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

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have demonstrated a visualization method of carbon nanotubes (CNTs) in water with fluorescent microscopy by using fluorescent dye background conditions that display a reversal contrast. We have successfully observed 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
Title of host publication2007 International Symposium on Micro-NanoMechatronics and Human Science, MHS
Pages231-236
Number of pages6
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 International Symposium on Micro-NanoMechatronics and Human Science, MHS - Nagoya, Japan
Duration: 2007 Nov 112007 Nov 14

Publication series

Name2007 International Symposium on Micro-NanoMechatronics and Human Science, MHS

Conference

Conference2007 International Symposium on Micro-NanoMechatronics and Human Science, MHS
CountryJapan
CityNagoya
Period07/11/1107/11/14

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Networks and Communications
  • Human-Computer Interaction
  • Electrical and Electronic Engineering

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  • Cite this

    Arai, F., Inomata, N., Ookawara, R., Yamanishi, Y., & Lin, Y. C. (2007). Observation of carbon nanotubes in water by supplying fluorescent reagent with porous structured PDMS supports. In 2007 International Symposium on Micro-NanoMechatronics and Human Science, MHS (pp. 231-236). [4420858] (2007 International Symposium on Micro-NanoMechatronics and Human Science, MHS). https://doi.org/10.1109/MHS.2007.4420858