n-Nonadecane Embedded in Mesopores
The ordering of n-nonadecane confined in the pores of MCM-41 silica was investigated by Positron Annihilation Lifetime Spectroscopy. No irradiation effects caused by the positron source were observed. The ortho-positronium components found in the lifetime spectra correspond to the free volumes observed in the bulk alkane plus additional space at the interface between n-nonadecane and the silica wall. Phase transitions rigid-rotator and rotator-liquid were shifted towards lower temperatures by 28 and 16 degrees respectively.
S. J. Wang, Z. Q. Chen, B. Wang and Y. C. Jean
R. Zaleski and J. Goworek, "n-Nonadecane Embedded in Mesopores", Materials Science Forum, Vol. 607, pp. 180-182, 2009