Kink distance and binding energy of colloidal crystals

Jun Nozawa, Satoshi Uda, Suxia Guo, Akiko Toyotama, Junpei Yamanaka, Naoki Ihara, Junpei Okada

研究成果: Article査読

4 被引用数 (Scopus)

抄録

Particle interaction is a critical parameter for growth kinetics of colloidal crystals. The equilibrium concentration and step free energy are strongly dependent on the particle interaction. The growth mechanism of the attractive system of colloidal crystals is similar to that of vapor or solution growth, where crystals grow by incorporating diffusing ad-particles on the terrace into kinks of steps (Terrace-Step-Kink model). Here, we have applied the theory of crystal growth to experimentally determine the binding energy that originates from the particle interaction. We focus on the relationship between kink distance and bond energy, which is described by BCF (Burton-Cabrera-Frank) theory. The value of the step free energy determined by the kink distance measurement agrees well with the values obtained from other measurements, including nucleation rate and critical radius. The obtained value also accounts well for the change in step velocity of two-dimensional islands, which is due to the Gibbs-Thomson effect. The measurement of binding energy contributes significantly to the fundamental study of colloidal science as well as to technology for growing high quality colloidal crystals.

本文言語English
ページ(範囲)6078-6083
ページ数6
ジャーナルCrystal Growth and Design
18
10
DOI
出版ステータスPublished - 2018 10 3

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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