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Hypothesis: Accept or Fail to Reject?

Hypothesis: Accept or Fail to Reject?

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Related Experiment Video

Updated: Feb 15, 2026

In Situ Characterization of Boehmite Particles in Water Using Liquid SEM

In Situ Characterization of Boehmite Particles in Water Using Liquid SEM

Published on: September 27, 2017

Acceptance Angle Control for Improved Transmission Imaging in an SEM.

Jason Holm¹, Robert R Keller¹

¹National Institute of Standards and Technology, Applied Chemicals and Materials Division, 325 Broadway, Boulder, CO.

Microscopy Today

|January 30, 2018

Summary

A new modular aperture system offers cost-effective control for Scanning Transmission Electron Microscopy in Scanning Electron Microscopy (STEM-in-SEM) imaging. This versatile system enables various imaging modes, enhancing analytical capabilities.

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Last Updated: Feb 15, 2026

In Situ Characterization of Boehmite Particles in Water Using Liquid SEM

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Area of Science:

Materials Science
Electron Microscopy

Background:

Traditional Scanning Electron Microscopy (SEM) has limitations in high-resolution imaging.
Scanning Transmission Electron Microscopy (STEM) offers advanced imaging modes but requires specialized setups.

Purpose of the Study:

To introduce a simple, cost-effective modular aperture system for STEM-in-SEM.
To demonstrate comprehensive acceptance angle control for enhanced imaging.

Main Methods:

Development of a modular aperture system.
Integration into a Scanning Electron Microscope (SEM).
Testing with various samples and imaging modes.

Main Results:

The system provides precise control over acceptance angles.
Enabled conventional STEM modes: brightfield, high-angle annular darkfield (Z-contrast).
Facilitated thin annular detection and non-conventional imaging modes.

Conclusions:

The modular aperture system is a versatile and cost-effective solution for STEM-in-SEM.
It expands the imaging capabilities of conventional SEM instruments.
Offers improved analytical potential for materials characterization.