Have imageJ calculate the your sample's d-spacing for you.
== How it works ==
Use imageJ’s circle tool (shift + oval tool) to measure the spot/ring patterns concentric to the (000) direct beam. From the area measurement, the radius (G) is found. From G = 1/d in reciprocal space, the d-spacing is calculated for each measurement made. The calculated values for G and d are added to the imageJ Results window in new columns
. You might have to try it once before it works right, so it sets the measurements in imageJ to measure the area and centroid of the circle.
== Image Requirements ==
You need to have a properly calibrated diffraction pattern for the calculations to work
right. Most TEM operators use Gatan’s Digital Micrograph software for image collection. If you are using DM then it is likely that this plugin will work right away on your images, or will work with some minor effort on the part of your TEM technician.
The preferred image is a .dm3 file (Gatan’s format) that is properly calibrated in reciprocal space (see Gatan’s documentation). The easiest way to check this is that the scale bar in your images is displayed in DM with 1/nm units.
== Tips ==