Mechanical and electrical characterization of PVDF-ZnO hybrid structure for application to nanogenerator. (March 2017)

• Record Type: Journal Article
• Authors: Choi, Moonkang; Murillo, Gonzalo; Hwang, Sungmin; Kim, Jae Woong; Jung, Jong Hoon; Chen, Chih-Yen; Lee, Minbaek
• Is Part Of: Nano energy. Volume 33(2017:Mar.)
• Page Start: 462
• Page End: 468
• Publication Date: 2017-03
• Subjects: NW Nanowire -- PVDF Poly(vinylidende fluoride) -- NG Nanogenerator -- AFM Atomic Force Microscope -- EFM Electrostatic Force Microscopy -- SKPM Scanning Kelvin Probe Microscopy -- SEM Scanning Electron Microscope -- FEM Finite Element Method -- F-D curve Force-distance curve; Piezoelectric -- Nanogenerator -- Zinc oxide -- Nanowire -- Ferroelectric -- PVDF; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2017.01.062
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: The hybridization of different nanomaterials has been studied widely for the versatile use of nanogenerators in a range of environments. This paper reports an analysis of the power enhancements in a hybrid piezoelectric structure comprised of zinc oxide (ZnO) nanowires and poly(vinylidene fluoride) (PVDF) polymer. The mechanical properties were examined by atomic force microscopy and simulated by the finite element method. The electrical properties of the hybrid nanogenerators were observed by electrostatic force microscopy and direct I-V measurements. Based on this analysis, the ZnO nanowires delivered internal strain to the PVDF in the hybrid structure, which enhanced the electrical power output of a hybrid nanogenerator. These results may open up new ways to optimize a hybrid piezoelectric structure in terms of its design and the spatial arrangement of each nanostructure. Graphical abstract: Highlights: The origin of the power enhancement in a composite nanogenerator comprised of ZnO nanowires and PVDF is investigated. Electrostatic force microscopy measurements confirm major contribution of power outputs in a hybrid structure. Quantitative analysis of mechanical properties of a hybrid structure exhibits a transferring local strains. Finite element method simulation supports the experimental results regarding the origin of power enhancement in a hybrid nanogenerator.