Faculty of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland.
ACS Nano. 2023 Mar 28;17(6):5548-5560. doi: 10.1021/acsnano.2c10955. Epub 2023 Mar 10.
We describe the fabrication of dual-responsive (thermo/light) chiral plasmonic films. The idea is based on using photoswitchable achiral liquid crystal (LCs) forming chiral nanotubes for templating helical assemblies of Au NPs. Circular dichroism spectroscopy (CD) confirms chiroptical properties coming from the arrangement of organic and inorganic components, with up to 0.2 dissymmetry factor (g-factor). Upon exposure to UV light, organic molecules isomerize, resulting in controlled melting of organic nanotubes and/or inorganic nanohelices. The process can be reversed using visible light and further modified by varying the temperature, offering a control of chiroptical response of the composite material. These properties can play a key role in the future development of chiral plasmonics, metamaterials, and optoelectronic devices.
我们描述了双响应（热/光）手性等离子体膜的制备。其基本思想是利用光致变色的各向同性液晶（LCs）形成手性纳米管，用于模板化金纳米粒子的螺旋组装。圆二色性光谱（CD）证实了手性来源于有机和无机成分的排列，其不对称因子（g 因子）高达 0.2。暴露在紫外线下时，有机分子发生异构化，导致有机纳米管和/或无机纳米螺旋的可控熔化。该过程可以通过可见光照射来逆转，并且通过改变温度进一步进行修饰，从而对复合材料的手性响应进行控制。这些性质在手性等离子体学、超材料和光电设备的未来发展中可能发挥关键作用。
