Category: Specimen Preparation

Specimen Prep in Electron Optics

Attn: Sputter Coater User

The target on the sputter coater has worn out. A new target has been ordered and is expected within 6-10 business days. The target has temporarily been changed to Iridium.

There are special directions for using the Ir target (see detailed instructions below).

Target density: 22.42
Current: 20mA
Coating thickness: 1-3nm

Your two other options are:

1) We have a Cr target. However, in the past that has resulted in charging.

2) As soon as next week, you can start to schedule time with our staff on the Apreo2. Uncoated samples can be imaged using variable pressure mode. VP mode utilizes a gas in the sample chamber as a charge dissipation and signal amplification method, allowing analysis of a sample without preparation in the form of a conductive coating.

STEM Users – TEM grids (updates)

Just letting you know I put the TEM grids back in my office (MM622).

If are in need of TEM grids let me know.

Those are the ones we currently have available:

  • Continuum C-film on copper 
  • Continuum C-film in nickel
  • Lacey C-film on copper 
  • Silicon oxide Film on copper
  • Formvar Carbon single 
  • Formvar supported lacey C-film on copper
  • Quantifoil C-film on copper
  • Graphene supported Lacey C-film on copper

Erico Freitas

SEM Sample Coating Procedure

This is to inform you about the recent updates made to the SEM sample coating procedure in order to streamline the process and enhance its efficiency.

To have your samples coated, please drop them off at the image analysis lab (M&M 631) in the designated desiccator. Samples should be labeled with your name, email address, and any special instructions. If necessary, you can find labels within the desiccator. Labeled samples should be placed in the intake section of the dessicator. Once samples have been left, please fill out the Training/Coating Questionnaire to notify ACMAL staff of your sample. 

Allow 2 days for us to coat your samples. Once completed your samples will be returned to the desiccator on the “Ready” shelf and we will send you an email.