Please use this identifier to cite or link to this item: http://idr.nitk.ac.in/jspui/handle/123456789/13644
Title: Tunable adhesion and slip on a bio-mimetic sticky soft surface
Authors: Bandyopadhyay, S.
Sriram, S.M.
Parihar, V.
Das, Gupta, S.
Mukherjee, R.
Chakraborty, S.
Issue Date: 2019
Citation: Soft Matter, 2019, Vol.15, 44, pp.9031-9040
Abstract: Simultaneous tuning of wettability and adhesion of a surface requires intricate procedures for altering the interfacial structures. Here, we present a simple method for preparing a stable slippery surface, with an intrinsic capability of varying its adhesion characteristics. Cross-linked PDMS, an inherent hydrophobic material commonly used for microfluidic applications, is used to replicate the structures on the surface of a rose petal which acts as a high adhesion solid base and is subsequently oleoplaned with silicone oil. Our results demonstrate that the complex hierarchical rose petal structures can arrest dewetting of the silicone oil on the cross linked PDMS base by anchoring the oil film strongly even under flow. Further, by tuning the extent of submergence of the rose petal structures with silicone oil, we could alter the adhesion characteristics of the surface on demand, while retaining its slippery characteristics for a wide range of the pertinent parameters. We have also demonstrated the possible fabrication of gradient adhesion surfaces. This, in turn, may find a wide variety of applications in water harvesting, droplet maneuverability and no-loss transportation in resource-limited settings. � 2019 The Royal Society of Chemistry.
URI: 10.1039/c9sm01680e
http://idr.nitk.ac.in/jspui/handle/123456789/13644
Appears in Collections:1. Journal Articles

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