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Updated: Jul 17, 2026

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Diamond-like carbon coating on micropipettes.

N Kakuta1, N Okuyama, M Watanabe

  • 1Dept. of Mech. Eng. & Intelligent Syst., Univ. of Electro-Commun., Chofu, Japan.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|February 3, 2007
PubMed
Summary

Researchers developed a new diamond-like carbon (DLC) coating method for micropipette microsensor probes. This technique effectively creates high-quality insulating films crucial for bioengineering and medical applications.

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Area of Science:

  • Bioengineering
  • Materials Science
  • Microfabrication

Background:

  • Microsensor probes, essential in bioengineering and medicine, often require electrically insulating films.
  • Coating microacute probes like micropipettes with high-quality, durable insulating films, especially at the tip, presents significant challenges.

Purpose of the Study:

  • To develop an effective method for applying diamond-like carbon (DLC) insulating films to micropipette-based microsensor probes.
  • To address the difficulties in coating microacute probe tips with robust insulating layers.

Main Methods:

  • Utilized plasma chemical vapor deposition (PCVD) for DLC coating.
  • Employed a deposition apparatus where the micropipette served as the cathode and a mesh cylinder as the anode.
  • Implemented intermittent voltage application to manage tip temperature during film growth.

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Main Results:

  • Successfully deposited diamond-like carbon (DLC) films on micropipette tips.
  • Raman spectroscopy confirmed the film composition as DLC.
  • Electrical resistivity measurements validated the film's effectiveness as an electrical insulator.

Conclusions:

  • The developed intermittent plasma chemical vapor deposition method is suitable for creating high-quality DLC insulating films on micropipette probes.
  • This DLC coating technique offers a viable solution for microprobe fabrication in bioengineering and medical fields.