Hi Selva,

You can get ideas of sample crystallinity (amorphous, single crystalline or polycrystalline) and different planes from SAED patterns of your samples.

1. Diffused continuous and thick ring indicating amorphous materials, whereas bright dotted ring indicating single crystalline materials and randomly dotted ring (almost unclear and overlapped ring) indicates polycrystalline materials. See examples in the attached image:

2. To find out the different planes, you need calculate radius (R) of each ring from your SAED patterns. Ring diameter = 2R and Radius = R/2. So, Inverse of R is d-spacing values. Each plane has different d-spacing value. So, matching d-spacing from your SAED patterns and d-spacing values from literatures, you can identify which ring indicates what plane. Generally, bigger ring means smaller d-spacing values, so plane shows up in smaller 2-theta in XRD patterns.

I think to know the core shell of material,

1.TEM image is important

2.BET surface area is also important-we can define using the result from the surface area of the composite

SAED patterns depict ideas about crystallographic information of a material and to determine types of materials which can be amorphous, single crystalline or Pollycrystalline.

1. Pollycrystalline materials exhibit ring pattern (randomly dotted ring)

2. Single crystalline material show spot pattern or bright dotted ring pattern

3. Diffused continuous and thick ring is the characteristic pattern of amorphous materials.

To get more details about SAED pattern go through the attached file.