Youtor
XRD Vs XRF
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=9P8t3qwrFI0
Both XRD and XRF are useful techniques to characterize any nanomaterials. • XRD stands for X-rays diffraction, also use the term pXRD, which means powder XRD. • XRF stands for X-rays fluorescence. • There are many differences between XRD and XRF analysis, but I will only discuss the most important ones: • ....................-----------................--------------................... • 1. XRD determines the mineralogy such as rocks, minerals, oxide materials. For instance, TiO2, ZnO, NaCl, CaCO3, etc. while XRF Analyzes the Chemistry • 2. XRD identify phases while XRF analyzes the chemical composition • 3. XRD is used for the compound analysis, while XRF is used for elemental analysis • 4. XRD analyzes the compounds such as the different phases of Ca*, CaCO3, Ca(OH)2 while the XRF only reveals about the concentration of *Ca in these compounds • 5. Similarly, XRD reveals about he the Fe phases like Fe2O3, Fe3C, whereas the XRF provides the details information about the concentration of Fe in the sample. • XRF: X-Ray Fluorescence, the details video on the XRF analysis is available on the below link • • XRF: X-ray Fluorescence Analysis • XRF is a useful technique in nanomaterials characterization. • Applications: • To analyze the film thickness and elemental composition (qualitative quantitative) • Qualitative analysis: • It means that the XRF analysis reveals the elements that exist, such as Pb, Fe, Co, Cu, Ag, etc. • Quantitative analysis: • It means that the XRF analysis reveals the existing elements in terms of atom% or wt%. • XRF is a non-destructive technique. • A Non-destructive technique means that the sample can be analyzed again and again. Such techniques don’t destroy the sample. • As the XRF working principle is based on the emission of light so let's first discuss the fluorescence. • Fluorescence: • It is basically the emission of light (in this case, X-rays) by a substance that has absorbed X-rays. In most cases, the emitted light has a longer wavelength than the absorbed radiation. • Working Principle: • When atoms in a sample are bombarded with X-rays, inner- shell electrons knocked out, and immediately, the electrons from outer shells drop down to fill the vacant position of the atoms. As a result, energy is produced, some of which are in the form of X-rays. Each element has its own unique X-ray characteristics, so the emitted X-rays from a sample can provide qualitative and quantitative compositional information about the sample.
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