Copper nanocolloids in MgO crystals implanted with Cu ions

Begoña Savoini, Daniel Cáceres, Roberto Gonzalez González, Yok Chen, Joana Vaz Pinto, Rui C. da Silva , Eduardo Jorge Alves

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Citations (Scopus)


Rutherford backscattering and optical absorption measurements were used to characterize both intrinsic and extrinsic defects produced in MgO single crystals by implantation with 250 keV Cu2+ ions at a fluence of 1 x 10(17) ions/ cm(2). Several absorption bands identical to those found in neutron irradiated crystals were observed and have been previously associated with oxygen vacancies and higher-order defects involving oxygen vacancies. In addition, a broad extinction band centered at approximate to3.0 eV is observed and is attributed to copper precipitates. The maximum concentration of the implanted Cu ions occurs at a penetration depth of approximate to130 nm. The copper colloids start to dissolve at temperatures above 1100 K and by 1500 K most of the copper ions have diffused into substitutional sites. Hardening induced by implantation was characterized by nanoindentation measurements.
Original languageEnglish
Title of host publicationProceedings of the Twelfth International Conference on Radiation (REI-12)
EditorsL. Amaral , M. Behar , F. C. Zawislak
Place of PublicationAmsterdam
Publication statusPublished - Jun 2004
Event12th International Conference on Radiation Effects in Insulators (REI-12) - Gramado, Brazil
Duration: 31 Aug 20035 Sept 2003
Conference number: 12th

Publication series

NameNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
PublisherElsevier Science B.V.
Number1-4 June
ISSN (Print)0168-583X


Conference12th International Conference on Radiation Effects in Insulators (REI-12)


  • Defects
  • Ion implantation
  • MgO
  • Precipitates


Dive into the research topics of 'Copper nanocolloids in MgO crystals implanted with Cu ions'. Together they form a unique fingerprint.

Cite this