Preparation method of millimeter-scale monolayer monocrystalline graphene based on polycrystalline copper foil
A single crystal graphene, millimeter-scale technology, applied in the field of thin film graphene material preparation, can solve the problems of dirty copper foil surface, difficulty in controlling the cleaning degree and cleaning time of copper foil, and affecting the preparation of graphene, etc., to achieve uniform and The effect of uniform growth
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[0034] Embodiment: a kind of preparation method of millimeter-scale single-layer single-crystal graphene based on polycrystalline copper foil, such as figure 1 - As shown in Figure 4, the specific steps are:
[0035] (1) Pretreatment of copper foil:
[0036] Use Alfa Aesar's #46986 copper foil with a thickness of 0.025mm and a purity of 99.8%. At room temperature, clean the surface of the copper foil with absolute ethanol and dry it with dry nitrogen; cut the copper foil with scissors Form a rectangular diaphragm of 6.0cm*5.5cm, fold it into a closed rectangular box; then load the rectangular box into a high-temperature-resistant quartz tube with an inner diameter of 50mm, and place the quartz tube in the CVD reaction chamber. evacuate the body to an approximate vacuum state below 0.05Pa, and then continuously feed 600sccm argon, 100sccm hydrogen and 0.06sccm oxygen into the CVD reaction chamber until the pressure in the CVD reaction chamber reaches 460Pa, and continue to mai...
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