Piezoelectricity of sub-20-nm nanoimprinted PVDF-TrFE nanograss

This paper composed a superior sub-20 nm ferroelectric PVDF-TrFE copolymer nanograss, and provided enhanced piezoelectricity on polymer surfaces. This study demonstrated sub-20 nm PVDF-TrFE nanograss structures that are nanoimprinted using a silicon nanograss mold in a single step. According to the PFM measurements, the maximum piezoelectricity of the single PVDF-TrFE nanopillar was 210.4 pm/V. The piezoelectricity of the developed PVDF-TrFE nanograss structures was 5.19 times larger than that of the PVDF-TrFE flat thin films. The developed technique is simple, economical, and easy to fabricate.