Fabrication of polyimide nanowires array and research on the wetting mechanism

Polyimide nanowire array was fabricated by wetting alumina templates using polyamic acid solution. SEM was employed to characterize the morphology of nanowires. The flow distance of polymer solution in nanochannels was investigated by measuring the length of generated polymer nanowires, which demonstrates that the flow behaviour of polymer solution on nanoscale is in accordance with Lucas-Washburn equation. The influence of polymer solution concentration on the wetting mechanism and formed structures was discussed to help better control the nanostructure in the template.