Layer-by-layer self-assembly of pillared two-dimensional multilayers

Weiqian Tian, Armin VahidMohammadi, Zhen Wang, Liangqi Ouyang, Majid Beidaghi () and Mahiar M. Hamedi ()
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Weiqian Tian: Department of Fibre and Polymer Technology, KTH Royal Institute of Technology
Armin VahidMohammadi: Auburn University
Zhen Wang: Department of Fibre and Polymer Technology, KTH Royal Institute of Technology
Liangqi Ouyang: Department of Fibre and Polymer Technology, KTH Royal Institute of Technology
Majid Beidaghi: Auburn University
Mahiar M. Hamedi: Department of Fibre and Polymer Technology, KTH Royal Institute of Technology

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract We report Layer-by-Layer (LbL) self-assembly of pillared two-dimensional (2D) multilayers, from water, onto a wide range of substrates. This LbL method uses a small molecule, tris(2-aminoethyl) amine (TAEA), and a colloidal dispersion of Ti3C2Tx MXene to LbL self-assemble (MXene/TAEA)n multilayers, where n denotes the number of bilayers. Assembly with TAEA results in highly ordered (MXene/TAEA)n multilayers where the TAEA expands the interlayer spacing of MXene flakes by only ~ 1 Å and reinforces the interconnection between them. The TAEA-pillared MXene multilayers show the highest electronic conductivity of 7.3 × 104 S m−1 compared with all reported MXene multilayers fabricated by LbL technique. The (MXene/TAEA)n multilayers could be used as electrodes for flexible all-solid-state supercapacitors delivering a high volumetric capacitance of 583 F cm−3 and high energy and power densities of 3.0 Wh L−1 and 4400 W L−1, respectively. This strategy enables large-scale fabrication of highly conductive pillared MXene multilayers, and potentially fabrication of other 2D heterostructures.

Date: 2019
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DOI: 10.1038/s41467-019-10631-0

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