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ID 115077
著者
Hattori, Yoshiaki Tokushima University
Nozawa, Jun Tohoku University
Uda, Satoshi Tohoku University
Toyotama, Akiko Nagoya City University
Yamanaka, Junpei Nagoya City University
キーワード
colloidal crystal
polystyrene particle
sodium polyacrylate
attractive interaction
surface diffusion
incorporation process
資料タイプ
学術雑誌論文
抄録
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.
掲載誌名
Crystals
ISSN
20734352
出版者
MDPI
6
7
開始ページ
80
発行日
2016-07-18
権利情報
© 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
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言語
eng
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出版社版
部局
理工学系