多嵌段共聚物/纳米粒子杂化多级结构的光学性能

结合耗散粒子动力学模拟和时域有限差分方法,研究了A(BC)_n多嵌段共聚物和纳米粒子共混体系的自组装行为及其光学性能,分析了纳米粒子体积分数和嵌段间相互作用强度对自组装形貌及其光学性能的影响。结果表明,A(BC)_n多嵌段共聚物/纳米粒子共混体系可形成有机/无机杂化的多级结构,改变纳米粒子的体积分数和嵌段间相互作用强度可以调控纳米粒子的分布及其相应的多级结构。不同尺度的结构对不同频率光的反射作用有明显区别,而纳米粒子的加入显著增大了反射峰的强度和宽度。改变纳米粒子的分布可调控反射峰的强度和宽度。

Optical Properties of Hierarchical Nanostructures Self-Assembled from Multi-Block Copolymer/Nanoparticle Blends

The self-assembly behavior and optical properties of the hybrid systems involving A(BC)n multi-block copolymers and nanoparticles were studied by combining dissipative particle dynamics and finite difference time-domain method . The effects of the volume fraction of nanoparticles and the interaction parameters between the different segments on the morphology and optical properties were investigated . Results show that A (BC )n multi-block copolymer/nanoparticle blends can self-assemble into organic/inorganic hybrid hierarchical nanostructures . The distribution of nanoparticles and the corresponding hierarchical structures have been successfully tuned by varying the volume fraction of nanoparticles and the interaction parameters between the different segments . The effects of different length scales on the reflection of light with different frequencies are significantly different ,and the addition of nanoparticles significantly increases the intensity and width of the reflection peaks .The optical forbidden band gaps can be adjusted by controlling the nanoparticle distribution in the hierarchical nanostructures .