Issue 3, 2017

Inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method

Abstract

The dielectric nature of organic ligands capping semiconductor colloidal nanocrystals (NCs) makes them incompatible with optoelectronic applications. For this reason, these ligands are regularly substituted through ligand-exchange processes by shorter (even atomic) or inorganic ones. In this work, an alternative path is proposed to obtain inorganically coated NCs. Differently to regular ligand exchange processes, the method reported here produces core–shell NCs and the removal of the original organic shell in a single step. This procedure leads to the formation of connected NCs resembling 1D worm-like networks with improved optical properties and polar solubility, in comparison with the initial CdSe NCs. The nature of the inorganic shell has been elucidated by X-ray Absorption Near Edge Structure (XANES), Extended X-ray Absorption Fine Structure (EXAFS) and X-ray Photoelectron Spectroscopy (XPS). The 1D morphology along with the lack of long insulating organic ligands and the higher solubility in polar media turns these structures very attractive for their further integration into optoelectronic devices.

Graphical abstract: Inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method

Supplementary files

Article information

Article type
Paper
Submitted
12 Oct 2016
Accepted
05 Dec 2016
First published
08 Dec 2016

Phys. Chem. Chem. Phys., 2017,19, 1999-2007

Inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method

M. Acebrón, F. C. Herrera, M. Mizrahi, C. Navío, R. Bernardo-Gavito, D. Granados, F. G. Requejo and B. H. Juarez, Phys. Chem. Chem. Phys., 2017, 19, 1999 DOI: 10.1039/C6CP06982G

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