XRD Case Study: CdS Nano-rods

Inte

nsity

100806040202-theta (degrees)

CdS "Greenockite"

Inte

nsity

323028262422202-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.