Lancaster EPrints

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

Acebron, Maria and Herrera, Facundo C. and Mizrahi, Martin and Navio, Cristina and Bernardo-Gavito, Ramon and Granados, Daniel and Requejo, Felix G. and Juarez, Beatriz H. (2017) Inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method. Physical Chemistry Chemical Physics, 19 (3). pp. 1999-2007. ISSN 1463-9076

[img] PDF (Acebron_Juarez_PCCP_after_referee_MAR[1]) - Submitted Version
Restricted to Repository staff only until 08 December 2017.
Available under License ["licenses_description_creative_commons_attribution_noncommercial_4_0_international_license" not defined].

Download (1780Kb)

    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.

    Item Type: Article
    Journal or Publication Title: Physical Chemistry Chemical Physics
    Additional Information: © Royal Society of Chemistry 2017
    Uncontrolled Keywords: TRIANGULAR CDS NANOCRYSTALS ; SULFIDE THIN-FILMS ; SURFACE LIGANDS ; PROSPECTS ; STATE ; PASSIVATION ; ADSORPTION ; MORPHOLOGY ; STABILITY ; MECHANISM
    Subjects:
    Departments: Faculty of Science and Technology > Physics
    ID Code: 86051
    Deposited By: ep_importer_pure
    Deposited On: 22 May 2017 16:08
    Refereed?: Yes
    Published?: Published
    Last Modified: 24 Nov 2017 01:47
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/86051

    Actions (login required)

    View Item