Unexpected Optical Blue Shift in Large Colloidal Quantum Dots by Anionic Migration and Exchange.

Acebrón, María; Galisteo-López, Juan F; López, Cefe; Herrera, Facundo C; Mizrahi, Martín; Requejo, Félix G; Palomares, F Javier; Juárez, Beatriz H

Acebrón, María; Galisteo-López, Juan F; López, Cefe; Herrera, Facundo C; Mizrahi, Martín; Requejo, Félix G; Palomares, F Javier; Juárez, Beatriz H.

Afiliación

Acebrón M; IMDEA Nanoscience , Faraday 9 , Cantoblanco, 28049 Madrid , Spain.
Galisteo-López JF; Instituto de Ciencias de Materiales de Sevilla (ICMS) , Consejo Superior de Investigaciones Científicas (CSIC) , 41092 Sevilla , Spain.
López C; Instituto de Ciencias de Materiales de Madrid (ICMM) , Consejo Superior de Investigaciones Científicas (CSIC) , 28049 Madrid , Spain.
Herrera FC; Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) , CONICET and FCE, UNLP , CC/16, suc 4 , 1900 La Plata , Argentina.
Mizrahi M; Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) , CONICET and FCE, UNLP , CC/16, suc 4 , 1900 La Plata , Argentina.
Requejo FG; Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) , CONICET and FCE, UNLP , CC/16, suc 4 , 1900 La Plata , Argentina.
Palomares FJ; Instituto de Ciencias de Materiales de Madrid (ICMM) , Consejo Superior de Investigaciones Científicas (CSIC) , 28049 Madrid , Spain.
Juárez BH; IMDEA Nanoscience , Faraday 9 , Cantoblanco, 28049 Madrid , Spain.

J Phys Chem Lett ; 9(11): 3124-3130, 2018 Jun 07.

Article en En | MEDLINE | ID: mdl-29781617

RESUMEN

Compositional changes taking place during the synthesis of alloyed CdSeZnS nanocrystals (NCs) allow shifting of the optical features to higher energy as the NCs grow. Under certain synthetic conditions, the effect of those changes on the surface/interface chemistry competes with and dominates over the conventional quantum confinement effect in growing NCs. These changes, identified by means of complementary advanced spectroscopic techniques such as XPS (X-ray photoelectron spectroscopy) and XAS (X-ray absorption spectroscopy), are understood in the frame of an ion migration and exchange mechanism taking place during the synthesis. Control over the synthetic routes during NC growth represents an alternative tool to tune the optical properties of colloidal quantum dots, broadening the versatility of the wet chemical methods.

Texto completo

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Phys Chem Lett Año: 2018 Tipo del documento: Article País de afiliación: España Pais de publicación: Estados Unidos

Texto completo

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Buscar en Google