Structural stability of SiGe nanoparticles under "in situ" electron beam irradiation in TEM

Ortiz Esteban, María Isabel and Rodríguez Domínguez, Andrés and Sangrador García, Jesús and Ballesteros Pérez, Carmen Inés and Kanyinda-Malu, C. and Rodríguez Rodríguez, Tomás (2008). Structural stability of SiGe nanoparticles under "in situ" electron beam irradiation in TEM. pp.. ISSN 1742-6588. https://doi.org/10.1088/1742-6596/126/1/012023.

Description

Title: Structural stability of SiGe nanoparticles under "in situ" electron beam irradiation in TEM
Author/s:
  • Ortiz Esteban, María Isabel
  • Rodríguez Domínguez, Andrés
  • Sangrador García, Jesús
  • Ballesteros Pérez, Carmen Inés
  • Kanyinda-Malu, C.
  • Rodríguez Rodríguez, Tomás
Item Type: Article
Date: January 2008
ISSN: 1742-6588
Volume: 126
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Electrónica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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.

More information

Item ID: 2955
DC Identifier: http://oa.upm.es/2955/
OAI Identifier: oai:oa.upm.es:2955
DOI: 10.1088/1742-6596/126/1/012023
Official URL: http://iopscience.iop.org/1742-6596/126/1
Deposited by: Memoria Investigacion
Deposited on: 03 May 2010 11:01
Last Modified: 20 Apr 2016 12:34
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