Liquid-body resonance while contacting a rotating superhydrophobic surface

Matthew Lai Ho Chong, Michael Cheng, Mayur Katariya, Murat Muradoglu, Brandon Huey Ping Cheong, Alifa Afiah Ahmad Zahidi, Yang Yu, Oi Wah Liew, Tuck Wah Ng

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

Abstract

We advance a scheme in which a liquid body on a stationary tip in contact with a rotating superhydrophobic surface is able to maintain resonance primarily from stick-slip events. With tip-to-surface spacing in the range 2.73 ≤ h < 2.45 mm for a volume of 10 μL, the liquid body was found to exhibit resonance independent of the speed of the drum. The mechanics were found to be due to a surface-tension-controlled vibration mode based on the natural frequency values determined. With spacing in the range 2.45 ≤ h < 2.15 mm imposed for a volume of 10 μL, the contact length of the liquid body was found to vary with rotation of the SH drum. This was due to the stick-slip events being able to generate higher energy fluctuations causing the liquid-solid contact areas to vary since the almost oblate spheroid shape of the liquid body had intrinsically higher surface energies. This resulted in the natural frequency perturbations being frequency- and amplitude-modulated over a lower frequency carrier. These findings have positive implications for microfluidic sensing.

Original languageEnglish
Article number119
Number of pages9
JournalThe European physical journal. E, Soft matter
Volume38
Issue number11
DOIs
Publication statusPublished - 1 Nov 2015

Keywords

  • Soft Matter: Interfacial Phenomena and Nanostructured Surfaces

Cite this