Microscale fibre alignment by a three-dimensional sessile drop on a wettable pad

S. N. Reznik, W. Salalha, Alexander Yarin, E. Zussman

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Fluidic assembly provides solutions for assembling particles with sizes from nanometres to centimetres. Fluidic techniques based on patterned shapes of monolayers and capillary forces are widely used to assemble microfabrication devices. Usually, for self-assembly, the precondition is that the components must be mobile in a fluidic environment. In the present work, a shape-directed fluidic self-assembly of rod-like microstructures, such as an optical fibre on a wettable pad is demonstrated experimentally with submicrometre positioning precision. A model of the process is proposed, which accounts for the following two stages of the orientation of a fibre submerged in a sessile drop: (i) the drop melting and spreading over a wettable pad; (ii) fibre reorientation related to the surface-tension-driven shrinkage of the drop surface area. At the end of stage (ii), the fibre is oriented along the pad. The experimental results for the optical-fibre assembly by a solder joint have been compared to the modelling results, and a reasonable agreement has been found. The major outcome of the experiments and modelling is that surface tension forces on the fibre piercing a drop align the fibre rather than the flow owing to the spreading of the drop over the horizontal pad, i.e. stage (ii) mostly contributes to the alignment.

Original languageEnglish
Pages (from-to)179-207
Number of pages29
JournalJournal of Fluid Mechanics
Volume574
DOIs
Publication statusPublished - 2007 Mar 10
Externally publishedYes

Fingerprint

microbalances
fluidics
Fluidics
alignment
fibers
Fibers
Self assembly
Surface tension
self assembly
Optical fibers
interfacial tension
assembly
optical fibers
piercing
Piercing
Microfabrication
solders
assembling
shrinkage
Soldering alloys

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Microscale fibre alignment by a three-dimensional sessile drop on a wettable pad. / Reznik, S. N.; Salalha, W.; Yarin, Alexander; Zussman, E.

In: Journal of Fluid Mechanics, Vol. 574, 10.03.2007, p. 179-207.

Research output: Contribution to journalArticle

Reznik, S. N. ; Salalha, W. ; Yarin, Alexander ; Zussman, E. / Microscale fibre alignment by a three-dimensional sessile drop on a wettable pad. In: Journal of Fluid Mechanics. 2007 ; Vol. 574. pp. 179-207.
@article{0d26ab59571e438897700cd309820bce,
title = "Microscale fibre alignment by a three-dimensional sessile drop on a wettable pad",
abstract = "Fluidic assembly provides solutions for assembling particles with sizes from nanometres to centimetres. Fluidic techniques based on patterned shapes of monolayers and capillary forces are widely used to assemble microfabrication devices. Usually, for self-assembly, the precondition is that the components must be mobile in a fluidic environment. In the present work, a shape-directed fluidic self-assembly of rod-like microstructures, such as an optical fibre on a wettable pad is demonstrated experimentally with submicrometre positioning precision. A model of the process is proposed, which accounts for the following two stages of the orientation of a fibre submerged in a sessile drop: (i) the drop melting and spreading over a wettable pad; (ii) fibre reorientation related to the surface-tension-driven shrinkage of the drop surface area. At the end of stage (ii), the fibre is oriented along the pad. The experimental results for the optical-fibre assembly by a solder joint have been compared to the modelling results, and a reasonable agreement has been found. The major outcome of the experiments and modelling is that surface tension forces on the fibre piercing a drop align the fibre rather than the flow owing to the spreading of the drop over the horizontal pad, i.e. stage (ii) mostly contributes to the alignment.",
author = "Reznik, {S. N.} and W. Salalha and Alexander Yarin and E. Zussman",
year = "2007",
month = "3",
day = "10",
doi = "10.1017/S0022112006004009",
language = "English",
volume = "574",
pages = "179--207",
journal = "Journal of Fluid Mechanics",
issn = "0022-1120",
publisher = "Cambridge University Press",

}

TY - JOUR

T1 - Microscale fibre alignment by a three-dimensional sessile drop on a wettable pad

AU - Reznik, S. N.

AU - Salalha, W.

AU - Yarin, Alexander

AU - Zussman, E.

PY - 2007/3/10

Y1 - 2007/3/10

N2 - Fluidic assembly provides solutions for assembling particles with sizes from nanometres to centimetres. Fluidic techniques based on patterned shapes of monolayers and capillary forces are widely used to assemble microfabrication devices. Usually, for self-assembly, the precondition is that the components must be mobile in a fluidic environment. In the present work, a shape-directed fluidic self-assembly of rod-like microstructures, such as an optical fibre on a wettable pad is demonstrated experimentally with submicrometre positioning precision. A model of the process is proposed, which accounts for the following two stages of the orientation of a fibre submerged in a sessile drop: (i) the drop melting and spreading over a wettable pad; (ii) fibre reorientation related to the surface-tension-driven shrinkage of the drop surface area. At the end of stage (ii), the fibre is oriented along the pad. The experimental results for the optical-fibre assembly by a solder joint have been compared to the modelling results, and a reasonable agreement has been found. The major outcome of the experiments and modelling is that surface tension forces on the fibre piercing a drop align the fibre rather than the flow owing to the spreading of the drop over the horizontal pad, i.e. stage (ii) mostly contributes to the alignment.

AB - Fluidic assembly provides solutions for assembling particles with sizes from nanometres to centimetres. Fluidic techniques based on patterned shapes of monolayers and capillary forces are widely used to assemble microfabrication devices. Usually, for self-assembly, the precondition is that the components must be mobile in a fluidic environment. In the present work, a shape-directed fluidic self-assembly of rod-like microstructures, such as an optical fibre on a wettable pad is demonstrated experimentally with submicrometre positioning precision. A model of the process is proposed, which accounts for the following two stages of the orientation of a fibre submerged in a sessile drop: (i) the drop melting and spreading over a wettable pad; (ii) fibre reorientation related to the surface-tension-driven shrinkage of the drop surface area. At the end of stage (ii), the fibre is oriented along the pad. The experimental results for the optical-fibre assembly by a solder joint have been compared to the modelling results, and a reasonable agreement has been found. The major outcome of the experiments and modelling is that surface tension forces on the fibre piercing a drop align the fibre rather than the flow owing to the spreading of the drop over the horizontal pad, i.e. stage (ii) mostly contributes to the alignment.

UR - http://www.scopus.com/inward/record.url?scp=33847025710&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847025710&partnerID=8YFLogxK

U2 - 10.1017/S0022112006004009

DO - 10.1017/S0022112006004009

M3 - Article

VL - 574

SP - 179

EP - 207

JO - Journal of Fluid Mechanics

JF - Journal of Fluid Mechanics

SN - 0022-1120

ER -