Controlled incorporation behavior of gold nanoparticles into ABC triblock terpolymer with double-helical morphology
Controlled incorporation behavior of gold nanoparticles into ABC triblock terpolymer with double-helical morphology
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金纳米粒子在双螺旋形貌的 ABC 三嵌段三元共聚物中的受控掺入行为
DOI：
10.1038/pj.2016.19
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发表时间：
2016
期刊：
影响因子：
2.8
通讯作者：
Hiroshi Jinnai
中科院分区：
文献类型：
--
作者：
Takeshi Higuchi;Hidekazu Sugimori;Hiroshi Yabu;Hiroshi Jinnai
利用透射电镜和三维结构分析研究了聚苯乙烯（PS）接枝Au纳米粒子在由PS、聚异戊二烯（PI）和聚甲基丙烯酸甲酯（PMMA）组成的ABC三嵌段双螺旋结构中的嵌入行为。通过改变接枝在Au纳米颗粒上的PS分子的分子量来控制微区中的组装。对于PS接枝的Au纳米颗粒，其尺寸大于聚（苯乙烯-b-异戊二烯-b-甲基丙烯酸甲酯）（SIM）膜中PS微区尺寸的0.3倍，纳米颗粒位于PS微区的中心以使SIM的PS片段的熵损失最小化。相比之下，< 0.2倍畴尺寸的Au纳米颗粒优先吸附到PS和PI微畴的界面，以降低纳米颗粒和SIM之间的界面张力。中等大小的Au纳米粒子均匀分布在PS微区中。PS接枝的Au纳米粒子的分布被解释为在微区的熵增益和双折射增益。
Control of the incorporation behavior of Au nanoparticles grafted with polystyrene (PS) in an ABC triblock terpolymer composed of PS, polyisoprene (PI) and poly (methyl methacrylate)(PMMA) with double-helical morphology was investigated by transmission electron microtomography and three-dimensional structural analysis. The assemblies in the microdomains were controlled by varying the molecular weight of the PS molecules grafted on the Au nanoparticles. For PS-grafted Au nanoparticles> 0.3 times the domain dimension of the PS microdomain in the poly (styrene-b-isoprene-b-methyl methacrylate)(SIM) film, the nanoparticles were located at the center of the PS microdomains to minimize the entropy loss of the PS segment of SIM. In contrast, Au nanoparticles< 0.2 times the domain dimension adsorbed preferentially to the interface of the PS and PI microdomains to reduce the interfacial tension between the nanoparticles and SIM. Intermediate-sized Au nanoparticles were uniformly distributed in the PS microdomains. The distribution of PS-grafted Au nanoparticles was explained by the entropic and enthalpic gains in the microdomains.