Rapid and Persistent Suction Condensation on Hydrophilic Surfaces for High-Efficiency Water Collection

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

45 Scopus Citations
View graph of relations

Author(s)

  • Minjie Liu
  • Bingang Du
  • Yuanbo Liu
  • Rongfu Wen
  • Zhong Lan
  • Xiaofeng Zhou
  • Xuehu Ma
  • Zuankai Wang

Detail(s)

Original languageEnglish
Pages (from-to)7411–7418
Journal / PublicationNano Letters
Volume21
Issue number17
Online published26 Jun 2021
Publication statusPublished - 8 Sept 2021

Abstract

Water collection by dew condensation emerges as a sustainable solution to water scarcity. However, the transient condensation process that involves droplet nucleation, growth, and transport imposes conflicting requirements on surface properties. It is challenging to satisfy all benefits for different condensation stages simultaneously. By mimicking the structures and functions of moss Rhacocarpus, here, we report the attainment of dropwise condensation for efficient water collection even on a hydrophilic surface gated by a liquid suction mechanism. The Rhacocarpus-inspired porous surface (RIPS), which possesses a three-level wettability gradient, facilitates a rapid, directional, and persistent droplet suction. Such suction condensation enables a low nucleation barrier, frequent surface refreshing, and well-defined maximum droplet shedding radius simultaneously. Thus, a maximum ∼160% enhancement in water collection performance compared to the hydrophobic surface is achieved. Our work provides new insights and a design route for developing engineered materials for a wide range of water-harvesting and phase-change heat-transfer applications.

Research Area(s)

  • bioinspiration, condensation, liquid suction, water collection, wettability gradient

Citation Format(s)

Rapid and Persistent Suction Condensation on Hydrophilic Surfaces for High-Efficiency Water Collection. / Cheng, Yaqi; Wang, Mingmei; Sun, Jing et al.
In: Nano Letters, Vol. 21, No. 17, 08.09.2021, p. 7411–7418.

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