Adsorption, desorption, surface diffusion, lattice defect formation, and kink incorporation processes of particles on growth interfaces of colloidal crystals with attractive interactions

Yoshihisa Suzuki, Yoshiaki Hattori, Jun Nozawa, Satoshi Uda, Akiko Toyotama, Junpei Yamanaka

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Good model systems are required in order to understand crystal growth processes because, in many cases, precise incorporation processes of atoms or molecules cannot be visualized easily at the atomic or molecular level. Using a transmission-type optical microscope, we have successfully observed in situ adsorption, desorption, surface diffusion, lattice defect formation, and kink incorporation of particles on growth interfaces of colloidal crystals of polystyrene particles in aqueous sodium polyacrylate solutions. Precise surface transportation and kink incorporation processes of the particles into the colloidal crystals with attractive interactions were observed in situ at the particle level. In particular, contrary to the conventional expectations, the diffusion of particles along steps around a two-dimensional island of the growth interface was not the main route for kink incorporation. This is probably due to the number of bonds between adsorbed particles and particles in a crystal; the number exceeds the limit at which a particle easily exchanges its position to the adjacent one along the step. We also found novel desorption processes of particles from steps to terraces, attributing them to the assistance of attractive forces from additionally adsorbing particles to the particles on the steps.

Original languageEnglish
Article number80
JournalCrystals
Volume6
Issue number7
DOIs
Publication statusPublished - 2016 Jul

Keywords

  • Attractive interaction
  • Colloidal crystal
  • Incorporation process
  • Polystyrene particle
  • Sodium polyacrylate
  • Surface diffusion

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry

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