Observation of carbon nanotubes in water by supplying fluorescent reagent from porous structured PDMS supports

Naoki Inomata, Yoko Yamanishi, Ryuto Ookawara, Yu Ching Lin, Fumihito Arai

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We demonstrate visualization of carbon nanotubes (CNTs) in water with fluorescent microscopy by using fluorescent dye background conditions that display a reversal contrast. We could observe CNTs under a constant excitation light for more than ten minutes. We have developed novel chip system to supply fluorescence dye with appropriate concentration. The salt reaching method has been applied to PDMS (poly-dimethyl siloxane) in order to obtain porous structures. We have found that this porous structure provides homogeneous concentration of fluorescence dye by putting it in water and found out porous-PDMS support with larger porous gives a higher and steady concentration. The fine control of the concentration of the fluorescence dye in the microchannel has been achieved with a controlled speed of flow and mixture by means of a micro magnetic stirrer. Dielectrophoretic force was used for CNTs deposition onto electrodes that consist of transparent conductive film. It was confirmed that the proposed microfluidic system controls the concentration of fluorescent dye for a long term observation in water and is useful to apply CNTs to several biological application fields.

Original languageEnglish
Pages (from-to)1879-1886
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume74
Issue number7
Publication statusPublished - Jul 2008
Externally publishedYes

Fingerprint

Carbon nanotubes
Dyes
Fluorescence
Water
Conductive films
Microchannels
Microfluidics
Microscopic examination
Visualization
Salts
Control systems
Electrodes

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering

Cite this

Observation of carbon nanotubes in water by supplying fluorescent reagent from porous structured PDMS supports. / Inomata, Naoki; Yamanishi, Yoko; Ookawara, Ryuto; Lin, Yu Ching; Arai, Fumihito.

In: Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, Vol. 74, No. 7, 07.2008, p. 1879-1886.

Research output: Contribution to journalArticle

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