Formation of nanoclusters in Au-implanted bismuth tellurite

A. Kling, M. F. Da Silva, J. C. Soares, P. F.P. Fichtner, L. Amaral, F. Zawislak, I. Földvári, Á Péter

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

Bismuth tellurite single crystals have been implanted with 800 keV Au+ ions to a fluence of 1 × 1016 cm-2 at room temperature. Heat treatments of the samples were performed at temperatures ranging from 400°C to 700°C for 2 h at ambient atmosphere in a conventional furnace. Strong absorption maxima in the range from 600 to 630 nm and an intense blue-green color in the optical absorption spectra indicate the formation of Au-clusters. The average cluster radii were estimated to be between 3 and 4 nm for annealings performed at 500°C and 600°C. Rutherford backscattering (RBS)/channeling studies reveal that at temperatures suitable for the formation of nanoclusters no recrystallization takes place. On the other hand, a significant lattice recovery is observed for annealing at 400°C for which no cluster formation was observed.

Original languageEnglish
Pages (from-to)331-334
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume175-177
DOIs
Publication statusPublished - Apr 1 2001
Event12th International Conference on Ion Beam Modification of Materials - Rio Grande do Sul, Brazil
Duration: Sep 3 2000Sep 8 2000

Keywords

  • Bismuth tellurite
  • Ion implantation
  • Nanocluster
  • Optical absorption

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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