J. Phys. IV France 7 (1997) C2-709-C2-710
NEXAFS Studies on the Surface Structure of Liquid n-C50H102 (Pentacontane)Y. Yamamoto1, R. Mitsumoto1, T. Araki1, Y. Ouchi1, H. Ishii1, K. Seki1, N. Ueno2 and Y. Takanishi3
1 Department of Chemistry, Nagoya University, Chikusa-ku, Nagoya 464-01, Japan
2 Department of Materials Science, Chiba University, Inage-ku, Chiba 263, Japan
3 Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Tokyo 152, Japan
The surface freezing effect of n-alkane has been studied by Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy. Samples used in the experiment were n-C50H102 (pentacontane) 2500Å thick films evaporated on Cu substrate. An ordered structure has been observed at a 1.3°C higher temperature than the bulk melting point. Angle resolved measurement has revealed that the molecular long axis of pentacontane in the surface freezing layer is almost perpendicular to the surface.
© EDP Sciences 1997