PALS Tutorial

RTE calibration modelIt is important to extract pore size information from PALS spectra. However, there is no welldefined quantum mechanical model that works for both subnanometer voids and big mesopores. We have developed rectangular extension of the existing TaoEldrup model, to fully extend the quantum mechanical model to the classical, largepore limit. Our rectangular TaoEldrup model (RTE) model
At a given temperature, a lifetime vs. pore dimension curve can then be calculated. Details of this calculation can be found in our paper on Journal of Physical Chemistry B [Dull, 2001].
Figure 1. Poresize calibration calculated at different temperatures using a cubical pore shape model. The 0K (ground state) curve given by the TaoEldrup model and the dashed curve given by the classical model are presented for comparison.
Figure 2 . A comparison of the RTE model with experimental data acquired in bulk materials.
Figure 3. Ps lifetimes measured in a lowk porous silica film (Nanoglass^{TM} A10B) as a function of film temperature and calculation according to the 3dimentional rectangular TaoEldrup model.
