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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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Updated: Nov 26, 2025

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

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High-Pressure Scanning Tunneling Microscopy.

Miquel Salmeron1,2, Baran Eren3

  • 1Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States.

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|December 8, 2020
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Summary
This summary is machine-generated.

Surface structures of crystalline materials dynamically adapt to their environment under high gas pressures and ambient temperatures. New surface science explores these dynamic adaptations, particularly using high-pressure scanning tunneling microscopy.

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Area of Science:

  • Surface Science
  • Materials Science
  • Physical Chemistry

Background:

  • Surface structure is not solely an intrinsic material property but is influenced by the surrounding environment.
  • Recent advancements enable surface science studies under gas pressures ranging from mTorr to atmospheric levels.

Purpose of the Study:

  • To review recent studies on surface structures of crystalline materials under gas pressures.
  • To highlight the emergence of dynamic surface structures influenced by environmental conditions.
  • To focus on the role of high-pressure scanning tunneling microscopy in this new era of surface science.

Main Methods:

  • Review of recent studies.
  • Focus on high-pressure scanning tunneling microscopy (HP-STM).
  • Examination of surface structures under mTorr to atmospheric pressure ranges.

Main Results:

  • Surface structure dynamically adapts to the surrounding gas environment, leading to novel structures.
  • High/ambient pressure combined with ambient temperature facilitates dense surface coverage by weakly interacting species.
  • Ambient temperatures overcome activation barriers for diffusion and reactions, enabling structure reconstructions.

Conclusions:

  • Surface science is entering a new era characterized by dynamic surface structures adapting to environmental conditions.
  • High-pressure scanning tunneling microscopy is a key tool for investigating these phenomena.
  • Understanding these dynamic structures is crucial for various crystalline materials, including transition metals, oxides, and alloys.