Team:Newcastle/Scanning EM

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Scanning EM

This is a standard method for preparing samples for Scanning Electron Microscopy. Specimens vary greatly and the final protocol should be decided by referring to text books and publications.

Fixation

Fix in 2% Gluteraldehyde in Sorensons Phosphate Buffer overnight (minimum).

Rinse in Sorensons Phosphate Buffer 2x 15 mins.

Dehydration

  • 25% ethanol: 30 mins.
  • 50% ethanol: 30 mins.
  • 75% ethanol: 30 mins.
  • 100% ethanol: 1 hr.
  • 100% ethanol: 1 hr.

Once in 100% ethanol, samples are dried using a Baltec Critical Point Dryer.

Mounting

Mount on an aluminium stub with Achesons Silver ElectroDag.

Gold coating

Coat with 15 nm of gold using a Polaron SEM Coating Unit.

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