TY - JOUR
T1 - Adsorption, desorption, surface diffusion, lattice defect formation, and kink incorporation processes of particles on growth interfaces of colloidal crystals with attractive interactions
AU - Suzuki, Yoshihisa
AU - Hattori, Yoshiaki
AU - Nozawa, Jun
AU - Uda, Satoshi
AU - Toyotama, Akiko
AU - Yamanaka, Junpei
PY - 2016/7
Y1 - 2016/7
N2 - 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.
AB - 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.
KW - Attractive interaction
KW - Colloidal crystal
KW - Incorporation process
KW - Polystyrene particle
KW - Sodium polyacrylate
KW - Surface diffusion
UR - http://www.scopus.com/inward/record.url?scp=84983304245&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84983304245&partnerID=8YFLogxK
U2 - 10.3390/cryst6070080
DO - 10.3390/cryst6070080
M3 - Article
AN - SCOPUS:84983304245
VL - 6
JO - Crystals
JF - Crystals
SN - 2073-4352
IS - 7
M1 - 80
ER -