Embossed hollow hemisphere-based piezoelectric nanogenerator and highly responsive pressure sensor

Jinsung Chun, Keun Young Lee, Chong-Yun Kang, Myung Wha Kim, Sang Woo Kim, Jeong Min Baik

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Harvesting energy using piezoelectric materials such as ZnO, at nanoscale due to geometrical effects, are highly desirable for powering portable electronics, biomedical, and healthcare applications. Although one-dimensional nanostructures such as nanowires have been the most widely studied for these applications, there exist a limited number of piezomaterials that can be easily manufactured into nanowires, thus, developing effective and reliable means of preparing nanostructures from a wide variety of piezomaterials is essential for the advancement of self-powered devices. In this study, ZnO embossed hollow hemispheres thin film for highly responsive pressure sensors and nanogenerators are reported. The asymmetric hemispheres, formed by an oblique angle deposition, cause an unsymmetrical piezoelectric field direction by external force, resulting in the control of the current direction and level at about 7 mA cm-2 at normal force of 30 N. The nanogenerators repeatedly generate the voltage output of ≈0.2 V, irrespective of the degree of symmetry. It is also demonstrated that when one piece of hemisphere layer is stacked over another to form a layer-by-layer matched architecture, the output voltage in nanogenerators increases up to 2 times.

Original languageEnglish
Pages (from-to)2038-2043
Number of pages6
JournalAdvanced Functional Materials
Volume24
Issue number14
DOIs
Publication statusPublished - 2014 Apr 9

Fingerprint

Pressure sensors
pressure sensors
hemispheres
Nanowires
hollow
Nanostructures
Piezoelectric materials
Energy harvesting
Electric potential
nanowires
Electronic equipment
output
electric potential
Thin films
causes
symmetry
thin films
electronics
Direction compound
energy

Keywords

  • embossed thin films
  • hollow hemispheres
  • nanogenerator
  • piezoelectrics
  • pressure sensor

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Embossed hollow hemisphere-based piezoelectric nanogenerator and highly responsive pressure sensor. / Chun, Jinsung; Lee, Keun Young; Kang, Chong-Yun; Kim, Myung Wha; Kim, Sang Woo; Baik, Jeong Min.

In: Advanced Functional Materials, Vol. 24, No. 14, 09.04.2014, p. 2038-2043.

Research output: Contribution to journalArticle

Chun, Jinsung ; Lee, Keun Young ; Kang, Chong-Yun ; Kim, Myung Wha ; Kim, Sang Woo ; Baik, Jeong Min. / Embossed hollow hemisphere-based piezoelectric nanogenerator and highly responsive pressure sensor. In: Advanced Functional Materials. 2014 ; Vol. 24, No. 14. pp. 2038-2043.
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