Stick-slip of evaporating droplets

Substrate hydrophobicity and nanoparticle concentration

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

Research output: Contribution to journalArticle

120 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)12834-12843
Number of pages10
JournalLangmuir
Volume27
Issue number21
DOIs
Publication statusPublished - Nov 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

Cite this

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

In: Langmuir, Vol. 27, No. 21, 01.11.2011, p. 12834-12843.

Research output: Contribution to journalArticle

Orejon, Daniel Mantecon ; Sefiane, Khellil ; Shanahan, Martin E.R. / Stick-slip of evaporating droplets : Substrate hydrophobicity and nanoparticle concentration. In: Langmuir. 2011 ; Vol. 27, No. 21. pp. 12834-12843.
@article{b24640bf03ce45c58548cad8ff68f586,
title = "Stick-slip of evaporating droplets: Substrate hydrophobicity and nanoparticle concentration",
abstract = "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.",
author = "Orejon, {Daniel Mantecon} and Khellil Sefiane and Shanahan, {Martin E.R.}",
year = "2011",
month = "11",
day = "1",
doi = "10.1021/la2026736",
language = "English",
volume = "27",
pages = "12834--12843",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "21",

}

TY - JOUR

T1 - Stick-slip of evaporating droplets

T2 - Substrate hydrophobicity and nanoparticle concentration

AU - Orejon, Daniel Mantecon

AU - Sefiane, Khellil

AU - Shanahan, Martin E.R.

PY - 2011/11/1

Y1 - 2011/11/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=80054937995&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80054937995&partnerID=8YFLogxK

U2 - 10.1021/la2026736

DO - 10.1021/la2026736

M3 - Article

VL - 27

SP - 12834

EP - 12843

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 21

ER -