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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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Updated: May 8, 2026

Scanning-probe Single-electron Capacitance Spectroscopy
10:53

Scanning-probe Single-electron Capacitance Spectroscopy

Published on: July 30, 2013

Continuous capacitance-voltage spectroscopy mapping for scanning microwave microscopy.

M Moertelmaier1, H P Huber, C Rankl

  • 1Agilent Technologies Austria GmbH, Measurement Research Laboratory, Gruberstrasse 40, 4020 Linz, Austria.

Ultramicroscopy
|September 10, 2013
PubMed
Summary
This summary is machine-generated.

A novel scanning sawtooth capacitance spectroscopy (SSCS) method generates capacitance/voltage (C-V) maps using a scanning microwave microscope. This technique rapidly acquires thousands of C-V curves for semiconductor and other material characterization.

Keywords:
Capacitance–voltage curvesC–V spectroscopy mappingScanning microwave microscopy

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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

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

Published on: January 19, 2018

Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Science

Background:

  • Capacitance/voltage (C-V) spectroscopy is crucial for characterizing semiconductor properties.
  • Traditional C-V measurements can be time-consuming and limited in spatial resolution.
  • Scanning probe microscopy offers high spatial resolution but often lacks direct electrical property mapping.

Purpose of the Study:

  • To introduce a new method, scanning sawtooth capacitance spectroscopy (SSCS), for rapid C-V mapping.
  • To demonstrate the capability of SSCS for high-resolution electrical characterization of materials.
  • To enable efficient acquisition of numerous C-V curves from diverse samples.

Main Methods:

  • Utilized a scanning microwave microscope (SMM) operating at 1-20 GHz.
  • Applied a low-frequency (20-100 Hz) sawtooth voltage signal to the atomic force microscope (AFM) tip during scanning.
  • Acquired calibrated capacitance data pixel-by-pixel, correlating each capacitance value with the simultaneously recorded voltage.
  • Constructed virtual C-V curves by combining data from adjacent pixels, assuming voltage smoothness.

Main Results:

  • Successfully generated C-V maps by acquiring approximately 26,000 C-V curves within minutes.
  • Demonstrated the method's efficacy on n-type and p-type silicon semiconductor samples.
  • Validated the SSCS technique for high-throughput electrical characterization at the nanoscale.

Conclusions:

  • SSCS provides a rapid and efficient approach for nanoscale C-V mapping.
  • The method is versatile and applicable to various materials, including semiconductors, novel materials, and bio-membranes.
  • SSCS significantly enhances the speed and data density of C-V measurements compared to conventional techniques.