Ricerc@Sapienza

The effect of the annealing few degrees above the glass transition temperature (Tda = 62 C) on the physical aging (Tpa = 51 C) of amorphous quenched poly(L-lactide) is investigated by an implementation of variable temperature Fourier transform infrared (FTIR). By using a temperature program composed of a linear heating ramp superimposed to a temperature modulation (modulated temperature FTIR), the reversing and nonreversing intensity variation of selected bands, related to highenergy gg and low-energy gt conformers, is investigated.

Scope of the work is to get a comprehensive study on electrical and optical characteristics of SiOx:H film within the role of CO and H in the film growth and composition and on how the Oxygen additionchanges the film structure and Hydrogen inclusion in the amorphous matrix and their chemical bonding with silicon. We monitored the effective lifetime tEFF and FTIR spectraon as-deposited and thermal treated samples to understand the passivation mechanism,correlating wafer lifetime and Hydrogen inclusion in sub-oxide film.