Layer-by-layer self-assembly of pillared two-dimensional multilayers.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 31186411.
- Also identified by DOI 10.1038/s41467-019-10631-0 and PMC identifier 6560128.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
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 Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene to LbL self-assemble (MXene/TAEA)<sub>n</sub> multilayers, where n denotes the number of bilayers. Assembly with TAEA results in highly ordered (MXene/TAEA)<sub>n</sub> 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 × 10<sup>4</sup> S m<sup>-1</sup> compared with all reported MXene multilayers fabricated by LbL technique. The (MXene/TAEA)<sub>n</sub> multilayers could be used as electrodes for flexible all-solid-state supercapacitors delivering a high volumetric capacitance of 583 F cm<sup>-3</sup> and high energy and power densities of 3.0 Wh L<sup>-1</sup> and 4400 W L<sup>-1</sup>, respectively. This strategy enables large-scale fabrication of highly conductive pillared MXene multilayers, and potentially fabrication of other 2D heterostructures.