Stick-slip of evaporating droplets: Substrate hydrophobicity and nanoparticle concentration

Daniel Mantecon Orejon, Khellil Sefiane, Martin E.R. Shanahan

研究成果: ジャーナルへの寄稿記事

122 引用 (Scopus)

抄録

The dynamics of the three-phase contact line for water and ethanol is experimentally investigated using substrates of various hydrophobicities. Different evolutions of the droplet profile (contact line, R, and contact angle, θ) are found to be dependent on the hydrophobicity of the substrate. A simple theoretical approach based on the unbalanced Young force is used to explain the depinning of the contact line on hydrophilic surfaces or the monotonic slip on hydrophobic substrates. The second part of the article involves the addition of different quantities of titanium oxide nanoparticles to water, and a comparison of the evaporative behavior of these novel fluids with the base liquid (water) on substrates varying in hydrophobicity (i.e., silicon, Cytop, and PTFE) is presented. The observed stick-slip behavior is found to be dependent on the nanoparticle concentration. The evaporation rate is closely related to the dynamics of the contact line. These findings may have an important impact when considering the evaporation of droplets on different substrates and/or those containing nanoparticles.

元の言語英語
ページ(範囲)12834-12843
ページ数10
ジャーナルLangmuir
27
発行部数21
DOI
出版物ステータス出版済み - 11 1 2011

Fingerprint

Stick-slip
Hydrophobicity
hydrophobicity
slip
Nanoparticles
nanoparticles
Substrates
Water
Evaporation
water
evaporation rate
Titanium oxides
Polytetrafluoroethylene
Silicon
Polytetrafluoroethylenes
titanium oxides
Contacts (fluid mechanics)
Contact angle
Ethanol
ethyl alcohol

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

これを引用

Stick-slip of evaporating droplets : Substrate hydrophobicity and nanoparticle concentration. / Orejon, Daniel Mantecon; Sefiane, Khellil; Shanahan, Martin E.R.

:: Langmuir, 巻 27, 番号 21, 01.11.2011, p. 12834-12843.

研究成果: ジャーナルへの寄稿記事

Orejon, DM, Sefiane, K & Shanahan, MER 2011, 'Stick-slip of evaporating droplets: Substrate hydrophobicity and nanoparticle concentration', Langmuir, 巻. 27, 番号 21, pp. 12834-12843. https://doi.org/10.1021/la2026736
Orejon, Daniel Mantecon ; Sefiane, Khellil ; Shanahan, Martin E.R. / Stick-slip of evaporating droplets : Substrate hydrophobicity and nanoparticle concentration. :: Langmuir. 2011 ; 巻 27, 番号 21. pp. 12834-12843.
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