Piezoelectric two-dimensional nanosheets/anionic layer heterojunction for efficient direct current power generation

Kwon Ho Kim, Brijesh Kumar, Keun Young Lee, Hyun Kyu Park, Ju Hyuck Lee, Hyun Hwi Lee, Hoin Jun, Dongyun Lee, Sang Woo Kim

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number2017
JournalScientific reports
Publication statusPublished - 2013

Bibliographical note

Funding Information:
This work was financially supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Education, Science and Technology (MEST) (2012R1A2A1A01002787, 2010-0019086, 2010-0015035, and 2011-0027090) and the Energy International Collaboration Research & Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Knowledge Economy (MKE) (2011-8520010050).

All Science Journal Classification (ASJC) codes

  • General


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