Engineering chirality at wafer scale with ordered carbon nanotube architectures

Jacques Doumani, Minhan Lou, Oliver Dewey, Nina Hong, Jichao Fan, Andrey Baydin, Keshav Zahn, Yohei Yomogida, Kazuhiro Yanagi, Matteo Pasquali, Riichiro Saito, Junichiro Kono and Weilu Gao ()
Additional contact information
Jacques Doumani: Rice University
Minhan Lou: The University of Utah
Oliver Dewey: Rice University
Nina Hong: J.A. Woollam Co., Inc.
Jichao Fan: The University of Utah
Andrey Baydin: Rice University
Keshav Zahn: Rice University
Yohei Yomogida: Tokyo Metropolitan University
Kazuhiro Yanagi: Tokyo Metropolitan University
Matteo Pasquali: Rice University
Riichiro Saito: Tokyo Metropolitan University
Junichiro Kono: Rice University
Weilu Gao: The University of Utah

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Creating artificial matter with controllable chirality in a simple and scalable manner brings new opportunities to diverse areas. Here we show two such methods based on controlled vacuum filtration - twist stacking and mechanical rotation - for fabricating wafer-scale chiral architectures of ordered carbon nanotubes (CNTs) with tunable and large circular dichroism (CD). By controlling the stacking angle and handedness in the twist-stacking approach, we maximize the CD response and achieve a high deep-ultraviolet ellipticity of 40 ± 1 mdeg nm−1. Our theoretical simulations using the transfer matrix method reproduce the experimentally observed CD spectra and further predict that an optimized film of twist-stacked CNTs can exhibit an ellipticity as high as 150 mdeg nm−1, corresponding to a g factor of 0.22. Furthermore, the mechanical rotation method not only accelerates the fabrication of twisted structures but also produces both chiralities simultaneously in a single sample, in a single run, and in a controllable manner. The created wafer-scale objects represent an alternative type of synthetic chiral matter consisting of ordered quantum wires whose macroscopic properties are governed by nanoscopic electronic signatures and can be used to explore chiral phenomena and develop chiral photonic and optoelectronic devices.

Date: 2023
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DOI: 10.1038/s41467-023-43199-x

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