Chao CY, Pan TC, Chou CF, Ho JT
Department of Physics, National Central University, Chung-Li, Taiwan 32054, Republic of China.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000 Aug;62(2 Pt A):R1485-8. doi: 10.1103/physreve.62.r1485.
Electron diffraction in free-standing liquid-crystal films of N-(4-n-butoxybenzylidene)-4-n-octylaniline between 3 and 12 molecular layers thick reveals the unusual occurrence of the smectic-A' phase, a highly correlated isotropic liquid, on the surface of smectic-A films. The surface smectic-A-smectic-A' transition is found to be first order. Surprisingly, the temperature range of the subsequent surface hexatic-B phase is reduced with decreasing film thickness.
在厚度为3至12个分子层的N-（4-正丁氧基亚苄基）-4-正辛基苯胺独立液晶薄膜中的电子衍射显示，在近晶-A薄膜表面出现了不寻常的近晶-A'相，这是一种高度相关的各向同性液体。发现表面近晶-A-近晶-A'转变是一级的。令人惊讶的是，随后表面六方-B相的温度范围随着薄膜厚度的减小而减小。
