Improving information density in ferroelectric polymer films by using nanoimprinted gratings

摘要

In this work, well-defined low aspect ratio nanostructures based on nanogratings on thin films of poly(vinylidene fluoride–trifluoroethylene) copolymers were prepared. By using these nanogratings, an improved management of writing and reading information of about 500 Gbit/in.2 (0.01?bitm2) can be reached as revealed by Piezoresponse Force Microscopy. Structural investigation by means of X-ray diffraction techniques indicates that the physical confinement generated by nanoimprint promotes the development of smaller and edge-on oriented crystals. Our results evidence that one-dimensional nanostructuring can be a straightforward approach to improve the control of the polarization in ferroelectric polymer thin films.