Xrd- thickness of sample?how?

[kimmylsm]

In XRD, to examine the diffraction pattern and the determine the elemental structure, a thin layer of sample is deposit on a substrate. since x ray penetrate deeper than electron, how the thickness of the sample will affect the XRD result? how do know what is the appropriate thickness to deposit in order to obtain a good result?

 

[Modey3]

Look up the theory for Kinematical Diffraction. Thin samples ( < 1 micron) cause the diffraction peaks to broaden due to incomplete wave destruction of the off-Bragg angles.

 

[charng]

The thickness of the sample in X-ray diffraction (XRD) plays a critical role in obtaining accurate and reliable results. This is because the penetration depth of X-rays is much greater than that of electrons, and a thicker sample can potentially obscure the diffraction pattern and make it difficult to determine the elemental structure.

To ensure the best results, it is important to deposit a thin layer of sample on the substrate. The appropriate thickness of the sample will depend on the material being analyzed and the desired resolution of the diffraction pattern. Generally, a thickness of 10-100 micrometers is recommended for most materials.

To determine the appropriate thickness of the sample, several factors need to be considered, such as the type of material, its crystalline structure, and the properties of the X-ray source being used. Additionally, the thickness of the sample can also be adjusted during the analysis to optimize the diffraction pattern.

In summary, the thickness of the sample in XRD is a crucial factor in obtaining accurate and meaningful results. Careful consideration and adjustment of the sample thickness is necessary to ensure the best possible outcome in XRD analysis.