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XRD Case Study: CdS Nano-rods Intensity 100 80 60 40 20 2-theta (degrees) Intensity 32 30 28 26 24 22 20 2-theta (degrees) 100 002 101 FWHM=1.87 FWHM=0.41 => 24.1 nm => 5.3 nm Peak positions match hexagonal CdS phase “Greenockite” Requires only a few milligrams of sample INSET: Analysis of linewidths using the Scherrer equation gives particle dimensions consistent with TEM, and shows crystallographic axis of rod growth. Non-uniform diffraction rings imply orientation of crystals. This also manifests in relative peak intensities.
