Graphene is currently the thinnest but hardest nanomaterial in the world, almost completely transparent, absorbing only 2.3% of light; The thermal conductivity is as high as 5,300 W/(m·K), which is higher than that of carbon nanotubes and diamonds, and its electron mobility exceeds 15,000 cm2/(V·s) at room temperature, and is higher than nanocarbon tubes or monocrystalline silicon, and the resistivity is only about 10-6 Ω·cm, which is lower than copper or silver, making it the least resistivity material in the world. Because of its extremely low resistivity and extremely fast movement of electrons, it is expected to be used to develop a new generation of electronic components or transistors that are thinner and conductive faster. Graphene is essentially a transparent, good conductor, and is also suitable for making transparent touch screens, light panels, and even solar cells. Another property of graphene is that the quantum Hall effect can be observed at room temperature.