title: Effects of substrate on piezoelectricity of electrospun poly(vinylidene fluoride)-nanofiber-based energy generators.
abstract: We report the effects of various substrates and substrate thicknesses on electrospun poly(vinylidene fluoride) (PVDF)-nanofiber-based energy harvesters. The electrospun PVDF nanofibers showed an average diameter of 84.6 ± 23.5 nm. A high relative β-phase fraction (85.2%) was achieved by applying high voltage during electrospinning. The prepared PVDF nanofibers thus generated considerable piezoelectric potential in accordance with the sound-driven mechanical vibrations of the substrates. Slide glass, poly(ethylene terephthalate), poly(ethylene naphthalate), and paper substrates were used to investigate the effects of the intrinsic and extrinsic substrate properties on the piezoelectricity of the energy harvesters. The thinnest paper substrate (66 μm) with a moderate Young's modulus showed the highest voltage output (0.4885 V). We used high-performance 76, 66, and 33 μm thick papers to determine the effect of paper thickness on the output voltage. The thinnest paper substrate resulted in the highest voltage output (0.7781 V), and the numerical analyses of the sound-driven mechanical deformation strongly support the hypothesis that substrate thickness has a considerable effect on piezoelectric performance.
authors: Samsung Advanced Institute of Technology , Yong-in 449-712, Republic of Korea.
authors: Byoung-Sun
authors: BS
authors: Lee
authors: Boongik
authors: B
authors: Park
authors: Ho-Sung
authors: HS
authors: Yang
authors: Jin Woo
authors: JW
authors: Han
authors: Chweelin
authors: C
authors: Choong
authors: Jihyun
authors: J
authors: Bae
authors: Kihwan
authors: K
authors: Lee
authors: Woong-Ryeol
authors: WR
authors: Yu
authors: Unyong
authors: U
authors: Jeong
authors: U-In
authors: UI
authors: Chung
authors: Jong-Jin
authors: JJ
authors: Park
authors: Ohyun
authors: O
authors: Kim