For some brief note, the Muller glass is world's thinnest glass, almost resembling liquid yet it is glass made of 2 atoms of thickness. Was discovered by accident at Cornell University and will be declared as the Guinness Record for glass thinness in 2014.
Huang, P. Y., Kurasch, S., Srivastava, A., Skakalova, V., Kotakoski, J., ... Muller, D. A. (2013). Ute Kaiser: Direct imaging of a two-dimensional silica glass on graphene. Nano Letters, 12 (2): 1081 DOI: 10.1021/nl204423x; Retrieved from: Guinness record: World’s thinnest glass is just two atoms thick .