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

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, a...

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Autores principales: Acebrón, María, Herrera, Facundo Carlos, Mizrahi, Martín D., Navío, Cristina, Gavito, Ramón Bernardo, Granados, Daniel, Requejo, Félix Gregorio, Juarez, Beatriz H.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Exactas
Física
Química
colloidal nanocrystals
core–shell NCs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/106626
https://pubs.rsc.org/en/content/articlelanding/2017/CP/C6CP06982G
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-106626
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Química
colloidal nanocrystals
core–shell NCs
spellingShingle Ciencias Exactas
Física
Química
colloidal nanocrystals
core–shell NCs
Acebrón, María
Herrera, Facundo Carlos
Mizrahi, Martín D.
Navío, Cristina
Gavito, Ramón Bernardo
Granados, Daniel
Requejo, Félix Gregorio
Juarez, Beatriz H.
Inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method
topic_facet Ciencias Exactas
Física
Química
colloidal nanocrystals
core–shell NCs
description 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.
format Articulo
Articulo
author Acebrón, María
Herrera, Facundo Carlos
Mizrahi, Martín D.
Navío, Cristina
Gavito, Ramón Bernardo
Granados, Daniel
Requejo, Félix Gregorio
Juarez, Beatriz H.
author_facet Acebrón, María
Herrera, Facundo Carlos
Mizrahi, Martín D.
Navío, Cristina
Gavito, Ramón Bernardo
Granados, Daniel
Requejo, Félix Gregorio
Juarez, Beatriz H.
author_sort Acebrón, María
title Inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method
title_short Inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method
title_full Inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method
title_fullStr Inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method
title_full_unstemmed Inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method
title_sort inorganically coated colloidal quantum dots in polar solvents using a microemulsion-assisted method
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/106626
https://pubs.rsc.org/en/content/articlelanding/2017/CP/C6CP06982G
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