扭曲双层石墨烯：微观彩虹。
Twisted bi-layer graphene: microscopic rainbows.
机构信息
ICTEAM, Université catholique de Louvain, Louvain-la-Neuve, 1348, Belgium.
出版信息
Small. 2013 Oct 11;9(19):3247-51. doi: 10.1002/smll.201300050. Epub 2013 Apr 22.
Blue, pink, and yellow colorations appear from twisted bi-layer graphene (tBLG) when transferred to a SiO2 /Si substrate (SiO2 = 100 nm-thick). Raman and electron microscope studies reveal that these colorations appear for twist angles in the 9-15° range. Optical contrast simulations confirm that the observed colorations are related to the angle-dependent electronic properties of tBLG combined with the reflection that results from the layered structure tBLG/100 nm-thick SiO2 /Si.
当转移到 SiO2 /Si 衬底上时，扭曲双层石墨烯（tBLG）会呈现蓝色、粉色和黄色。拉曼和电子显微镜研究表明，这些颜色出现在 9-15°范围内的扭曲角度。光学对比模拟证实，观察到的颜色与 tBLG 的角度相关的电子特性以及 tBLG/100nm 厚 SiO2 /Si 层状结构的反射有关。
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