title: Piezoelectric two-dimensional nanosheets/anionic layer heterojunction for efficient direct current power generation.
abstract: Direct current (DC) piezoelectric power generator is promising for the miniaturization of a power package and self-powering of nanorobots and body-implanted devices. Hence, we report the first use of two-dimensional (2D) zinc oxide (ZnO) nanostructure and an anionic nanoclay layer to generate piezoelectric DC output power. The device, made from 2D nanosheets and an anionic nanoclay layer heterojunction, has potential to be the smallest size power package, and could be used to charge wireless nano/micro scale systems without the use of rectifier circuits to convert alternating current into DC to store the generated power. The combined effect of buckling behaviour of the ZnO nanosheets, a self-formed anionic nanoclay layer, and coupled semiconducting and piezoelectric properties of ZnO nanosheets contributes to efficient DC power generation. The networked ZnO nanosheets proved to be structurally stable under huge external mechanical loads.
authors.affiliation: School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 440-746, Republic of Korea.
authors.forename: Kwon-Ho
authors.initials: KH
authors.lastname: Kim
authors.forename: Brijesh
authors.initials: B
authors.lastname: Kumar
authors.forename: Keun Young
authors.initials: KY
authors.lastname: Lee
authors.forename: Hyun-Kyu
authors.initials: HK
authors.lastname: Park
authors.forename: Ju-Hyuck
authors.initials: JH
authors.lastname: Lee
authors.forename: Hyun Hwi
authors.initials: HH
authors.lastname: Lee
authors.forename: Hoin
authors.initials: H
authors.lastname: Jun
authors.forename: Dongyun
authors.initials: D
authors.lastname: Lee
authors.forename: Sang-Woo
authors.initials: SW
authors.lastname: Kim