文献类型：期刊文献

英文题名：Diverse chiral assemblies of nanoparticles directed by achiral block copolymers via nanochannel confinement

作者：Zhang, Qian[1];Gu, Jiabin[1];Zhang, Liangshun[1];Lin, Jiaping[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn,Minist Educ,Key Lab Ultrafine, Shanghai 200237, Peoples R China

年份：2019

卷号：11

期号：2

起止页码：474

外文期刊名：NANOSCALE

收录：;EI(收录号：20190206355867);WOS:【SCI-EXPANDED(收录号:WOS:000455001600012)】；

基金：This work was supported by the National Natural Science Foundation of China (21574040, 21873029 and 51833003).

语种：英文

外文关键词：Scaffolds - Block copolymers - Structural dynamics - Infrared devices - Nanocomposites

摘要：It is a challenging task to realize large-area manufacture of chiral geometries of nanoparticles in solid-state materials, which exhibit strongly chiroptical responses in the visible and near-infrared ranges. Herein, novel nanocomposites, made from mixtures of achiral block copolymers and nanoparticles in a geometrically confined environment, are conceptually proposed to construct the chiral assemblies of nanoparticles through a joint theoretical-calculation framework and experimental discussion. It is found that the nanochannel-confined block copolymers self-assemble into a family of intrinsically chiral architectures, which serve as structural scaffolds to direct the chiral arrangement of nanoparticles. Through calculations of chiral order parameters and simulations of discrete dipole approximation, it is further demonstrated that certain members of this family of nanoparticle assemblies exhibit intense chiroptical activity, which can be tailored by the nanochannel radius and the nanoparticle loading. These findings highlight the multiple levels of structural control over a class of chiral assemblies of nanoparticles and the functionalities of emerging materials via careful design and selection of nanocomposites.