Highly Flexible Ti3C2TxMXene/Waterborne Polyurethane Membranes for High-Efficiency Terahertz Modulation with Low Insertion Loss

Feng, T and Hu, Y and Chang, X and Huang, W and Wang, D and Zhu, H and An, T and Li, W and Meng, K and Lu, X and Roul, B and Das, S and Deng, H and Zaytsev, KI and Zhu, L-G and Shi, Q (2022) Highly Flexible Ti3C2TxMXene/Waterborne Polyurethane Membranes for High-Efficiency Terahertz Modulation with Low Insertion Loss. In: ACS Applied Materials and Interfaces, 15 (5). 7592- 7601.

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Abstract

The dynamic control of terahertz (THz) wave transmission on flexible functional materials is a fundamental building block for wearable electronics and sensors in the THz range. However, achieving high-efficiency THz modulation and low insertion loss is a great challenge while maintaining the excellent flexibility and stretchability of the materials. Herein, we report a Ti3C2Tx MXene/waterborne polyurethane (WPU) membrane prepared by a vacuum-assisted filtration method, which exhibits excellent THz modulation properties across stretching. The hydrophilic Ti3C2Tx MXene and WPU enable the uniform 3D distribution of Ti3C2Tx MXene in the WPU matrix. Particularly, the stretchability with the maximum strain of the membranes can reach 200, accompanied by dynamic tuning of THz transmittance for more than 90 and an insertion loss as low as -4.87 dB. The giant THz modulation continuously decreases with MXene content per unit area, accompanied by a lower density of the MXene interface and diminished THz absorption during stretching. Such a design opens a pathway for achieving flexible THz modulators with a high modulation depth and low insertion loss, which would be used for THz flexible and wearable devices. © 2023 American Chemical Society.

Item Type:	Journal Article
Publication:	ACS Applied Materials and Interfaces
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to American Chemical Society.
Keywords:	Flexible electronics; Functional materials; Microfiltration; Polyurethanes; Terahertz waves; Transmissions; Wave transmission; Wearable technology, Dynamic controls; Flexible; Fundamental building blocks; Higher efficiency; Low insertion loss; Mxene; Polyurethane membranes; Tera Hertz; Terahertz range; Waterborne Polyurethane, Efficiency
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	16 Feb 2023 05:35
Last Modified:	16 Feb 2023 05:35
URI:	https://eprints.iisc.ac.in/id/eprint/80328

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