RT Journal Article
T1 Zn_2GeO_4/SnO_2 nanowire heterostructures driven by plateau-rayleigh instability
A1 Dolado Fernández, Jaime
A1 Renforth, Kate L.
A1 Nunn, James E
A1 Hindsmarsh, Steve A.
A1 Hidalgo Alcalde, Pedro
A1 Sánchez, Ana M.
A1 Méndez Martín, Bianchi
AB Herein, we report the formation of a particular core-shell structure, with a zinc germanate (Zn_2GeO_4) nanowire core and a discontinuous shell of SnO_2 nanocrystals, obtained in a single-step process. We propose a growth model that combines the Plateau-Rayleigh mechanism to produce a pattern of amorphous germanium oxide (a-GeO_2) particles along the Zn_2GeO_4 nanowire and the subsequent growth of well-faceted SnO_2 crystals when the nanowire orientation meets good lattice matching conditions. In this latter case, the linear array of a-GeO_2 particles acts as nucleation sites for the SnO_2 crystallites, leading to a skewer-like morphology that retains the periodicity of the Plateau-Rayleigh process. Otherwise, nanowires with different orientations appear decorated with a pattern of a-GeO_2 beads mimicking a necklace. Atomic resolution electron microscopy has been used to characterize the Zn_2GeO_4/SnO_2 nanoheterostructures. In addition, optical confinement effects have been observed in the luminescence maps and spectra, which have potential for further exploitation in the design of optical microcavities.
PB American Chemical Society
SN 1528-7483
YR 2020
FD 2020-01
LK https://hdl.handle.net/20.500.14352/6071
UL https://hdl.handle.net/20.500.14352/6071
LA eng
NO ©2020 American Chemical SocietyThis work was supported by the Spanish Ministry of Innovation, Science and Technology through Research Projects MAT-2015-65274-R/FEDER, RTI2018-097195-B-100 and M-ERA.NET PCIN-2017-106.
NO Ministerio de Ciencia e Innovación (MICINN)/M-ERA.Net
NO Ministerio de Ciencia e Innovación (MICINN)/ FEDER
NO Ministerio de Ciencia e Innovación (MICINN)
DS Docta Complutense
RD 4 may 2024