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Chinese scholars successfully developed "shockproof" atomic resolution microscope
[ Instrument R&D ] Before the microscope was developed, people could only use the naked eye or a handheld lens to observe the world. After the microscope appeared, people discovered hundreds of new tiny animals and plants, and learned from The internal structure of everything from the human body to plant fibers. Not only that, the microscope also plays an active role in helping the Academy of Sciences discover new species and help doctors treat diseases.
The invention of the microscope has opened a new microcosm, which not only contributes to the progress of various experiments and scientific research, but also promotes the improvement of related scientific and technological levels, but with the continuous progress and development of scientific technology and scientific research, the higher Resolution, higher signal-to-noise ratio, etc. are also new requirements for microscopes in various scientific studies. Therefore, in order to satisfy various scientific experiments, many researchers have joined the ranks of developing new microscopes.
A team of Lu Qingyu researchers from the Hefei Institute of Material Science, Chinese Academy of Sciences has long been committed to the development of microscopes under harsh conditions, and has developed a variety of high-rigidity and stable compact piezoelectric motors suitable for atomic resolution imaging in harsh vibration environments in narrow spaces. , And used it to build a variety of harsh conditions atomic resolution scanning tunneling microscope. The research results have been published in the internationally renowned academic journals "Ultramicroscopy" and "Review of Scientific Instruments".
It is reported that the microscope developed by the Lu light uranium team, then processed with sapphire insulation material, has an outer diameter of only 8.8 mm, and can be directly inserted into the aperture of the hybrid magnet and vacuum-sealed. After testing, this atomic resolution scanning tunneling microscope can obtain high-quality atomic resolution images of graphite in a vacuum environment under a super-magnetic field of 30 Tesla hybrid magnets. In order to observe the living organisms, through further in-depth research, the team of Chen Qingyu successfully built a set of anti-pollution scanning tunneling microscopes at room temperature and atmospheric environment, and after testing, they can mix from 27.5 Tesla Atomic resolution imaging is achieved under the super-strong magnetic field of the magnet.
In fact, China has built a major scientific and technological basic equipment "steady-state strong magnetic field experimental device" in 2017, and has three water-cooled magnets with field strengths that set world records and the second-ranked hybrid magnets, but due to the operation of hybrid magnets The strong vibration interference generated in the process can only be used to carry out macro-scale observations, it is difficult to achieve micro-scale observations, and it is difficult to stabilize the observation of atoms.
The invention of the Lu light uranium team achieved high-quality atomic resolution images in a strong vibration environment. It is believed that with the widespread use of the microscope, the experimenters can better discover new phenomena and promote new technologies.
Reference source: Hefei Institute of Material Science, Chinese Academy of Sciences, Baidu Encyclopedia