Another breakthrough in meter-level single-crystal graphene technology, the world's largest epitaxial single crystal was prepared in 20 minutes

Graphene is a typical two-dimensional light element quantum material system with superior quantum properties. The scientific community has observed many quantum phenomena and quantum effects in the graphene system. Graphene has become an important quantum system in the field of condensed matter physics research and has broad application prospects in the fields of quantum information, quantum computing, and quantum communications in the future.

How to obtain large-size single-crystal graphene is a hot and difficult point in the field of graphene research, and is the basis for realizing the industrial application of graphene. Although the preparation of meter-scale polycrystalline graphene films has been achieved using chemical vapor deposition (CVD) methods, the technology of meter-scale single-crystalline graphene films has not yet been broken.

Recently, with the support of the Key Special Project on Quantum Control and Quantum Information, Researcher Liu Kaihui, Academician Yu Dapeng, Academician Wang Enge, and their collaborators from Peking University, after achieving the first ultra-fast growth of graphene single crystals in 2016, have been working on a meter-level single-crystal Important progress has been made in the growth of graphene again. The research team converted industrial polycrystalline copper foil into single crystal copper foil and obtained the largest single crystal Cu(111) foil in the world. Using epitaxial growth technology and ultra-fast growth technology, it successfully prepared the worlds largest foil in 20 minutes. Size (5&TImes;50 cm2) epitaxial single-crystal graphene material.

The research results provide the necessary scientific basis for the rapid growth of meter-level single-crystal graphene and lay the foundation for the industrial application of graphene single crystal quantum technology. The research results were published in Science BulleTIn in August 2017 and were selected as the cover article. Academician Cheng Huiming of the Shenyang Institute of Metal Research, Chinese Academy of Sciences published a key recommendation review article in Science BulleTIn at the same time.