Investigation in temperature-dependent microstructure of amorphous solid water

One advantage of small-angle scattering techniques is the specific surface area can be measured in situ on reacting specimens. Here via detailed analysis we can demonstrate how to correctly obtain temperature-dependent specific surface area values which are relevant to phase transformation considering the generalized Guinier-Porod model and small-angle neutron scattering (SANS) measurements for D2O amorphous solid water obtained by Mitterdorfer et al. To be specific we found some mismatches in their Fig. 3, say, the numerical values of the temperature-dependent specific surface area as well as the trend of the radius of gyration (R-G) and s parameter. As there are no plateaus in Q(4) I-versus-Q plot as Q ->infinity shown in some curves of Fig. 2 in Mitterdorfer et al.'s [Phys.Chem.Chem.Phys. 16, 16013 (2014)] paper the temperature-dependent specific surface area as well as the radius of gyration (R-G) calculated and illustrated in Figs. 3 and 5 for D2O amorphous solid water need further experiments.