Fluidic delivery of homogeneous solutions through carbon tube bundles

R. Srikar, Alexander Yarin, C. M. Megaridis

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A wide array of technological applications requires localized high-rate delivery of dissolved compounds (in particular, biological ones), which can be achieved by forcing the solutions or suspensions of such compounds through nanoor microtubes and their bundled assemblies. Using a water-soluble compound, the fluorescent dye Rhodamine 610 chloride, frequently used as a model drug release compound, it is shown that deposit buildup on the inner walls of the delivery channels and its adverse consequences pose a severe challenge to implementing pressure-driven long-term fluidic delivery through nanoand microcapillaries, even in the case of such homogeneous solutions. Pressure-driven delivery (3-6bar) of homogeneous dye solutions through macroscopically-long (∼1cm) carbon nanoand microtubes with inner diameters in the range 100nm-1νm and their bundled parallel assemblies is studied experimentally and theoretically. It is shown that the flow delivery gradually shifts from fast convection-dominated (unobstructed) to slow jammed convection, and ultimately to diffusion-limited transport through a porous deposit. The jamming/clogging phenomena appear to be rather generic: they were observed in a wide concentration range for two fluorescent dyes in carbon nano and microtubes, as well as in comparable transparent glass microcapillaries. The aim of the present work is to study the physics of jamming, rather than the chemical reasons for the affinity of dye molecules to the tube walls.

Original languageEnglish
Article number275706
JournalNanotechnology
Volume20
Issue number27
DOIs
Publication statusPublished - 2009 Jul 1
Externally publishedYes

Fingerprint

Fluidics
Convection
Carbon
Dyes
Jamming
Fluorescent Dyes
Coloring Agents
Deposits
Pressure
Rhodamines
Physics
Glass
Chlorides
Suspensions
Molecules
Water
Pharmaceutical Preparations

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Fluidic delivery of homogeneous solutions through carbon tube bundles. / Srikar, R.; Yarin, Alexander; Megaridis, C. M.

In: Nanotechnology, Vol. 20, No. 27, 275706, 01.07.2009.

Research output: Contribution to journalArticle

Srikar, R. ; Yarin, Alexander ; Megaridis, C. M. / Fluidic delivery of homogeneous solutions through carbon tube bundles. In: Nanotechnology. 2009 ; Vol. 20, No. 27.
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