TY - JOUR
T1 - Liquid-body resonance while contacting a rotating superhydrophobic surface
AU - Chong, Matthew Lai Ho
AU - Cheng, Michael
AU - Katariya, Mayur
AU - Muradoglu, Murat
AU - Cheong, Brandon Huey Ping
AU - Zahidi, Alifa Afiah Ahmad
AU - Yu, Yang
AU - Liew, Oi Wah
AU - Ng, Tuck Wah
PY - 2015/11/1
Y1 - 2015/11/1
N2 - 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.
AB - 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.
KW - Soft Matter: Interfacial Phenomena and Nanostructured Surfaces
UR - http://www.scopus.com/inward/record.url?scp=84986275861&partnerID=8YFLogxK
U2 - 10.1140/epje/i2015-15119-y
DO - 10.1140/epje/i2015-15119-y
M3 - Article
C2 - 26577818
AN - SCOPUS:84947447465
VL - 38
JO - European Physical Journal E
JF - European Physical Journal E
SN - 1292-8941
IS - 11
M1 - 119
ER -