Nakagawa Koh M, Noguchi Hiroshi
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
Soft Matter. 2015 Feb 4;11(7):1403-11. doi: 10.1039/c4sm02571g.
Shape transformations of amphiphilic molecular assemblies induced by chemical reactions are studied using coarse-grained molecular simulations. A binding reaction between hydrophilic and hydrophobic molecules is considered. It is found that the reaction induces transformation of an oil droplet to a tubular vesicle via bicelles and vesicles with discoidal arms. The discoidal arms close into vesicles, which are subsequently fused into the tubular vesicle. Under the chemical reaction, the bicelle-to-vesicle transition occurs at smaller sizes than in the absence of the hydrophobic molecules. It is revealed that the enhancement of this transition is due to embedded hydrophobic particles that reduce the membrane bending rigidity.
利用粗粒度分子模拟研究了化学反应诱导的两亲分子聚集体的形状转变。考虑了亲水和疏水分子之间的结合反应。发现该反应通过具有盘状臂的双分子层和囊泡诱导油滴转变为管状囊泡。盘状臂闭合形成囊泡，随后这些囊泡融合成管状囊泡。在化学反应下，双分子层到囊泡的转变发生的尺寸比没有疏水分子时更小。结果表明，这种转变的增强是由于嵌入的疏水颗粒降低了膜的弯曲刚度。
