Investigation of formation mechanism of two-dimensional spatial structures of nanoparticles in polymer thin films

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630385
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Properties in chemical engineering process/Transfer operation/Unit operation
• Research Institution: Tohoku University
• Principal Investigator: Tsukada Takao 東北大学, 工学(系)研究科(研究院), 教授 (10171969)
• Co-Investigator(Kenkyū-buntansha): ADSCHIRI TADAFUMI 東北大学, 原子分子材料科学高等研究機構, 教授 (60182995)
• Co-Investigator(Renkei-kenkyūsha): KUBO MASAKI 東北大学, 大学院工学研究科, 准教授 (50323069) ; SUGIOKA KENICHI 富山県立大学, 工学部, 講師 (80438233)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 高分子薄膜 / ナノ粒子 / ２次元配列 / アニーリング

Outline of Final Research Achievements

The spatial structures of organic molecule-modified CeO2 nanoparticles in polystyrene (PS) nanocomposite thin films spin-coated on silicon substrates were observed by TEM and SPM, before and after the films underwent thermal annealing above the glass transition temperature of PS. TEM images indicated that the nanoparticles segregated to the surface of PS nanocomposite thin film after spin-coating process. Then, the nanoparticles migrated away from the film surface to the substrate/film interface during thermal annealing, maintaining the two-dimensional spatial structures. Here, we clarified the effect of interaction between nanoparticles, i.e., surface modifiers on the nanoparticles, and solvent or PS on the spatial structures of nanoparticles before and after thermal annealing. In addition, the mechanism of nanoparticle migration across the PS thin film was investigated.

Free Research Field

化学工学