Chen Xiaodong, Lu Nan, Zhang Hui, Hirtz Michael, Wu Lixin, Fuchs Harald, Chi Lifeng
Physikalisches Institut and Center for Nanotechnology (CeNTech), Westfälische Wilhelms-Universität, D-48149 Münster, Germany.
J Phys Chem B. 2006 Apr 20;110(15):8039-46. doi: 10.1021/jp0602530.
We systematically describe the striped pattern formation of the mixed monolayers of 1,2-di(2,4-octadecadienoyl)-sn-glycero-3-phosphocholine (DOEPC) and l-alpha-dipalmitoylphosphatidylcholine (DPPC) from the liquid expanded (LE) phase onto a mica surface by Langmuir-Blodgett (LB) transfer. The addition of the second component, DOEPC, strongly affects the formation of DPPC stripe patterns. When the molar ratio of DPPC and DOEPC is 1:0.1, the horizontal stripes dominate, while in the case of pure DPPC monolayer, there are three kinds of patterns: horizontal stripes, grids, and vertical stripes. The width and periodicity of stripes formed from the mixed monolayers are ca. 4-5 times smaller than those formed from pure DPPC patterns at the same transfer conditions, while the widths of channels are similar. A phase shift of substrate-mediated microphase separation in the two-component system during LB transfer is considered to be the mechanism for the influence of the second component on the formation of DPPC stripe patterns.
我们系统地描述了通过朗缪尔-布洛杰特（LB）转移法，将1,2-二（2,4-十八碳二烯酰基）-sn-甘油-3-磷酸胆碱（DOEPC）和l-α-二棕榈酰磷脂酰胆碱（DPPC）的混合单层从液体扩张（LE）相转移到云母表面时条纹图案的形成。第二种成分DOEPC的加入强烈影响DPPC条纹图案的形成。当DPPC与DOEPC的摩尔比为1:0.1时，水平条纹占主导，而在纯DPPC单层的情况下，有三种图案：水平条纹、网格和垂直条纹。在相同转移条件下，由混合单层形成的条纹的宽度和周期性比由纯DPPC图案形成的条纹小约4-5倍，而通道宽度相似。LB转移过程中二元体系中底物介导的微相分离的相移被认为是第二种成分影响DPPC条纹图案形成的机制。
