title: Non-wrinkled, highly stretchable piezoelectric devices by electrohydrodynamic direct-writing.
abstract: Piezoelectric structures, in forms that allow mere in-surface deformations under large strains, are attractive for bio-integrated systems. Here, mechano-electrospinning (MES) is presented to direct-write straight nanofibers of polyvinylidene fluoride onto a prestrained poly(dimethylsiloxane) (PDMS) substrate, to position and polarize a piezoelectric nanofiber array in one-step. Wrinkled/non-wrinkled buckling modes are found when the substrates are released, and the morphology of the direct-written fiber proved the key to determine the buckling modes, which can be tuned precisely by MES parameters. The non-wrinkled, stretchable piezoelectric devices with a highly synchronized serpentine fiber array exhibit their in-surface deformation and stable piezoelectric performance up the failure strain of PDMS (∼110% in our study), which may be used as stretchable sensors and energy converters/providers.
authors: State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China. yahuang@hust.edu.cn yinzhp@mail.hust.edu.cn.
authors: YongQing
authors: Y
authors: Duan
authors: YongAn
authors: Y
authors: Huang
authors: ZhouPing
authors: Z
authors: Yin
authors: NingBin
authors: N
authors: Bu
authors: WenTao
authors: W
authors: Dong