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Related Concept Videos

Scanning Electron Microscopy01:07

Scanning Electron Microscopy

A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
Fundamental Principles
Accelerated...
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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Probing Surface Electrochemical Activity of Nanomaterials using a Hybrid Atomic Force Microscope-Scanning Electrochemical Microscope (AFM-SECM)
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Lithography by Scanning Electrochemical Microscopy with a multiscaled electrode.

Frédérique Deiss1, Catherine Combellas, Christian Fretigny

  • 1Groupe Nanosystèmes Analytiques, Institut des Sciences Moléculaires, CNRS UMR 5255, Université Bordeaux 1, ENSCPB, 16 avenue Pey-Berland, 33607 Pessac, France.

Analytical Chemistry
|May 22, 2010
PubMed
Summary

A novel multiscaled electrochemical probe for Scanning Electrochemical Microscopy (SECM) was developed. This probe enables precise electrochemical patterning of surfaces by utilizing its unique nanotip array and controlled potential pulses.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Surface Science

Background:

  • Scanning Electrochemical Microscopy (SECM) is a powerful technique for surface analysis.
  • Developing advanced probes is crucial for enhancing SECM capabilities and applications.

Purpose of the Study:

  • To present a novel multiscaled electrochemical probe for SECM.
  • To investigate the probe's properties and its effectiveness in electrochemical patterning.

Main Methods:

  • Fabrication using wet chemical etching and sputter-coating of optical fiber bundles.
  • Numerical simulations and approach curve analysis to study probe characteristics.
  • Electrochemical patterning of Teflon surfaces using the developed probe.

Main Results:

  • The probe's approach curves are independent of global shape but depend on the electroactive part's protuberance height.
  • Successful electrochemical transfer of nanotip patterns onto a non-conductive Teflon surface.
  • Control over reaction layer thickness via potential pulse time scales.

Conclusions:

  • The multiscaled probe offers distinct features for both probe positioning and electrochemical patterning.
  • This technology advances the precision and applicability of SECM for surface modification.