Fluid interfacial nanoroughness measurement through the morphological characteristics of graphene

Hong Min Yoon, Jung Shin Lee, Jong-Souk Yeo, Joon Sang Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The interfacial nanoroughness of liquid plays an important role in the reliability of liquid lenses, capillary waves, and mass transfer in biological cells [Grilli et al., Opt. Express 16, 8084 (2008), Wang et al., IEEE Photon. Technol. Lett. 18, 2650 (2006), and T. Fukuma et al., 92, 3603 (2007)]. However, the nanoroughness of liquid is hard to visualize or measure due to the instability and dynamics of the liquid-gas interface. In this study, we blanket a liquid water surface with monolayer graphene to project the nanoroughness of the liquid surface. Monolayer graphene can project the surface roughness because of the extremely high flexibility attributed to its one atomic thickness. The interface of graphene and water is successfully mimicked by the molecular dynamics method. The nanoroughness of graphene and water is defined based on density distribution. The correlation among the roughness of graphene and water is developed within a certain temperature range (298-390 K). The results show that the roughness of water surface is successfully transferred to graphene surface. Surface tension is also calculated with a simple water slab. The rise of temperature increased the roughness and decreased the surface tension. Finally, the relationship between graphene roughness and surface tension is fitted with a second-order polynomial equation.

Original languageEnglish
Article number052113
JournalBiomicrofluidics
Volume8
Issue number5
DOIs
Publication statusPublished - 2014 Oct 16

Fingerprint

Graphite
Graphene
graphene
Fluids
fluids
Surface roughness
Surface Tension
Water
Liquids
roughness
Surface tension
liquids
interfacial tension
surface water
water
Monolayers
capillary waves
Temperature
blankets
liquid surfaces

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Materials Science(all)
  • Genetics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

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Fluid interfacial nanoroughness measurement through the morphological characteristics of graphene. / Yoon, Hong Min; Lee, Jung Shin; Yeo, Jong-Souk; Lee, Joon Sang.

In: Biomicrofluidics, Vol. 8, No. 5, 052113, 16.10.2014.

Research output: Contribution to journalArticle

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