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用于块共聚合物自组装的光学纳米成像.

Jie Yan1, Ling-Xi Zhao, Chong Li

  • 1Wuhan National Laboratory for Optoelectronics and ‡College of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan, Hubei 430074, China.

Journal of the American Chemical Society
|February 11, 2015
PubMed
概括

这项研究展示了使用可光切换螺旋 (SPs) 的块共聚合物自组装的子衍射光学纳米成像. 这些SP可使聚乙烯-聚乙烯-聚乙烯氧化物) 微相结构在聚乙烯-聚乙烯-聚乙烯-聚乙烯氧化物) 微粒中的高分辨率可视化.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术
  • 聚合物化学 聚合物化学

背景情况:

  • 光学纳米成像的目标是超越射极限以获得更高的分辨率.
  • 可光切换的光体为超高分辨率成像技术提供了潜力.
  • 块共聚合物自组装成有序的微结构,对先进材料至关重要.

研究的目的:

  • 开发一种强大的光学纳米成像方法,用于可视化块共聚合物的自组装.
  • 为了实现微相结构在区块共聚合物微粒中的亚衍射分辨率成像.
  • 使用可光切换的光体,以提高对比度和定位.

主要方法:

  • 聚乙烯块-聚乙烯氧化物 (PSt-b-PEO) 块共聚合物的组装.
  • 用螺旋 (SPs) 染色水性聚乙烯领域.
  • 使用紫外线和可见光辐射的SPs的序列分子定位和光切换.

主要成果:

  • 选择性地定位在微粒的疏水性聚烯阶段的螺旋.
  • 实现了SPs的可逆开关光切换.
  • 展示了50nm分辨率的微相结构的光学纳米成像.

结论:

  • 这种方法提供了光学纳米成像的坚固实现,具有亚衍射分辨率,用于解决方案自组装.
  • SPs的相选择分布是可视化块共聚合物微结构的关键.
  • 该技术为研究自组装聚合物系统提供了强大的工具.