Twisted Bi-layer graphene: Microscopic rainbows

Campos-Delgado, J.;Algara-Siller, G.;Santos, C.N.;Kaiser, U.;Raskin, J.-P.
(2013) Small — Vol. 9, n° 19, p. 3247-3251 (2013)

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  • Campos-Delgado, J.
    Author
  • Algara-Siller, G.
    Author
  • Santos, C.N.
    Author
  • Kaiser, U.
    Author
  • Raskin, J.-P.
    Author
Abstract
Blue, pink, and yellow colorations appear from twisted bi-layer graphene (tBLG) when transferred to a SiO<inf>2</inf>/Si substrate (SiO<inf>2</inf> = 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 SiO<inf>2</inf>/Si. Copyright © 2013 WILEY-VCH Verlag GmbH &amp; Co. KGaA, Weinheim.

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Campos-Delgado, J., Algara-Siller, G., Santos, C. N., Kaiser, U., & Raskin, J.-P. (2013). Twisted Bi-layer graphene: Microscopic rainbows. Small, 9(19), 3247-3251. https://doi.org/10.1002/smll.201300050 (Original work published 2013)