ETHANOL ON GRAPHITE - THE INFLUENCE OF HYDROGEN-BONDING ON SURFACE MELTING

被引:28
作者
HERWIG, KW [1 ]
TROUW, FR [1 ]
机构
[1] ARGONNE NATL LAB,INTENSE PULSED NEUTRON SOURCE,ARGONNE,IL 60439
关键词
D O I
10.1103/PhysRevLett.69.89
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Neutron diffraction demonstrates that ethanol physisorbed on the basal planes of graphite forms a commensurate unit cell with a melting temperature of approximately 205 K for coverages from 0.7 to 1.6 monolayers. This temperature is 46 K above the melting temperature of bulk ethanol, making this system unique among species physisorbed on graphite. A microscopic model of the system has been developed using a molecular dynamics simulation. It predicts a two-step mechanism for melting and demonstrates that hydrogen bonding plays a dominant role in stabilizing the two-dimensional solid.
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页码:89 / 92
页数:4
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