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Related Experiment Video

Updated: Apr 19, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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A high stability and repeatability electrochemical scanning tunneling microscope.

Zhigang Xia1, Jihao Wang1, Yubin Hou1

  • 1High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.

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|January 3, 2015
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Summary
This summary is machine-generated.

A novel, home-built electrochemical scanning tunneling microscope (ECSTM) achieves high stability and atomic resolution imaging in solution. This stable ECSTM minimizes drift and contamination, enabling precise electrochemical surface analysis.

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Area of Science:

  • Electrochemistry
  • Surface Science
  • Microscopy

Background:

  • Electrochemical scanning tunneling microscopy (ECSTM) is crucial for in-situ surface analysis.
  • Existing ECSTM systems can suffer from instability and drift, limiting resolution and measurement time.
  • Development of robust and stable ECSTM is essential for advancing electrochemical studies.

Purpose of the Study:

  • To design and construct a highly stable and repeatable home-built electrochemical scanning tunneling microscope (ECSTM).
  • To demonstrate atomic resolution imaging capabilities of the developed ECSTM in an electrochemical environment.
  • To evaluate the performance of the ECSTM in terms of drift rates and approach repeatability.

Main Methods:

  • Utilized a GeckoDrive type piezo motor with four rigid clamping points for the coarse approach mechanism.
  • Implemented controlled gas environment to minimize solvent evaporation and contamination.
  • Performed electrochemical measurements and atomic resolution imaging on a Au (111) electrode in solution.

Main Results:

  • Achieved exceptionally low drift rates in solution: 84 pm/min (XY) and 59 pm/min (Z).
  • Demonstrated repeatable coarse approaches with lateral deviation less than 50 nm over a 2 mm travel distance.
  • Obtained atomically resolved images of sulfate (SO4(2-)) on Au (111), showcasing high clarity without vibration isolation.

Conclusions:

  • The developed home-built ECSTM offers superior stability and repeatability for electrochemical surface analysis.
  • The instrument's performance allows for high-clarity atomic resolution imaging in solution, even without specialized isolation.
  • This ECSTM design provides a reliable platform for in-situ electrochemical studies, reducing contamination and extending measurement duration.