Pls tell me about Ag NPs Sample preparation for SEM, XRD, AFM. Actually we drop cast Ag NPs on Si wafer and heated for few minutes and gave for SEM analysis. We didnt observe particles clearly. Pls share your ideas regarding this, which would be helpful for my work. Thank you all.
I recommend the paper “Synthetic Routes for the Preparation of Silver Nanoparticles A Mechanistic Perspective” by Natalia L. Pacioni, Claudio D. Borsarelli, Valentina Rey and Alicia V. Veglia, https://www.springer.com/cda/content/document/cda_downloaddocument/9783319112619-c2.pdf?SGWID=0-0-45-1494789-p176975801
If you want to use powder XRD method then just remove dispersion medium from colloidal sample to obtain dry powder. Use this powder sample for XRD analysis. You can determine the crystal structure and crystallite size of your Ag NPs using Scherrer equation. For SEM analysis you have to dilute your Ag NPs dispersion properly. The dilute dispersion of Ag NPs can be dropped onto a very thin mica substrate. Then, remove excess dispersion from the mica sheet by agitations. Dry it in a vacuum desiccator then coat the mica sheet with suitable conducting materials(carbon or Pt) if your Ag NPs surface was coated with non-conducting materials. Now, use this coated sample for SEM analysis. Also for AFM analysis you can follow the same procedure of sampling. Best of luck.
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