Static and dynamic behaviour of aqueous drops on thin lubricating fluid-coated slippery (LCS) surfaces

M. Sharma, B. Bhatt, S. Gupta, R. Pant, K. Khare

Research output: Contribution to journalArticlepeer-review

Abstract

Inspired by Nepenthes pitcher plants, lubricating fluid infused slippery (LIS) surfaces have recently gained tremendous attention from various research groups. We, alternatively, present lubricating fluid-coated slippery (LCS) surfaces based on smooth solid surfaces. The biggest advantage of LCS surfaces over LIS surfaces is that solid surfaces need not be rough or porous. We discuss that the surface energy of the underlying solid surfaces plays the most important role in preparing the LCS surfaces. Lubricating fluid-coated hydrophilic surfaces result in sinking aqueous drops due to the instability of the thin lubricating film. Additionally, stable and floating aqueous drops are observed on similar hydrophobic surfaces. We also observed that the presence of surface roughness enhances the stability and performance of LCS surfaces. Later we discuss various characteristics of LCS surfaces and its effects on the static and dynamic behaviour of aqueous drops on LCS surfaces.

Original languageEnglish
Article number191
JournalBulletin of Materials Science
Volume43
Issue number1
DOIs
StatePublished - 1 Dec 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020, Indian Academy of Sciences.

Funding

This research study was supported by Hindustan Unilever Limited, India and DST, New Delhi through its Unit of Excellence on Soft Nanofabrication at IIT Kanpur.

FundersFunder number
Hindustan Unilever Limited
IIT Kanpur
Indian Institute of Technology Kanpur
Department of Science and Technology, Ministry of Science and Technology, India

    Keywords

    • Wetting
    • liquid–liquid interface
    • lubricant
    • sinking
    • slipping

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