RT Journal Article
T1 The role of impurities in the shape, structure and physical properties of semiconducting oxide nanostructures grown by thermal evaporation
A1 López García, Iñaki
A1 Cebriano Ramírez, Teresa
A1 Hidalgo Alcalde, Pedro
A1 Nogales Díaz, Emilio
A1 Piqueras De Noriega, Francisco Javier
A1 Méndez Martín, María Bianchi
AB A thermal evaporation method developed in the research group enables to grow and design several morphologies of semiconducting oxide nanostructures, such as Ga_2O_3, GeO_2 or Sb_2O_3, among others, and some ternary oxide compounds (ZnGa_2O_4, Zn_2GeO_4). In order to tailor physical properties, a successful doping of these nanostructures is required. However, for nanostructured materials, doping may affect not only their physical properties, but also their morphology during the thermal growth process. In this paper, we will show some examples of how the addition of impurities may result into the formation of complex structures, or changes in the structural phase of the material. In particular, we will consider the addition of Sn and Cr impurities into the precursors used to grow Ga_2O_3, Zn_2GeO_4 and Sb_2O_3 nanowires, nanorods or complex nanostructures, such as crossing wires or hierarchical structures. Structural and optical properties were assessed by electron microscopy (SEM and TEM), confocal microscopy, spatially resolved cathodoluminescence (CL), photoluminescence, and Raman spectroscopies. The growth mechanisms, the luminescence bands and the optical confinement in the obtained oxide nanostructures will be discussed. In particular, some of these nanostructures have been found to be of interest as optical microcavities. These nanomaterials may have applications in optical sensing and energy devices.
PB American Institute of Materials Science (AIMS)
SN 2372-0468
YR 2016
FD 2016
LK https://hdl.handle.net/20.500.14352/24585
UL https://hdl.handle.net/20.500.14352/24585
LA eng
NO © American Institute of Materials Science (AIMS).This work has been supported by MINECO (Projects MAT 2012–31959, MAT 2015-65274R and CSD 2009–00013). The authors also acknowledge EAA Grants (NILS project 008–ABEL CM–2013).
NO Ministerio de Economía y Competitividad (MINECO)
NO Mecanismo Financiero del Espacio Económico Europeo = EEA Scholarship Programme (EEA Grants)
DS Docta Complutense
RD 22 abr 2025