A method and device for rapid and macro-scale preparation of ultra-large two-dimensional material thin films

Abstract

The invention provides a method and device for rapid macro production of an oversize two-dimensional material thin film, and relates to a preparing method of the oversize two-dimensional material thinfilm. The method comprises the following steps that metal foil or other flexible high-temperature-resistant substrates and a flexible high-temperature-resistant interlayer are rewound into a large roll, the roll is placed on a support, and the roll simultaneously grows overall in a material growth cavity, so that the high-quality oversize two-dimensional material thin film is rapidly produced onthe surface of the metal foil or the surfaces of the other flexible high-temperature-resistant substrates in a macro mode, and is large in size, easy to cut, easy to process and low in cost. Accordingto the method and device, the technical problems that a two-dimensional material thin film produced by a traditional method is complex in process, expensive in equipment, limited in size and poor inquality, so that the performance is greatly reduced, a roll-to-roll preparation method is low in growth efficiency, required equipment is complex and high in cost, and the requirements of large-scaleapplications cannot be met are solved, and high-quality oversize two-dimensional material thin film samples can be rapidly produced in a macro mode through the very simple method.

Description

technical field [0001] The invention relates to a method and a device for rapidly and macro-preparing ultra-large two-dimensional material thin films. Background technique [0002] In 2004, Geim et al. used mechanical exfoliation to obtain graphene and revealed its unique physical properties. Since then, the research on graphene has been a hot spot in the field of condensed matter physics and materials for more than ten years. Along with the rise of graphene research, research on other two-dimensional materials has also set off a research boom. The two-dimensional material samples that can be obtained by mechanical exfoliation have few defects and high quality, which can satisfy the research on the basic physical properties of materials. However, the sample size obtained by this method is small, the yield is extremely low, the efficiency is low, and the repeatability is poor, which is not suitable for the industrial application of two-dimensional materials. Among the exist...

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Problems solved by technology

However, the two-dimensional material thin films prepared by the current CVD / PVD method are limited by the size of the growth chamber, and most of them are on the order of centimeters or even decimeters, which greatly reduces the application range of materials; while roll-to-roll CVD / PVD Although the size of the two-dimensional material film prepared by the method can reach the order of hundreds of meters or even kilometers, it is limited by the growth rate of the two-dimensional material, and its growth time is often as long as several days or even months, and the growth efficiency is low. And the required equipment is complex and costly, which cannot meet the needs of large-scale applications

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