|
Título:
|
The controlled transition-metal doping of SnO_2 nanoparticles with tunable luminescence
|
|
Autores:
|
Peche Herrero, M. A. ;
Maestre Varea, David ;
Ramirez Castellanos, J. ;
Cremades Rodríguez, Ana Isabel ;
Piqueras de Noriega, Javier ;
Gonzalez Calvet, J. M.
|
|
Tipo de documento:
|
texto impreso
|
|
Editorial:
|
RSC Royal Society of Chemistry, 2014
|
|
Palabras clave:
|
Estado = Publicado
,
Materia = Ciencias: Física: Física de materiales
,
Tipo = Artículo
|
|
Resumen:
|
SnO_2 nanoparticles doped with transition metals (V, Cr, Mn) have been synthesized by both the hydrothermal method (HDT) in a basic media and the liquid mixed method (LQM) based on the Pechini method. Nanocrystalline particles obtained via a liquid mixed technique show a well-defined chemical composition and an average size of 6 nm, with a high degree of both crystallinity and chemical homogeneity. Nanoparticles prepared via a hydrothermal method exhibit a high dispersion in size as well as agglomeration effects. As the LQM demonstrates advantages with respect to the HDT, a more detailed investigation has been carried out on the SnO_2 nanoparticles doped with V, Cr and Mn grown by this method. The microstructure of the materials was elucidated by means of X-ray Diffraction (XRD), Selected-Area Electron Diffraction (SAED), and High-Resolution Transmission Electron Microscopy (HRTEM). Luminescence from undoped and doped SnO_2 nanoparticles was characterized by cathodoluminescence (CL). The luminescence studies demonstrate a strong dependence of CL signals with transition metal doping, thus inducing red, green or orange emissions when doping with Cr, V or Mn respectively.
|
