Biomimetic membrane control of block copolymer vesicles with tunable wall thickness
Biomimetic membrane control of block copolymer vesicles with tunable wall thickness
复制标题
壁厚可调的嵌段共聚物囊泡的仿生膜控制
DOI:
10.1039/c2sm26882e
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发表时间:
2013-01
期刊:
影响因子:
3.4
通讯作者:
Xie DQ
中科院分区:
文献类型:
--
作者:
Xiao MY;Liu JN;Yang JX;Wang R;Xie DQ
Our recent simulation study on mechanisms of vesicle formation in ABA triblock copolymer system has revealed the factors or conditions that lead to the transition from mechanism I (a bilayer membrane closing pathway) to mechanism II (a nucleation and growth pathway). The spontaneous vesicle formation involves many metastable states and the two mechanisms do not each lead to a unique intermediate structure, but have a transition period. In this paper, we use dissipative particle dynamics (DPD) simulations to further investigate the effect of vesicle size and hydrophobicity of the blocks on membrane characteristics, with the aim of understanding and controlling the structures of block copolymer vesicle and its formation in different scales, and to try to connect our simulation results to previous experimental studies. We have evaluated the thickness of the hydrophobic layer and observed two types of dependence on the vesicle size. Our results indicate that as the degree of hydrophobicity of the blocks increases, from a totally strong-behavior to a totally weak-behavior relationship, the transformation is observed in large sized vesicles first and then in small sized vesicles. Two characteristics, the chain compaction of the vesicles and the area densities of the inner corona, are thought to be important in controlling the membrane thickness, which are proposed to explain the size-dependent behaviors of bilayer thickness. Finally, the fraction of bridges Φb is also calculated. In our model, Φb increases with an increase in vesicle size for a given system and fixed interaction and decreases with an increase in the degree of hydrophobicity of the blocks.
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DOI:
10.1002/asia.201200155
发表时间:
2012-08
期刊:
Chemistry, an Asian journal
影响因子:
--
作者:
Hanqing Qian;Wei Yao;Shuling Yu;Ying Chen;Wei Wu;Xiqun Jiang
通讯作者:
Hanqing Qian;Wei Yao;Shuling Yu;Ying Chen;Wei Wu;Xiqun Jiang
影响因子:
8.6
作者:
Kröger, M;Hess, S
通讯作者:
Hess, S
影响因子:
5.5
作者:
Sevink, GJA;Zvelindovsky, AV
通讯作者:
Zvelindovsky, AV
DOI:
10.1021/la903292f
发表时间:
2010-03
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
作者:
Weixin Kong;Baohui Li;Q. Jin;D. Ding;A. Shi
通讯作者:
Weixin Kong;Baohui Li;Q. Jin;D. Ding;A. Shi
DOI:
10.1063/1.2463426
发表时间:
2007-01
期刊:
The Journal of chemical physics
影响因子:
--
作者:
Takashi Uneyama
通讯作者:
Takashi Uneyama