Annealing-Promoted Unidirectional Migration of Organic-Modified Nanoparticles Embedded Two-Dimensionally in Polymer Thin Films
Annealing-Promoted Unidirectional Migration of Organic-Modified Nanoparticles Embedded Two-Dimensionally in Polymer Thin Films
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退火促进二维嵌入聚合物薄膜中的有机改性纳米颗粒的单向迁移
DOI：
10.1002/app.42760
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发表时间：
2015
影响因子：
3
通讯作者：
Seiichi Takami and Tadafumi Adschiri
中科院分区：
文献类型：
--
作者：
Yang Liu;Takumi Kato;Masaki Kubo;Ken-ichi Sugioka;Takao Tsukada;Seiichi Takami and Tadafumi Adschiri
利用透射电子显微镜观察了油酸修饰的纳米ceo_2纳米粒子在聚苯乙烯（PS）薄膜上自旋涂覆的空间结构，当薄膜在PS的玻璃化转变温度以上进行热退火时，纳米粒子已经分离到薄膜表面，并在PS薄膜中形成二维空间结构。然后，在热退火过程中，纳米颗粒从薄膜表面迁移到衬底/薄膜界面，保持了二维空间结构。此外，我们证明了纳米颗粒在PS膜上的单向迁移与衬底表面的特性、纳米颗粒的浓度和膜的厚度无关。©2015 Wiley期刊公司j:。变异较大。Sci.2015、132、42760。
The spatial structures of oleic acid‐modified CeO2nanoparticles in polystyrene (PS) thin films spin‐coated on silicon substrates were observed by transmission electron microscopy, when the films underwent thermal annealing above the glass‐transition temperature of PS. Before annealing, the nanoparticles have segregated to the surface of the films, and formed two‐dimensional spatial structures in the PS films. Then, the nanoparticles migrated away from the film surface to the substrate/film interface during thermal annealing, maintaining the two‐dimensional spatial structures. In addition, we demonstrated that such unidirectional migration of nanoparticles across the PS film occurs regardless of the characteristics of the substrate surface, the concentration of nanoparticles, and the thickness of the films. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2015,132, 42760.