The controlled transition-metal doping of SnO_2 nanoparticles with tunable luminescence



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Peche Herrero, M. A. and Maestre Varea, David and Ramirez Castellanos, J. and Cremades Rodríguez, Ana Isabel and Piqueras de Noriega, Javier and González Calvet, J. M. (2014) The controlled transition-metal doping of SnO_2 nanoparticles with tunable luminescence. CrystEngComm, 16 (14). pp. 2969-2976. ISSN 1466-8033

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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.

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© RSC Royal Society of Chemistry.
This work was supported by MEC (MAT2012-39159 and Consolider CSD 2009-00013). The authors are grateful to the National Centre for Electron Microscopy (CNME) at Universidad Complutense de Madrid.

Uncontrolled Keywords:Diluted Magnetic Semiconductor, Sol-Gel Method, Tin Oxide, Room-Temperature, Hydrothermal Synthesis, Nanocrystals, Growth, Microstructure, Ferromagnetism, Nanowires
Subjects:Sciences > Physics > Materials
ID Code:25626
Deposited On:05 Jun 2014 16:13
Last Modified:05 Jun 2014 16:13

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