Figure 1. (a) Schematic diagram of a typical multilayer OLED. (b) Photograph of a SWNT film on an alumina filtration membrane. Inset:
an SEM image showing the microscopic structure of the porous membrane surface (before SWNT deposition). (c) Illustration of the dry
transfer process, in which the SWNT film is peeled off from the filtration membrane using a PDMS stamp and successively printed on a
rigid or flexible substrate. (d) A transparent 40-nm-thick SWNT film on a glass substrate 2¢¢ in diameter and (e) a flexed SWNT film on
a PE sheet. A sheet of paper with printed “USC” was placed underneath the nanotube films to illustrate the transparency.