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Related Concept Videos

Overview of Microscopy Techniques01:22

Overview of Microscopy Techniques

The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...
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An alternative flat scanner and micropositioning method for scanning probe microscope.

Wei Cai1, Guangyi Shang, Yusheng Zhou

  • 1Department of Applied Physics, Beihang University, Beijing 100191, People's Republic of China.

The Review of Scientific Instruments
|January 5, 2011
PubMed
Summary
This summary is machine-generated.

A novel flat scanner integrates scanning probe microscopy with optical microscopy, enabling robust sample manipulation for advanced imaging applications.

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Area of Science:

  • Instrumentation and Measurement
  • Microscopy and Imaging
  • Materials Science

Background:

  • Combining scanning probe microscopy (SPM) with inverted optical microscopy (IOM) offers synergistic advantages for nanoscale imaging.
  • Existing scanners may have limitations in sample load capacity, scanning range, or micropositioning reliability.
  • Precise sample manipulation is crucial for high-resolution imaging and multi-modal microscopy.

Purpose of the Study:

  • To present an alternative flat scanner designed for integrating SPM with IOM.
  • To detail the novel structural design and its capabilities for sample handling and precise movement.
  • To demonstrate the performance of the scanner in a custom-built SPM-IOM system.

Main Methods:

  • The scanner utilizes a novel structure comprising eight piezoelectric tubes, metal flexure beams, and a sample mount.
  • A specially designed structure allows the scanner to support sample loads exceeding 120 g.
  • A new sample micropositioning method employing pulsed voltage on piezotubes achieves reliable z-axis motion for stick-slip control.

Main Results:

  • The scanner achieves a scanning range of over 30 μm in three dimensions with ±150 V applied voltages.
  • Reliable sample translation with step lengths from approximately 700 nm to 9 μm over several millimeters was accomplished.
  • A functional scanning probe microscope-inverted optical microscope system was successfully constructed and tested.

Conclusions:

  • The developed flat scanner offers a robust and versatile platform for combined SPM-IOM systems.
  • The novel design enhances sample load capacity and enables precise, reliable micropositioning.
  • The experimental results validate the system's performance for advanced microscopy applications.