Abstract: A method and apparatus for removing particles of an ion beam etching system. The ion beam etching system includes: a first grid configured to connect a positive voltage generated by a first DC power supply; a second grid configured to connect a negative voltage generated by a second DC power supply; a third grid configured to connect a positive voltage generated by a third DC power supply; a neutralizer located above the third grid and configured to generate electrons; and an air extraction hole located below the third grid and connected to a molecular pump. The first grid and the second grid are configured to accelerate plasma in a reaction chamber, and the third grid is located on a side of the second grid away from the first grid.

Abstract: Provided are novel neutralizing antibodies against spike protein of SARS-COV-2, and the antigen binding fragments thereof. Pharmaceutical composition and kits comprising the same, and the uses thereof are also provided.

Abstract: The present disclosure provides a negative electrode, a preparation method therefor, and an application thereof. In the process of preparing a negative electrode of the present disclosure, a graphite material is mixed with a graphene-coated silicon-oxygen material, and the graphene-coated silicon-oxygen material is prepared by means of spray drying. The present disclosure not only uses the advantages of graphite in cycle life and low-temperature capacity retention, but also makes full use of the advantages of the silicon-oxygen material, thereby reducing the areal density and compaction density of a negative electrode, thereby significantly improving the cycle life of a battery.

Abstract: Provided is a novel neutralizing antibody against spike protein of SARS-COV-2, and the antigen binding fragments thereof. Pharmaceutical composition and kits comprising the same, and the uses thereof are also provided.