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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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Fast time-resolved electrostatic force microscopy: Achieving sub-cycle time resolution.

Durmus U Karatay1, Jeffrey S Harrison1, Micah S Glaz1

  • 1Department of Chemistry, University of Washington, Seattle, Washington 98195, USA.

The Review of Scientific Instruments
|June 3, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces fast time-resolved electrostatic force microscopy to measure nanosecond dynamics using atomic force microscopy. This breakthrough enables new scientific insights in biology and semiconductor physics.

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Area of Science:

  • Physics
  • Materials Science
  • Nanotechnology

Background:

  • Current scanning probe instruments are limited to millisecond-to-second timescale measurements.
  • Measuring microsecond- and nanosecond-scale dynamics below the diffraction limit is crucial for various scientific fields.

Purpose of the Study:

  • To implement and detail a fast time-resolved electrostatic force microscopy technique.
  • To enable the measurement of fast local dynamics on samples using atomic force microscopy hardware.

Main Methods:

  • Utilizing an oscillating cantilever to measure local dynamics after a sample perturbation.
  • Employing photothermal excitation over piezoacoustic excitation to reduce cantilever noise.
  • Analyzing the phase of the oscillating cantilever relative to the perturbation event for sub-cycle time resolution.

Main Results:

  • Achieved reliable sub-cycle time resolution by controlling cantilever phase.
  • Demonstrated discrimination of signal rise times as fast as 10 nanoseconds.
  • Showcased simultaneous data acquisition and analysis for enhanced image acquisition speeds.

Conclusions:

  • Fast time-resolved electrostatic force microscopy provides a powerful tool for studying ultrafast dynamics.
  • The developed method significantly enhances the capabilities of atomic force microscopy for nanoscale investigations.
  • This technique opens new avenues for research in diverse scientific disciplines requiring high temporal resolution.