Self-propelled droplet-based electricity generation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

2 Scopus Citations
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Author(s)

  • Chaoran Liu
  • Jie Wei
  • Linxi Dong
  • Dongfang Yan
  • Xiaofeng Zhou

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)23164-23169
Journal / PublicationNanoscale
Volume10
Issue number48
Early online date15 Nov 2018
Publication statusPublished - 28 Dec 2018

Abstract

Droplets are ubiquitous in nature and the preferential control of droplet transport offers limitless potential for efficient mass and momentum transfer as well as energy conversion. In this work, we show that even without the need for any external energy input, the self-propelled motion of droplets driven by a surface wetting gradient can lead to reliable electricity generation. Simple analytical analysis demonstrates that the output voltage results from the modulation of the surface charge distribution on the dynamically changing solid/liquid interfaces, which can be programmed by tailoring the wetting gradient and the size of the droplet. We demonstrate that a self-propelled 25 μL droplet can generate a peak current of 93.5 nA and a maximum output power of 2.4 nW. This work provides a new angle for optimizing energy harvesting devices based on liquid-solid interfaces.

Citation Format(s)

Self-propelled droplet-based electricity generation. / Liu, Chaoran; Sun, Jing; Zhuang, Yu; Wei, Jie; Li, Jing; Dong, Linxi; Yan, Dongfang; Hu, Alice; Zhou, Xiaofeng; Wang, Zuankai.

In: Nanoscale, Vol. 10, No. 48, 28.12.2018, p. 23164-23169.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review