Thursday, September 5, 2019

XRD for nanocrystals

Cool XRD instrument


Humans can perceive 400–700 nm electromagnetic waves. We call it “see.” Although humans cannot see the circulation of light, some insects can see the polarity of light. I am wondering who is the sexiest person if we could see the circulation of light, or if we have different ranges of wavelengths. Probably the sexiest person in human society might not be so sexy in a world where the circulation of light can be seen. The perspective of our lives will be literally changed.

If we could see X-ray, we may not have to use X-ray scanning at hospitals. Although we cannot see X-rays with our eyes, we can detect them using a detector to see the molecular structures and nanostructures. The physics behind X-ray techniques are surprisingly easy compared with its benefits.

Although I cannot lecture how it works in this blog post, I listed famous things that you need to master and the important papers that you want to read if you study the nanochemistry field.

10 Important Concepts to Know
Bragg equation, Scherrer equation, 2theta-theta, instrumental factors, basics of powder XRD, crystallography, right-hand rules, space group selection rules, diffraction intensity, atomic scattering factor:

Five Selected Papers
1)             Forster S. et al. J. Phys. Chem. B 2005, 109, 1347-1360
3)             Jones, M. R.; C. Mirkin., et al. Nature Materials 9, 913–917 (2010).
4)             Förster, S. et al. Nature Materials 6, 888 – 893 (2007).
5)             Cameron F. Holder and Raymond E. Schaak. ACS Nano 20191377359-7365


Good luck on your better perspective of your materials!