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Thermotropic liquid crystals with low-dimensional carbon allotropes
Nano Express Pub Date : 2021-02-05 , DOI: 10.1088/2632-959x/abdf2d
Adam P Draude , Ingo Dierking

As display devices based on liquid crystals have matured over the last decades, liquid crystal research has shifted its priorities in slightly different directions, such as sensors, photonics, nanotechnology and even more biologically related fields like drug delivery. This implied a change of emphasis in the development of novel materials, of which a completely new class of liquid crystal based composites emerged, that of nanoparticle-dispersed liquid crystals. The underlying ideas were to add functionality, while maintaining switchability, and the exploitation of liquid crystal self-organisation to build hierarchical nanostructures. Of particular interest for applications are dispersions of carbon nanomaterials, such as fullerenes, nanotubes and the graphene variants, due to their interactions with conventional liquid crystals. While such systems have been investigated for the past two decades, we concentrate in this review on the effects of dimensionality of the dispersed carbon nanoparticles, which goes hand in hand with the more recent developments in this field. Examples are the doping of 0D fullerenes in liquid crystals and implications for Blue Phase stability, or 1D nanotubes in nematic and ferroelectric liquid crystals, questions of dispersibility and applications as alignment media in ITO-free devices. Graphene (2D) and especially graphene oxide are mainly investigated for their formation of lyotropic liquid crystals. We here discuss the more recent aspects of dispersion in thermotropics.



中文翻译:

具有低维碳同素异形体的热致液晶

随着基于液晶的显示设备在过去的几十年中日趋成熟,液晶研究的重点已经朝着略有不同的方向转移,例如传感器,光子学,纳米技术,甚至是与生物相关的领域,例如药物输送。这暗示着对新材料的开发重点的改变,其中出现了一类全新的基于液晶的复合材料,即纳米颗粒分散的液晶。基本思想是在保持可切换性的同时增加功能性,以及利用液晶自组织来构建分层的纳米结构。对于应用特别感兴趣的是碳纳米材料的分散体,例如富勒烯,纳米管和石墨烯变体,因为它们与常规液晶相互作用。尽管在过去的二十年中对此类系统进行了研究,但我们将重点关注分散的碳纳米粒子的尺寸效应,这与该领域的最新发展紧密相关。例如,液晶中的0D富勒烯掺杂以及对蓝相稳定性的影响,向列和铁电液晶中的一维纳米管,分散性问题以及在无ITO器件中用作取向介质的应用。主要研究石墨烯(2D),尤其是氧化石墨烯的溶致液晶的形成。我们在这里讨论在热致分散中的最新方面。这与该领域的最新发展息息相关。例如,液晶中的0D富勒烯掺杂以及对蓝相稳定性的影响,向列和铁电液晶中的一维纳米管,分散性问题以及在无ITO器件中用作取向介质的应用。主要研究石墨烯(2D),尤其是氧化石墨烯的溶致液晶的形成。我们在这里讨论在热致分散中的最新方面。这与该领域的最新发展息息相关。例如,液晶中的0D富勒烯掺杂以及对蓝相稳定性的影响,或向列和铁电液晶中的1D纳米管,分散性问题以及在无ITO器件中用作取向介质的问题。主要研究石墨烯(2D),尤其是氧化石墨烯的溶致液晶的形成。我们在这里讨论在热致分散中的最新方面。主要研究石墨烯(2D),尤其是氧化石墨烯的溶致液晶的形成。我们在这里讨论在热致分散中的最新方面。主要研究石墨烯(2D),尤其是氧化石墨烯的溶致液晶的形成。我们在这里讨论在热致分散中的最新方面。

更新日期:2021-02-05
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