碳纳米复合材料在LC中产生的相干复合光的精细拓扑结构
Fine topological structure of coherent complex light created by carbon nanocomposites in LC
摘要：
研究了多壁碳纳米管（MWCNTs）掺杂的Pb 5CB的精细复杂光结构、光学奇异性和导电性。在足够小的浓度下，多壁碳纳米管自发地聚集成具有随机分形边界的微尺度团簇系统。它们被条纹状的微尺度包层包围，这在传播的激光束中产生光学奇点。在Freedericksz上方施加横向电场引发5CB的垂面排列，并且纳米管簇之间的条纹状反转壁减小了复合材料的自由能。建立了它们的形貌和性质的理论。同时，条纹包层消失了，这可以被视为非线性光子学中的结构取向非线性的新机制。首先测量偏振奇异点（圆形C点）。团簇的渗流增强了体系的电导率，甚至在没有外加电场的情况下也能产生反型壁。碳纳米管复合材料在液晶中形成了纳米掺杂剂与微观/宏观体系之间的桥梁，具有良好的应用前景。液晶纳米复合材料的奇异光学检测和表征的详细协议是在现代纳米科学和技术的应用有前途的工具。
英文摘要：
Fine complex light structure, optical singularities and electroconductivty of nematic 5CB doped by multi-walled carbon nanotubes (MWCNTs) were investigated. MWCNTs gather spontaneously to system of micro scale clusters with random fractal borders at small enough concentration. They are surrounded by the striped micro scale cladding which creates optical singularities in propagating laser beam. Applied transverse electric field above the Freedericksz initiates homeotropic arrangement of 5CB and the striped inversion walls between nanotubes clusters what diminishes free energy of a composite. Theory of their appearance and properties was built. Simultaneously the striped cladding disappears what can be treated as new mechanism of structure orientation nonlinearity in nonlinear photonics. Polarization singularities (circular C points) were measured firstly. Percolation of clusters enhances strongly electrical conductivity of the system and creates inversion walls even without applied field. Carbon nanotubes composites in LC form bridge between nano dopants and micro/macro system and are promising for applications. Elaborated protocol of singular optics inspection and characterization of LC nanocomposites is promising tool for applications in modern nanosience and technique.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
