Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Structural stability of SiGe nanoparticles under "in situ" electron beam irradiation in TEM
Year:2008
Research Areas
  • Electronics engineering
Information
Abstract
The structure of amorphous and crystalline SiGe nanoparticles, embedded in a dielectric medium, SiO2, and its stability under ¿in situ¿ electron beam irradiation is reported. High-resolution transmission electron microscopy and electron-diffraction pattern simulation by fast Fourier transform was used to analyze the crystal structure of the SiGe nanoparticles. Electron beam irradiation induces structural alternate order-disorder transitions in the nanoparticles for irradiation effects are mainly associated to the density of current. For irradiation with current densities < 7 A·cm-2 no effects are observed in the as-deposited amorphous samples, whereas in the crystallized samples, SiGe nanocrystals show higher stability and no effects are observed for irradiation densities of current < 50 A·cm-2. Irradiation with densities of current greater than these thresholds cause consecutive amorphous-crystalline or crystalline-amorphous structure transitions respectively for both amorphous and crystallized nanoparticles. A hexagonal structure is proposed for those nanocrystals obtained after irradiation in the as deposited amorphous samples.
International
Si
JCR
Si
Title
ISBN
Impact factor JCR
0
Impact info
Volume
126
10.1088/1742-6596
Journal number
0
From page
012023
To page
012027
Month
ENERO
Ranking
Participants
  • Participante: C Ballesteros (Universidad Carlos III de Madrid)
  • Participante: C Kanyinda-Malu
  • Autor: Andres Rodriguez Dominguez (UPM)
  • Autor: Jesus Sangrador Garcia (UPM)
  • Participante: M.I. Ortiz
  • Autor: Tomas Rodriguez Rodriguez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Tecnología Electrónica
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)