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科学领域:

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

背景情况:

  • 响应光的材料提供了对材料属性的动态控制.
  • 块共聚合物 (BCP) 颗粒是先进材料的多功能构建块.
  • 开发稳定的多状态内存系统对于数据存储至关重要.

研究的目的:

  • 为多层结构记忆设计响应光的BCP粒子.
  • 为了实现可逆的,光编程的形状转换,具有长期稳定性.
  • 为了实现存储信息的实时视觉读取.

主要方法:

  • 将水光开关纳入聚乙烯-块-聚乙烯 (PS-b-P2VP) 颗粒.
  • 双波长辐射 (410nm和365nm) 诱导可逆的 (E) / (Z) 异构.
  • 使用显微镜和表征技术分析形态变化.
  • 通过弗斯特尔共振能量转移 (FRET) 集成光染料用于光学读取.

主要成果:

  • PS-b-P2VP粒子表现出三种不同的光可编程形态:状圆体,网状片和表面包裹的圆盘.
  • 形态在多个周期内可逆地切换,没有疲劳.
  • 编程状态在30多天内保持转移稳定,保持其形态的97%以上.
  • 用域选择性光染料和FRET调制实现了编码状态的颜色编码读取.

结论:

  • 开发了一个新的BCP粒子系统,作为一个稳定的,多层次的结构性记忆元件.
  • 证明了对数据编码的粒子形态的光诱导,可逆控制.
  • 启用存储信息的直接光学读取,为先进的光学数据存储解决方案铺平了道路.