2026-08-05 東京理科大学,大阪大学,理化学研究所,科学技術振興機構
図1：超短パルスによるカーボンナノチューブ配向制御のメカニズムと特性評価。
＜関連情報＞
- https://www.tus.ac.jp/today/archive/20260805_7019.html
- https://www.nature.com/articles/s41467-026-76305-w
フェムト秒パルス光後処理によるカーボンナノチューブフィルムの局所的な偏光誘導配向制御 Localized polarization-guided alignment control in carbon nanotube films via femtosecond-pulse optical post-processing
Daichi Suzuki,Yung-Chang Lin,Yuma Takida,Hideaki Nakajima,Kaori Fujii,Takaaki Abe,Naoko Kurihira,Teppei Araki,Masanori Koshino,Toshiya Okazaki,Hiroaki Minamide,Nao Terasaki & Taishi Nishihara
Nature Communications Published:01 August 2026
DOI:https://doi.org/10.1038/s41467-026-76305-w Unedited version
Abstract
The physical properties of single-walled carbon nanotubes (CNTs) are highly sensitive to their alignment; therefore, making precise alignment control a central requirement for high-performance device architectures. However, conventional alignment techniques offer limited spatial programmability and remain inadequate for integrating heterogeneous CNT structures within a single film. Here, we report an optical post-processing technique to locally control the alignment of CNTs. We demonstrate that femtosecond-pulsed laser processing enables polarisation-guided alignment control of CNTs after film formation (post-processing). This process produces sub-micrometre scale locally aligned CNTs with thickness exceeding 200 nm and a nematic order parameter of 0.93 (strong directional order), demonstrating a high degree of orientational order and addressing a key bottleneck in spatially heterogeneous CNT integration. Additionally, these laser-aligned CNTs exhibit a direction-dependent optical and electrical response, functioning as a terahertz polariser with a polarisation ratio of 24.7; therefore, this technique enables the applications of CNT devices integrating heterogeneous structures like division-of-focal-plane polarisation cameras and on-chip polarisation routing.
