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Overview of Microscopy Techniques01:22

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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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Related Experiment Video

Updated: Oct 15, 2025

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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A time-shared switching scheme designed for multi-probe scanning tunneling microscope.

Jiahao Yan1, Jiajun Ma1, Aiwei Wang1

  • 1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China.

The Review of Scientific Instruments
|October 31, 2021
PubMed
Summary
This summary is machine-generated.

A new time-shared switching scheme enables seamless switching between multiple scanning tunneling microscope (STM) probes using a single control system. This cost-effective design enhances compatibility and flexibility for advanced material characterization.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Science

Background:

  • Conventional multi-probe scanning tunneling microscopy (STM) often requires independent control systems, leading to high costs and limited flexibility.
  • Integrating imaging and electrical transport measurements on a single platform is challenging.

Purpose of the Study:

  • To develop a time-shared switching scheme for seamless mode switching between multiple STM probes.
  • To enable shared control of STM probes and electrical transport characterization systems.
  • To create a cost-effective, compatible, flexible, and expandable multi-probe STM platform.

Main Methods:

  • Design of a time-shared switching scheme using switch units, switchable preamplifiers (SWPAs), high voltage amplifiers, and a main control unit.
  • Development of custom software with a graphical user interface for seamless probe switching.
  • Integration of ultra-high open circuit resistance (909 TΩ) SWPA switches for combined imaging and transport measurements.

Main Results:

  • Demonstrated millimeter-scale movement and atomic-scale resolution for individual STM probes.
  • Achieved safe approach of multiple STM probes beyond optical microscope resolution (1.1 µm).
  • Successfully performed combined STM imaging and accurate electrical transport characterization.

Conclusions:

  • The developed time-shared switching scheme offers a cost-effective, compatible, and flexible solution for multi-probe STM systems.
  • The scheme facilitates integrated imaging and electrical transport characterization with high throughput.
  • The design is easily upgradeable, paving the way for highly integrated characterization platforms.