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Issue 24, 2018
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Dynamic tungsten diselenide nanomaterials: supramolecular assembly-induced structural transition over exfoliated two-dimensional nanosheets

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Abstract

A simple and effective method for direct exfoliation of tungsten diselenide (WSe2) into few-layered nanosheets has been successfully developed by employing a low molecular weight adenine-functionalized supramolecular polymer (A-PPG). In this study, we discover A-PPG can self-assemble into a long-range, ordered lamellar microstructure on the surface of WSe2 due to the efficient non-covalent interactions between A-PPG and WSe2. Morphological and light scattering studies confirmed the dynamic self-assembly behavior of A-PPG has the capacity to efficiently manipulate the transition between contractile and extended lamellar microstructures on the surface of metallic 1T-phase and semiconducting 2H-phase WSe2 nanosheets, respectively. The extent of WSe2 exfoliation can be easily controlled by systematically adjusting the amount of A-PPG in the composites, to obtain nanocomposites with the desired functional characteristics. In addition, the resulting composites possess unique liquid–solid phase transition behavior and excellent thermoreversible properties, revealing the self-assembled lamellar structure of A-PPG functions as a critical factor to manipulate and tailor the physical properties of exfoliated WSe2. This newly developed method of producing exfoliated WSe2 provides a useful conceptual and potential framework for developing WSe2-based multifunctional nanocomposites to extend their application in solution-processed semiconductor devices.

Graphical abstract: Dynamic tungsten diselenide nanomaterials: supramolecular assembly-induced structural transition over exfoliated two-dimensional nanosheets

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Supplementary files

Article information


Submitted
19 Apr 2018
Accepted
30 May 2018
First published
31 May 2018

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2018,9, 5452-5460
Article type
Edge Article

Dynamic tungsten diselenide nanomaterials: supramolecular assembly-induced structural transition over exfoliated two-dimensional nanosheets

A. A. Muhabie, C. Ho, B. T. Gebeyehu, S. Huang, C. Chiu, J. Lai, D. Lee and C. Cheng, Chem. Sci., 2018, 9, 5452
DOI: 10.1039/C8SC01778F

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