GIWAXS

Grazing-Incidence Wide-Angle X-ray Scattering (GIWAXS) is a structural measurement technique wherein wide-angle scattering is collected; i.e. large values of the momentum transfer. Because of the inverse nature of reciprocal-space, these large values of q correspond to small distances; WAXS generically probes molecular length-scales.

There is no unambiguous delineation between WAXS and SAXS; generally speaking, WAXS corresponds to angles from approximately 1° to 45°, or q-values from 0.1 Å⁻¹ to 5 Å⁻¹ (6 nm to Angstroms).

Example GIWAXS data for a P3HT thin film.

Raw detector image.

Data converted to q-space.

Data converted to q-space, taking into account the Ewald sphere (notice the 'missing wedge' near the qz axis).

See Also

• GISAXS