Photo-responsive traveling of small-particles modified with azobenzene groups as molecular motors in a liquid crystal
Photo-responsive traveling of small-particles modified with azobenzene groups as molecular motors in a liquid crystal
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DOI：
10.1016/j.matlet.2016.06.010
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发表时间：
2016-10
影响因子：
3
通讯作者：
Yutaka Kuwahara;T. Oda;Sunnam Kim;T. Ogata;S. Kurihara
中科院分区：
文献类型：
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作者：
Yutaka Kuwahara;T. Oda;Sunnam Kim;T. Ogata;S. Kurihara
通过外部刺激对小物体的远程控制已经成为一种关键技术，其应用于诸如生物技术和工业制造技术的研究领域。在一个可调的液晶，5CB，我们已经实现了远程控制的偶氮苯修饰的微粒（偶氮/MP）的光刺激。光驱动的偶氮/MPs是通过修饰光敏偶氮基团作为分子马达而制备的。通过在33 °C下扫描照射区域中的样品台，可以将一对偶氮/MP传输几毫米160秒。从紫外-可见消光光谱和从辐照下的相位评价的结果，运动行为表明，与生成的微观尺寸的无序区域，如各向同性相上的5CB的α相。无序区是由偶氮基团在光照射下发生的连续反-顺-反异构反应产生的。
Remote control of small objects by external stimuli has become a critical technology with applications in research fields such as biotechnology and industrial fabrication technology. In a nematic liquid crystal, 5CB, we have achieved remote control of the azobenzene-modified microparticles (Azo/MPs) by light stimuli. The light-driven Azo/MPs were prepared by modification of photo-responsive Azo groups as molecular motors. A couple of Azo/MPs could be transported a few millimeters for 160 s by scanning the sample stage in the irradiation region at 33 °C. As results from UV–visible extinction spectroscopy and from phase evaluation under irradiation, the motion behavior suggests to be correlated with generation of micro-sized disorganization regions like isotropic phase on the nematic phase of the 5CB. The disorganization region could be generated by photo-induced continuoustrans-cis-transisomerization of Azo groups under light irradiation.