Faculty of Science, Agriculture & Engineering

Scanning Electron Microscopy - SEM

SEM

SEM_MASTHEAD_1

Overview

Scanning electron microscopy (SEM) enables imaging of a surface using an electron beam.

By using a variety of detectors topographic images, atomic number (Z) contrast images and element composition information can be obtained from the specimen.

Our capabilities:

Digital Imaging:

  • over a range of magnifications depending on sample quality (~ X20 to X300 000), in the following modes
  • secondary electron emission (SEI) - ideal for materials with surface relief and/or multiple faces
  • backscattered electron (BSE) - best suited to thin section work

Energy Dispersive X-ray Spectroscopy (EDS or EDX):

  • EDX detectors allow the ID and semi-quantification of elements from carbon (C) upwards
  • output is in the form of spot/point data, average area measurements or single element digi-mapping (using X-ray intensity distribution)

Low Vacuum (LV):

  • mode for sensitive samples or those not appropriate for carbon or gold coating (typically used to improve conductivity)

If you have questions about the SAgE Analytical Facility or would like to request a quote, contact us.

Services

Scanning electron microscopy (SEM) enables analysis of the surface of a sample using an electron beam. The electron beam interacts with the surface of the sample and a number of signals are emitted from the sample. By using a variety of detectors located in the main chamber of the microscope these signals can be captured and topographic images, atomic-number (Z) contrast images and elemental composition information can be obtained from the specimen.

Our electron microscope offers the following analytical capabilities:

 

Applications

SAgE Analytical has a wealth of experimental knowledge and capabilities in all of our techniques. Please browse our applications below which intend to focus on typical areas of interest and bespoke experimental needs.

If you have questions about the SAgE Analytical Facility or would like to request a quote, contact us.

Staff

Dr Alasdair Charles
Director of SAgE Faculty Foundation Year/Lecturer

Contact us

If you have questions about the SAgE Analytical Facility or would like to request a quote, contact us.