GTSAXS

GTSAXS, or Grazing-incidence Transmission Small-Angle X-ray Scattering is a variant of GISAXS; i.e. it is a surface-sensitive x-ray scattering technique. In GTSAXS, the x-ray beam is directed towards the edge of a sample (rather than the center). This small geometric difference allows the sub-horizon scattering (which is normally attenuated due to substrate absorption) to escape from the sample edge, and be recorded. This sub-horizon scattering is 'cleaner' than conventional GISAXS data. In particular, it suffers much less from the refraction-induced distortion of reciprocal-space and the multiple scattering effects that plague conventional GISAXS.

References

• Lu, X.; Yager, K.G.; Johnston, D.; Black, C.T.; Ocko, B.M. Grazing-incidence transmission X-ray scattering: surface scattering in the Born approximation Journal of Applied Crystallography 2013, 46, 165–172. doi: 10.1107/S0021889812047887
• Mahadevapuram, N.; Strzalka, J.; Stein, G.E. Grazing-incidence transmission small angle X-ray scattering from thin films of block copolymers J. Polymer Sci. Part B Polymer Phys. 2013 51, 602610. doi: 10.1002/polb.23261
• Weidman, M.C.; Yager, K.G., Tisdale, W.A. Interparticle Spacing and Structural Ordering in Superlattice PbS Nanocrystal Solids Undergoing Ligand Exchange Chemistry of Materials 2015 doi: 10.1021/cm503626s