Molecular reorientation of polyimide film induced by thermal nanoimprint lithography and liquid crystals alignment on it

Enhancement of light-emitting properties by simultaneously patterning and controlling molecular alignment in polyfluorene thin films

“…[1][2][3] Therefore, many approaches, such as rubbing, 4 stretching, 5 and friction-transfer, [6][7][8] have been developed to induce chain alignment in thin lms. An additional polymer layer, such as a rubbed polyimide lm 9 or a photo-induced azobenzene lm, has also been introduced into these approaches. 10,11 Most of these assisting thin layers are good insulators, whose thicknesses do not exceed tens of nanometers in the traditional PLED 5-layer structure.…”