1. The requirement is to do elemental mapping so that we can get compositions of DTS (donor) and PC71BM (acceptor) domains /intermixed regions.
2. We hope to look at the Carbon and the Sulfur Edges by doing EFTEM
3. If we use a Cu TEM grid with the carbon film the signal from the grid might affect the actual signal
so what is the better TEM grid to use ? and if we use a grid with a carbon film is there a possibility to subtract the signal/effect from the film so that we can isolate the actual signal from the active layer ?
If you are interested in carbon, then the best idea is to avoid carbon as a support :-) There are several other options commercially available, for instance Si: https://www.emsdiasum.com/microscopy/products/grids/si_window.aspx
I just realized that this could be misunderstood as an advertisement... Well, it's not, there are several suppliers around that stock either SiN or Si substrates for TEM. There are probably also other options, check their inventory for most suitable option.
https://www.tedpella.com/grids_html/silicon-nitride.htm https://www.tedpella.com/grids_html/silicon-dioxide.htm
Thank you very much Janez, I will look in to Si TEM grids.
We are required to conduct some C-AFM measurements on the same location of the grid prior to the TEM measurements. We realized that Carbon film works well for conductive afm measurements.
Is there a reliable way of removing the carbon signal caused by the TEM grid just in case I have to use a carbon coated grid.
I would recommend lacey carbon films, because the the low contrast of organics would completely disappaer on Si films
So... what about graphene TEM support grids then? Not sacrifice too much contrast, also C contribution to EDS would be almost negligible?
- https://www.tedpella.com/Support_Films_html/Graphene-TEM-Support-Film.htm
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