Merck
  • Home
  • Search Results
  • Liquid-body resonance while contacting a rotating superhydrophobic surface.

Liquid-body resonance while contacting a rotating superhydrophobic surface.

The European physical journal. E, Soft matter (2015-11-19)
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
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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Ethanol, purum, secunda spirit, denaturated with 2% 2-butanone and 0.5% 4-methyl-2-pentanone, S15, ~96% (based on denaturant-free substance)
Sigma-Aldrich
Silver nitrate solution, 2.5 % (w/v) AgNO3 in H2O
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, anhydrous, ≥99.5%
Sigma-Aldrich
Glycerol, FCC, FG
Sigma-Aldrich
Glycerol, BioReagent, suitable for cell culture, suitable for insect cell culture, suitable for electrophoresis, ≥99% (GC)
Sigma-Aldrich
Glycerol, for molecular biology, ≥99.0%
Sigma-Aldrich
Glycerol, BioXtra, ≥99% (GC)
Sigma-Aldrich
Glycerol, ≥99.5%
Sigma-Aldrich
Glycerol, BioUltra, for molecular biology, anhydrous, ≥99.5% (GC)
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, ACS spectrophotometric grade, 95.0%
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, meets USP testing specifications
Sigma-Aldrich
Silver nitrate on silica gel, extent of labeling: ~10 wt. % loading, +230 mesh
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, ACS reagent, meets USP testing specifications, Excise Tax-free, Permit for use required
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, ACS reagent, meets USP testing specifications, Excise Tax-free, Permit for use required
Sigma-Aldrich
Ethyl alcohol, Pure, 160 proof, Excise Tax-free, Permit for use required
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, for molecular biology
Sigma-Aldrich
Glycerol, ReagentPlus®, ≥99.0% (GC)
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, ACS reagent, ≥99.5%
Sigma-Aldrich
Ethanol, puriss., meets analytical specification of Ph. Eur., BP, 96% (v/v)
Sigma-Aldrich
Glycerol, puriss. p.a., ACS reagent, anhydrous, dist., ≥99.5% (GC)
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, HPLC/spectrophotometric grade
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, meets USP testing specifications
Sigma-Aldrich
Ethanol, puriss. p.a., absolute, ≥99.8% (GC)
Sigma-Aldrich
Glycerol, ACS reagent, ≥99.5%
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, for molecular biology
Sigma-Aldrich
Ethanol, purum, absolute ethanol, denaturated with 4.8% isopropanol, A15 IPA1, ≥99.8% (based on denaturant-free substance)
Sigma-Aldrich
Ethanol, purum, fine spirit, denaturated with 4.8% methanol, F25 METHYL1, ~96% (based on denaturant-free substance)
Sigma-Aldrich
Ethanol, purum, absolute ethanol, denaturated with 1% cyclohexane, A15 CYCLO1, ≥99.8% (based on denaturant-free substance)
Sigma-Aldrich
Ethanol, ACS reagent, prima fine spirit, without additive, F15 o1
Sigma-Aldrich
Ethanol, purum, absolute ethanol, denaturated with 2% 2-butanone, A15 MEK1, ≥99.8% (based on denaturant-free substance)