We prepared magnetic nanoparticles (ferrites), and wanted to take FESEM images. The operator told us that FESEM cannot take images for magnetic nanoparticles, because the particles will be attached on the lenses. We tried one sample at low magnification but the images were very blurred.
What??? If this is true (which is not), neither in TEM somebody could see magnetic nanoparticles. We have seen a lot of times magnetic nanoparticles, clusters of magnetic nanoparticles etc in a JEOL FESEM in IESL-FORTH microscope. If everything is ok with the microscope and the images are still blurred then just put a thin gold layer on them and the images would be much better.
you try to just stick your particles in double stick carbon tape and try. Definitely you will get clear image. This tape is available all FESEM analyzing laboratories.
blurred image is because of organic residue, it's not because of 'magnetic' nanoparticles. Plz look my paper, I can take very clear image of ~10 nm magnetic nanoparticles.
By covering the samples with carbon or gold you can take image of the nanoparticles.
See my papers related with FE_SEM pictures of magnetic nanoparticles.
I disagree, you can take images without problem, provided they are attached to a grid, tape or similar. You can damage your microscope only with large magnetic particles, micron or millimeter-sized. Recipes like that of Dr Kanagesan can be used. You can also mix them to an epoxy cement and cut. Do not forget you need an electric contact to flush electrons away
Jus send them over. I shall get you the images. hahaha
Yeah at very high resolutions, you tend to have a bit of a problem imaging magnetic particles. I have sometimes seen that these particles if not fixed properly onto the carbon tape, jump around when you try to take an image. But, its a false statement to quote, you cannot image magnetic particles.
- Badges
- Science topic
- Similar topics
- Chemistry, Organic
- Organic