Professor Shanghai Jiaotong University invented the "light scale" to weigh the weight of a single proton

Professor Shanghai Jiaotong University invented the "light scale" to be able to call out a single proton weight scale is a familiar thing. However, have you heard of "light scale"? Professor Zhuka of Shanghai Jiaotong University invented such a scale for “weighing” microscopic particles such as atoms and protons. It replaces the traditional electrical measurement with an all-optical method, and is considered by the American Physical Society as "promising to lead nanoscience into a new field of measurement." Professor Zhuka told reporters that with the rapid development of quantum information and quantum measurement technology today, The exploration of the singular world of quantum has become the unremitting pursuit of research scholars from various countries. He and his supervised Dr. Li Jinjin based on quantum optics and nanomaterials as the basis for their research, for the first time in the world, they proposed a nano-optical mass spectrometer, also known as an "optical scale", which can measure the quality of biological DNA molecules, chromosomes and neutral atoms. The quality of non-destructive high-precision optical measurement. Existing measurement methods cannot be accurate to the measurement of a single atom, but can only use a bunch of atoms as a unit of measurement for repeated measurements, and then estimate the mass of the atoms. So how to use "light scale" to measure the mass of an atom? Professor Zhuka introduced that placing the atoms to be measured on the surface of a carbon nanotube, and then illuminating the carbon nanotubes with two beams of different intensity at the same time, at this time, the absorption spectrum of the weak light can be detected to accurately obtain carbon nanotubes. The vibration frequency of the tube. We have to measure the vibration frequency of the carbon nanotubes two times in succession to obtain the amount of change in the vibration frequency of the carbon nanotubes before and after the atoms are inserted, and the mass of a single atom falling on the surface of the carbon nanotubes can be obtained by calculation. "Actually, there is no new aspect or principle in physics, but no one has ever considered such a scheme before." According to Zhuka's professor, the "light scale" controlled by all light has its sensitivity and The accuracy is nearly three orders of magnitude higher than traditional electrical mass spectrometers. The research on the measurement of a single neutral atom has come to an end. At present, Zhuka's team of professors is studying the measurement of a single proton or neutron through "light beam". They also hope to apply the "light scale" to the study of biological DNA molecules. According to reports, the quality of traditional cancerous DNA molecules should not be exactly the same as that of normal DNA molecules. Using high-precision "light" weighing, it may be possible to detect the presence of cancer cells earlier and more accurately.

Plush Pencil Case

Ningbo Vinny International Trading Co., Ltd , http://www.vinnystationery.com