The authors of the article "Substrate-induced bandgap opening in epitaxial graphene" in Nature Materials 6, 770–775 (2007) wish to correct the references. They intend to add references 20 and 21 to join reference 9 in the first paragraph regarding single layer and bilayer graphene. Additionally, they want to add three new references to join references 7 and 8 in the first paragraph regarding gaps in graphene ribbons. The added references are: Nakada, K., Fujita, M., Dresselhaus, G. & Dresselhaus, M. S. Edge state in graphene ribbons: nanometer size effect and edge shape dependence. Phys. Rev. B 54, 17954–17961 (1996); Son, Y. W., Cohen, M. L. & Louie, S. G. Energy gaps in graphene nanoribbons. Phys. Rev. Lett. 97, 216803 (2006); and Han, M.Y., Ozyilmaz, B., Zhang, Y. & Kim, P. Energy band-gap engineering of graphene nanoribbons. Phys. Rev. Lett. 98, 206805 (2007). Furthermore, they wish to add a reference regarding theoretical work on substrate-induced band gap in graphene on hexagonal boron nitride: Giovannetti, G., Khomyakov, P. A., Brocks, G., Kelly, P. J. & van den Brink, J. Substrate-induced band gap in graphene on hexagonal boron nitride: Ab initio density functional calculations. Phys. Rev. B 76, 073103 (2007). These corrections are made to improve the accuracy and completeness of the references in the article.The authors of the article "Substrate-induced bandgap opening in epitaxial graphene" in Nature Materials 6, 770–775 (2007) wish to correct the references. They intend to add references 20 and 21 to join reference 9 in the first paragraph regarding single layer and bilayer graphene. Additionally, they want to add three new references to join references 7 and 8 in the first paragraph regarding gaps in graphene ribbons. The added references are: Nakada, K., Fujita, M., Dresselhaus, G. & Dresselhaus, M. S. Edge state in graphene ribbons: nanometer size effect and edge shape dependence. Phys. Rev. B 54, 17954–17961 (1996); Son, Y. W., Cohen, M. L. & Louie, S. G. Energy gaps in graphene nanoribbons. Phys. Rev. Lett. 97, 216803 (2006); and Han, M.Y., Ozyilmaz, B., Zhang, Y. & Kim, P. Energy band-gap engineering of graphene nanoribbons. Phys. Rev. Lett. 98, 206805 (2007). Furthermore, they wish to add a reference regarding theoretical work on substrate-induced band gap in graphene on hexagonal boron nitride: Giovannetti, G., Khomyakov, P. A., Brocks, G., Kelly, P. J. & van den Brink, J. Substrate-induced band gap in graphene on hexagonal boron nitride: Ab initio density functional calculations. Phys. Rev. B 76, 073103 (2007). These corrections are made to improve the accuracy and completeness of the references in the article.