嵌段共聚物功能化纳米粒子的多级自组装行为
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- 英文论文题名：Hierarchical Assembly of Spherical Nanoparticles Functionalized by Amphiphilic Block Copolymers
- 论文作者：周雅茹 ; 张良顺 ; 林嘉平
- 英文论文作者：Yaru Zhou ; Liangshun Zhang ; Jiaping Lin ; School of Materials Science and Engineering ; East China University of Science and Technology
- 年：2016
- 作者机构：华东理工大学材料科学与工程学院;
- 论文关键词：多级组装 ; 超结构 ; 粗粒化分子动力学
- 英文论文关键词：Hierarchical assembly ; Superstructures ; Coarse-grained Molecular dynamics
- 会议召开时间：2016-08-25
- 会议录名称：中国化学会2016年软物质理论计算与模拟会议论文摘要集
- 语种：中文
- 分类号：TB383.1;O631.1
- 学会代码：ZGHY
- 会议名称：中国化学会2016年软物质理论计算与模拟会议
- 会议地点：中国天津
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：2
- 文件大小：204k
- 原文格式：D
- 会议级别：全国
摘要
具有不同价位数的纳米粒子是用于构建低维超结构的一类基本单元。不同于各向异性纳米粒子的构筑策略,本工作设计了一种新的自组装体系(即在各向同性的球形纳米粒子上功能化两亲性嵌段共聚物)和多步自组装方案(如图1所示)。在第一步自组装过程中,当疏溶剂单体聚集焓增高于亲溶剂单体构象熵减时,两亲性嵌段共聚物在纳米粒子表面能够形成不同价位和尺寸的补丁。模拟证实嵌段共聚物的链数目和组分显著地影响补丁的几何特性。在第二步自组装过程中,由于疏溶剂效应,纳米粒子与邻近粒子通过补丁进行连接形成超结构,包括低聚型、线型和支化型结构。此外,在超结构中纳米粒子的配位数与两亲性嵌段共聚物的分子参数紧密关联。
Nanoparticles with valence and specific directional interactions have long been considered as building blocks for the construction of complex or low-coordination superstructures.The spherical nanoparticles functionalized by the amphiphilic block copolymers are designed to build on the low-coordination superstructures via the stepwise assembly.In the first-step assembly,the amphiphilic block copolymer grafted on the spherical surfaces self-assemble into patches with various valences and sizes,which are strongly dependent upon the number of grafted chains and the composition of block copolymers.In the second-step assembly,the patchy nanoparticles assemble into the superstructures via binding the solvophobic patches,such as oligomeric,linear,and branched constructions.In particular,the coordination of nanoparticles in the superstructures has a tight relation with the molecular design of amphiphilic block copolymers.
Nanoparticles with valence and specific directional interactions have long been considered as building blocks for the construction of complex or low-coordination superstructures.The spherical nanoparticles functionalized by the amphiphilic block copolymers are designed to build on the low-coordination superstructures via the stepwise assembly.In the first-step assembly,the amphiphilic block copolymer grafted on the spherical surfaces self-assemble into patches with various valences and sizes,which are strongly dependent upon the number of grafted chains and the composition of block copolymers.In the second-step assembly,the patchy nanoparticles assemble into the superstructures via binding the solvophobic patches,such as oligomeric,linear,and branched constructions.In particular,the coordination of nanoparticles in the superstructures has a tight relation with the molecular design of amphiphilic block copolymers.
引文
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[4]Wang Y;Wang Y;Breed D R.Nature.2012,491(7422):51-55.