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Title
Japanese: 
English:Control of Heat Flow in a Soft Matter: Anisotropic Heat Transport in a Discotic Columnar Liquid Crystal Capable of Reversible Alignment Switching 
Author
Japanese: M. Ryu, 竹原 陵介, S. Kamegaki, 横山 寛義, 梶谷 孝, 森川 淳子, 福島 孝典.  
English: M. Ryu, R. Takehara, S. Kamegaki, H. Yokoyama, T. Kajitani, J. Morikawa, T. Fukushima.  
Language English 
Journal/Book name
Japanese: 
English:The Journal of Physical Chemistry Letters 
Volume, Number, Page Volume 16    Issue 14    Page 3460–3464
Published date Mar. 28, 2025 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://pubs.acs.org/doi/10.1021/acs.jpclett.5c00354
 
DOI https://doi.org/10.1021/acs.jpclett.5c00354)
Abstract Discotic columnar liquid crystals (LCs) hold promise as thermal interface materials that allow heat to flow preferentially in the desired direction, whereas their heat transport properties remain elusive, particularly in terms of anisotropy related to their columnar alignments. Using a discotic columnar LC (TPC4F6) that allows for complete alignment control by applying mechanical shear, we investigated the alignment dependence of the thermal diffusivity using a dedicated setup for micro temperature wave analysis. We found that the thermal diffusivity in the direction perpendicular to the columns is larger, compared with the direction along the columns. Interestingly, this trend is opposite to that observed for a single crystal system composed of an identical aromatic core motif. This result demonstrates that the anisotropy of heat transport can change depending on the phases of materials even when they have similar compositions, providing insights into the design of organic materials for thermal management.

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