Orientation-dependent impurity partitioning of colloidal crystals

Jun Nozawa, Satoshi Uda, Sumeng Hu, Kozo Fujiwara, Haruhiko Koizumi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Impurity partitioning during colloidal crystallization was investigated for grains with different orientations. Particles of various sizes were doped as impurities during the growth of colloidal polycrystals. The effective partition coefficient, keff, which is the impurity concentration in the solid (CS) divided by that in initial solution (CL), was measured for grains oriented in the [111] and [100] directions normal to the growth direction. The [111]-oriented grains were found to have a larger keff than [100]-oriented grains. This was analyzed by using the Thurmond and Struthers model. Though both [111]- and [100]-oriented grains were face centered cubic (fcc) structures, within several layers of crystals, the volume fraction of [111]-oriented grains was larger than that of [100]-oriented grains, yielding a larger driving force for nucleation, ΔGTr, and thus a larger equilibrium partition coefficient, k0, for [111]-oriented grains.

Original languageEnglish
Pages (from-to)13-18
Number of pages6
JournalJournal of Crystal Growth
Volume439
DOIs
Publication statusPublished - 2016 Apr 1

Keywords

  • A1. Colloidal crystals
  • A1. Growth models
  • A1. Impurities
  • A1. Interfaces
  • A1. Solidification

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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