Dear Chandra Shekar ,
In the scanning electron microscope, besides using the standard secondary electrons detection, you can also take images with back-scattered electrons detection. The signal collected in the images formed with back-scattered electrons depends on the atomic number Z of the elements: higher Z produces a bigger number of back-scattered electrons detected. Consequently, the metallic nanoparticles can be clearly distinguished with brighter contrast than the ceramic or organic compound in the matrix. If the matrix is also metallic, they can also be distinguished if their atomic number is different enough. For instance, in Figures 2 and 3 of this paper we could easily distinguish Te nanorods (Z = 52) and Ti nanocolumns (Z = 22) on the images obtained with back-scattered electrons:
Article Synergic antibacterial coatings combining titanium nanocolum...
kindly check in the below picture. You can identify the reinforcement in matrix as well as its distribution. Thanking you.
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