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使用外部刺激控制有机纳米纤维的结构和形态
Barış Sezgin1,2, Jiao Liu2,3, Diana P N Gonçalves2,4
1Department of Chemistry, Süleyman Demirel University, 32260 Isparta, Çünür, Turkey.
ACS nanoscience Au
|August 21, 2023
概括
研究人员开发了新的曲核心分子,通过电场或紫外线改变纳米级结构. 这为有机纳米纤维和液晶相提供了先进的控制.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 纳米技术 纳米技术
背景情况:
- 控制有机纳米纤维的形态对于先进材料至关重要.
- 曲核心分子具有独特的自我组装特性.
- 外部刺激可以诱导分子系统中的相位过渡.
研究的目的:
- 设计和合成能够发生形态变化的曲核心分子.
- 为了研究这些分子对电场和紫外线的反应.
- 探索纳米结构控制的新方法.
主要方法:
- 合成具有特定功能群的新型曲核心分子 (奇拉侧链,阿佐烯).
- 使用差分扫描热度测量,光学显微镜,CD光谱极度测量,电子显微镜,紫外线对光谱光度测量和X射线衍射进行表征.
- 分析相位行为和纳米尺度形态 (螺旋式纳米纤维,纳米圆柱体).
主要成果:
- 两个不同的纳米尺度形态,螺旋式纳米纤维 (HNFs) 和分层的纳米圆柱体,在没有外部刺激的情况下共存.
- 电场的应用诱导了奇拉分子中倾斜的形相,消除了HNFs.
- 紫外线照射导致在含有亚博的分子中单独形成HNF,从而消除了纳米筒.
结论:
- 曲核心分子可以被设计为在对外部刺激的反应中经历特定的形态变化.
- 电场和紫外线光提供超越冷却速度的纳米结构的可调节控制.
- 这项研究扩大了操纵曲核分子基纳米材料的结构和形态的可能性.
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