Thermal drive deforming transmission electric mirror grid and one-dimensional nano material deforming method

Abstract

The invention relates to a thermally driven deforming transmission electron microscope grid and a one-dimensional nano material deformation method, belonging to the nano device and the transmission electron microscope original position nano material deformation method field. The prior grid can be deformed only through electron beam irradiation and the stress supplied is limited. The grid of the invention is as follows: a metallic film A and a metallic film B are vapor-plated on a supporting film of the prior grid, and the thermal expansion coefficient of the metallic film A is more than that of the metallic film B. The one-dimensional nano material deformation method by adoption of the grid is as follows: after the metallic film A and the metallic film B are cut open, one-dimensional nano materials are dispersed on the metallic film A and the metallic film B which are then placed into a transmission electron microscope for heating; the two cracked films are curled due to difference of the expansion coefficients, thereby the driving force for deformation of the one-dimensional nano materials is provided and deformation of the one-dimensional nano materials is realized. The grid can realize large-angle roll steer in two directions of X and Y and realize the original position deformation operation of the one-dimensional nano materials; moreover, the grid is characterized in reliable performance, convenient assembly and simple structure and expands the function of the transmission electron microscope.

Description

technical field [0001] The invention belongs to the field of in-situ nano material deformation methods in nano devices and transmission electron microscopes, and in particular relates to a heat-driven deformation transmission electron microscope grid and a one-dimensional nano material deformation method. Background technique [0002] Due to the extremely high resolution of the transmission electron microscope, it can provide information at the nanoscale or even the atomic scale. It is a powerful tool for studying the microstructure of substances. It has a wide range of applications in physics, chemistry, material science, life science and other fields, especially in the current The rapidly developing field of nanoscience and technology is one of the most powerful research tools. The transmission electron microscope grid is used to support the sample to be tested. The skeleton of the most commonly used transmission electron microscope grid is generally a copper grid, and the...

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Problems solved by technology

However, the controllability of the curling of the carbon film induced by electron beam irradiation is poor, the application of stress and the strain rate are difficult to control, and the stress provided is limited, and it is difficult to deform some materials with high strength.

[0006] In the above-mentioned in-situ nanomaterial mechanical property test by transmission electron microscope, neither the first two sample consoles nor the carrier grid can achieve large-angle double-tilt. For most nanomaterials that require real-time observation of structural changes under the action of external forces , its application is limited by

While the third method is less controllable and provides limited stress, many materials are not suitable for this method

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