Issue 11, 2020

Perfectly imperfect: a review of chemical tools for exciton engineering in single-walled carbon nanotubes

Abstract

Single-walled carbon nanotubes (SWCNTs) have revealed extraordinary potential for photonics. However, the scarcity of convenient methods to control chirality and inherently low quantum yield hamper their implementation in the field of optics. It has been recently discovered that the introduction of a slight amount of disorder to the otherwise perfect nanocarbon lattice can be surprisingly beneficial. Covalent addition of oxygen species or alkyl/aryl groups to the SWCNT side-wall creates local potential wells for trapping mobile excitons. As a consequence, the light emitted from SWCNTs is much brighter and approaches quantum yields of up to 20%. Furthermore, new redshifted signatures emerge in the spectra, which extends their application capabilities. This review summarizes the progress on this front from the chemical perspective. A range of currently available tools to create such defects is provided. To gain appropriate insight, a selection of inorganic and organic chemical reactions, which work on the principles of oxidation and alkylation/arylation, respectively, is analyzed herein. Furthermore, the effect of the structure of the grafted functional group on the optical properties is considered in detail. It is supported by all data extracted from the literature regarding modification of (6,5) SWCNTs, being the most representative example due to their widespread use. This summary serves as guidance for new scientists entering this promising area of research. Finally, the contribution is concluded with a critical comparison of the methodologies and an overview of the future shape of this field, which indicates which niches should be taken care of first.

Graphical abstract: Perfectly imperfect: a review of chemical tools for exciton engineering in single-walled carbon nanotubes

Article information

Article type
Review Article
Submitted
22 מאי 2020
Accepted
04 אוג 2020
First published
04 אוג 2020

Mater. Horiz., 2020,7, 2860-2881

Perfectly imperfect: a review of chemical tools for exciton engineering in single-walled carbon nanotubes

D. Janas, Mater. Horiz., 2020, 7, 2860 DOI: 10.1039/D0MH00845A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements