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Related Concept Videos

Capillary Electrophoresis: Applications01:30

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Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
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Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Towards new applications using capillary waveguides.

Nicolino Stasio1, Atsushi Shibukawa1, Ioannis N Papadopoulos2

  • 1Laboratory of Optics, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland ; contributed equally.

Biomedical Optics Express
|December 30, 2015
PubMed
Summary
This summary is machine-generated.

This study enhances glass capillary sensing for minimally invasive endoscopy. Silica capillary waveguides enable high-resolution fluorescence and photoacoustic imaging, paving the way for advanced endoscopic devices.

Keywords:
(060.2350) Fiber optics imaging(070.5040) Phase conjugation(090.1995) Digital holography(170.2150) Endoscopic imaging

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Area of Science:

  • Biomedical Optics
  • Materials Science
  • Endoscopic Imaging

Background:

  • Glass capillaries possess unique optical and acoustic waveguide properties.
  • Existing endoscopic devices have limitations in resolution and invasiveness.

Purpose of the Study:

  • To enhance the sensing capabilities of glass capillaries for minimally invasive endoscopic applications.
  • To demonstrate the potential of silica capillary waveguides for multi-modal imaging.

Main Methods:

  • Utilized a 330 μm-thick silica capillary as both an optical and acoustic waveguide.
  • Employed digital phase conjugation for laser focusing and scanning.
  • Collected fluorescence and photoacoustic signals through the capillary.

Main Results:

  • Achieved optical-resolution photoacoustic imaging of a 30 μm nylon thread.
  • Obtained fluorescence images of 1.5 μm beads.
  • Demonstrated a fully passive endoscopic device.

Conclusions:

  • Silica capillary waveguides, combined with wavefront shaping, enable high-resolution, multi-modal endoscopic imaging.
  • This technology offers a pathway to advanced, minimally invasive diagnostic tools.