Citrus-peel-like durable slippery surfaces

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

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Author(s)

  • Xing Han
  • Xin Tang
  • Rifei Chen
  • Wei Li
  • Liqiu Wang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number129599
Journal / PublicationChemical Engineering Journal
Volume420
Issue numberPart 1
Online published6 Apr 2021
Publication statusPublished - 15 Sep 2021

Abstract

We present a citrus-peel-like micro-cavity structure for the design of durable Slippery Liquid-Infused Porous Surfaces (SLIPSs). Owing to the re-entrant and enclosed nature of micro-cavity, lubricant oils can be stabilized by mitigating mass loss resulting from liquid displacement and shear drainage, respectively. Citrus-peel-like micro-cavity SLIPS displays two orders of magnitude enhancement in durability in the droplet-sliding test when compared with micro-pillar SLIPS and smooth lubricant surface. We demonstrated precise droplet manipulation without liquid loss and cross-contamination by harnessing the Marangoni effect with photo-thermal control. Cavity-smooth SLIPS with large adhesion contrast was patterned to initiate multiple droplet coalescences for on-demand neutralization reaction. The citrus-peel-like micro-cavity SLIPS would be beneficial to various applications, such as multi-step chemical reactions and bio-detections that require loss-free, contamination-free, and programmable droplet manipulation.

Research Area(s)

  • Citrus-peel-like structure, Droplet manipulation, Durable slippery surface, Microfluidics

Citation Format(s)

Citrus-peel-like durable slippery surfaces. / Han, Xing; Tang, Xin; Chen, Rifei; Li, Wei; Zhu, Pingan; Wang, Liqiu.

In: Chemical Engineering Journal, Vol. 420, No. Part 1, 129599, 15.09.2021.

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