Can anyone tell me what are the similarity and difference between XRD of amorphous and Nanomaterials .Is there by any means XRD of a nanomaterial of very small size can approach to that of amorphous? how and why?
Dear Alaka Panda:
Amorphous material - isotropic material, the crystalline material - material is anisotropic. The XRD using Bragg law. Tracking the sharp peaks in the spectrum for the crystalline sample and Gallo amorphous regions. The nanoparticles may be crystalline and amorphous. In crystalline nanomaterials regular structure. Ablation method on the surface of nanoparticles TiO2 can be obtained an amorphous structure, to increase the rutile content of the anatase or reverse. Perhaps you will find methods for the synthesis of crystal structure change in the amorphous. It briefly. To fully understand the need to read textbooks.
Best regards.
X-Ray Diffraction pattern of amorphous material will be having a very broad hump, spanning over tens of two theta values. XRD pattern of nanomaterials will be similar to XRD pattern of same bulk material, only peaks will be broadened.
Be careful while attributing the peak broadening to particle size reduction as strain also contribute in peak broadening.
Thank you for the valuable answers. In my case the as prepared nanomaterial sample XRD has amorphous behaviour which donot extend to tens of 2 theta but the distribution looks like it is broadened in the range where bulk sample has major peaks.So what should I conclude from this?
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