Observation of on-chip electrophoresis microcapillary using confocal laser scanning microscopy

Shinichi Etoh, Tsuyoshi Fujimura, Reiji Hattori, Yukinori Kuroki

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Confocal laser scanning microscopy (CLSM) is used to observe a fluorescent sample in an on-chip electrophoresis microcapillary fabricated on a photosensitive glass. CLSM is a powerful tool for observing the sample inside a channel since it can capture fluorescence images sliced in the plane perpendicular to the optical axis and can vary the laser focal plane depth. In the photosensitive glass, since the UV-irradiated part of the glass has an etching rate 20 times higher than the other parts, we can obtain a channel structure with a high aspect ratio, which is valuable to the high-sensitivity detection of the signal. Inside the channel, it is found that the sample behavior at the middle depth of the channel differs from that at the top of the channel during the sample loading and electrophoresis. The CLSM observation can reveal the phenomena occurring inside the channel in detail.

Original languageEnglish
Pages (from-to)4093-4097
Number of pages5
JournalJapanese Journal of Applied Physics
Issue number6 B
Publication statusPublished - Jun 2003

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy


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