A method of laser liquid phase ablation test using laser liquid phase ablation system

Abstract

The invention discloses a method of carrying out a laser liquid phase ablation test by using a laser liquid phase ablation system. A whole test process is controlled once by a computer. An experimental device is constituted by a laser, an ablation optical path, an ablation cavity, a vacuum drying cavity, a TEM observation cavity, a target control system, and a TEM sample conveying system. Ablation liquid is prepared, and an ablation target is prepared, and the moving path, the turning sequence, and the turning time parameter of the target are set in the control computer, and thereafter the working parameters of the laser are set, and then an ablation mode is selected, and in addition, the laser is started for the ablation test, and after drying, the target is conveyed to the TEM observation cavity for TEM observation, and at the same time, the interested position of the TEM observation is recorded, a TEM copper wire mesh is conveyed back to the ablation cavity by controlling a TEM sample conveying system, and observation is repeated. Experiment is carried out automatically, efficiency is high, and control is accurate, and in addition, pollution and oxidation of samples are prevented, and tests can be carried out at an original position.

Description

technical field [0001] The invention relates to the field of preparing nanometer materials by laser liquid phase ablation method, and specifically relates to a method for performing laser liquid phase ablation test by using a laser liquid phase ablation system. Background technique [0002] Materials, energy and information are recognized as the three pillars of modern civilization, supporting the development of modern civilization. The discovery and preparation of new materials continue to promote the development of science, the advancement of technology and the improvement of people's living standards. The introduction of the concept of nanomaterials and the development of nanotechnology have made materials more and more extensive and far-reaching in the development of human civilization and people's daily life. Various novel phenomena emerging in the research of nanomaterials enrich the treasure house of human knowledge. The widespread use of nanomaterials has made vari...

AI Technical Summary

Problems solved by technology

But so far there are the following defects: 1) The equipment for preparing nanostructures by laser liquid phase ablation is different all over the world, which leads to large fluctuations in laser parameters, and the preparation parameter characterization between different laboratories is not uniform 2) Existing technology generally can only use one laser mode for testing, and cannot select different laser modes; 3) The liquid absorbs laser energy during the preparation process, resulting in unstable energy received by the target. None of the existing technologies can adjust the distance between the liquid surface and the target surface; 4) The existing preparation equipment can only test one target material, and cannot continuously ablate multiple targets; 5) The samples after preparation need to be prepared manually TEM sample, which is not only time-consuming but also causes the sample to be polluted or oxidized in the air; 6) It is difficult to carry out in-situ experiments after the prepared TEM samples are observed by the TEM, and it is difficult to conduct experiments again

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