable scientists to develop new micromaterials, which are widely used in electronics, biomedicine, chemistry and other fields. Metal nanoparticles have a wide range of potential application prospects and are becoming the "xiangxiang" in modern research fields. Researchers have been able to develop metal nanocrystals with a diameter of only 0.5-2 nanometers (one nanometer is one billionth of a meter). These small particles are called "sub-nanometer clusters" (SNC) and have very unique characteristics.
In the research, the Japanese team worked to improve the performance of a specific Raman spectroscopy, surface enhanced Raman spectroscopy. They said that adding gold / silver nanoparticles encapsulated in a thin shell of inert silica to the sample could amplify the light signal of the sample, thereby increasing the sensitivity of the technology. To test this finding, they measured the Raman spectrum of tin oxide SNC and found new findings that explain why tin oxide SNC has such a high degree of chemical catalytic activity-it is related to its atoms.
Nowadays, science and technology are more developed, and more and more high-tech products have appeared in people's lives. The research of new Raman spectroscopy has found that it is believed to expand the application of sub-nanometer materials in various fields such as biosensors, electronics and catalysts. Scope matters. And these cannot be separated from the help of science and technology.
Source: China Science News, Encyclopedia