Glass is one of the traditional building materials with low cost and good light transmission. Graphene is a single-layer sheet-like carbon material composed of carbon atoms. It is the thinnest, hardest and conductive at room temperature. The best nanomaterials with great flexibility. The new composite graphene glass produced by combining graphene and glass will greatly expand the glass application space and trigger a revolutionary transformation of the glass industry from high-volume low-value-added applications to economical high-value-added applications.
A group of Peking University uses chemical vapor deposition to optimize the growth conditions to successfully achieve the direct growth of graphene on the glass surface, which is expected to accelerate the fusion of graphene materials and the glass industry, and promote the large-scale application of graphene glass. The famous academic journal "Natural Materials" recently reported on this latest research.
Graphene glass has the advantages of glass translucency, graphene conductivity, thermal conductivity and surface hydrophobicity, and can be applied to thermochromic windows, anti-fog windows and photocatalysis in the future. Academician Liu Zhongfan said that it is believed that graphene glass will have a very broad application prospect in the future, which is crucial for the glass industry and graphene materials.
Current graphene glasses are usually obtained by liquid phase coating or transfer. The graphene film obtained by these methods inevitably has the problem of surface interface contamination, thereby seriously affecting the performance of graphene glass. At the same time, the traditional preparation method is difficult to meet the needs of large-scale applications due to complicated operations, high cost, and low yield. The development of a new method for directly growing graphene on a glass substrate is an important topic in related research.
According to reports, after long-term research, the research team led by Academician Liu Zhongfan of Peking University's College of Chemistry and Molecular Engineering successfully overcomes the low catalytic capacity of glass surface and the carbon fragments on the substrate through precise regulation of reaction gas concentration, growth temperature and growth time. The problem of weak surface migration ability, such as the high-quality glass and ordinary glass successfully achieved the controllable growth of high-quality graphene film.
Tests have shown that under graphene growth conditions, ordinary glass exists in a molten state, and the surface height is uniform and isotropic. The group used these properties of molten glass to achieve the growth of graphene wafers of uniform size and distribution. The graphene glass obtained by the direct growth method has excellent characteristics such as good interface between glass and graphene, and no pollution at the interface.
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