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区块共聚合物的光控制微相分离在两个维度
Sohei Kadota1, Kenji Aoki, Shusaku Nagano
1Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan.
Journal of the American Chemical Society
|June 9, 2005
概括
研究人员开发了一种新型的ABAtriblock共聚合物与阿佐 (Az) 和聚乙烯氧化物 (PEO) 块. 暴露于光线可控地改变了共聚物.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 块共聚合物表现出微相分离.
- 含有亚博的聚合物对光刺激有反应.
- 控制纳米结构对于先进材料至关重要.
研究的目的:
- 合成一种新型的ABAtriblock共聚合物,其中包括阿佐 (Az) 和聚乙烯氧化物 (PEO).
- 研究共聚物的可光控制的自我组装和纳米结构的形成.
- 探索阿佐烯异构化与宏观结构变化之间的关系.
主要方法:
- 原子转移激素聚合用于共聚合物合成.
- 兰木尔-布洛杰特技术用于单层形成.
- 用光谱分析来监测阿佐烯异构化.
主要成果:
- 成功合成了一个ABAtriblock共聚合物与Az和PEO块.
- 观察到由光诱导的亚博单元的转化至cis同质化.
- 在光异构化过程中证明了Az域在二维中的异构延长.
- 在Langmuir-Blodgett单层中实现了光控制的纳米结构形成.
结论:
- 这种新型的ABAtriblock共聚物表现出对光响应的自我组装.
- 在纳米结构中成功实现了光控制的异型结构变化.
- 提出了一种阿佐烯包装和PEO构成的模型.
相关概念视频
Confocal Fluorescence Microscopy
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
Super-resolution Fluorescence Microscopy
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.

