TY - JOUR
T1 - Citrus-peel-like durable slippery surfaces
AU - Han, Xing
AU - Tang, Xin
AU - Chen, Rifei
AU - Li, Wei
AU - Zhu, Pingan
AU - Wang, Liqiu
N1 - Funding Information:
The financial support from the Research Grants Council of Hong Kong (GRF 17204420, 17210319, 17204718 and 17237316, and CRF C1006-20WF and C1018-17G) is gratefully acknowledged. The work is also supported in part by the Zhejiang Provincial, Hangzhou Municipal, Lin'an County Governments and Zhejiang Institute of Research and Innovation, the University of Hong Kong.
Funding Information:
The financial support from the Research Grants Council of Hong Kong ( GRF 17204420 , 17210319 , 17204718 and 17237316 , and CRF C1006-20WF and C1018-17G ) is gratefully acknowledged. The work is also supported in part by the Zhejiang Provincial, Hangzhou Municipal, Lin’an County Governments and Zhejiang Institute of Research and Innovation, the University of Hong Kong.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/9/15
Y1 - 2021/9/15
N2 - 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.
AB - 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.
KW - Citrus-peel-like structure
KW - Droplet manipulation
KW - Durable slippery surface
KW - Microfluidics
UR - http://www.scopus.com/inward/record.url?scp=85104049160&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2021.129599
DO - 10.1016/j.cej.2021.129599
M3 - Journal article
AN - SCOPUS:85104049160
SN - 1385-8947
VL - 420
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 129599
ER -