TY - JOUR
T1 - Effect of solvent on organic nanocrystal growth using the reprecipitation method
AU - Chung, Hae Ryong
AU - Kwon, Eunsang
AU - Oikawa, Hidetoshi
AU - Kasai, Hitoshi
AU - Nakanishi, Hachiro
PY - 2006/9/4
Y1 - 2006/9/4
N2 - We have fabricated organic nanocrystals of low-molecular-weight aromatic compounds such as perylene and anthracene using the so-called reprecipitation method, in which a dilute solution of the compound prepared by water-soluble solvent, i.e., good solvent, is injected into vigorously stirred water as a poor medium. The resulting nanocrystals are dispersed stably in water. It was found that the average size of perylene nanocrystals formed, as evaluated by dynamic light scattering technique, decreased as the dielectric constant of the good solvent increased, while the size of the anthracene nanocrystals increased with increasing dielectric constant due to association in the aqueous dispersion liquid. The influence of solvent polarity and solubility on the nanocrystallization process in the reprecipitation method is discussed in detail.
AB - We have fabricated organic nanocrystals of low-molecular-weight aromatic compounds such as perylene and anthracene using the so-called reprecipitation method, in which a dilute solution of the compound prepared by water-soluble solvent, i.e., good solvent, is injected into vigorously stirred water as a poor medium. The resulting nanocrystals are dispersed stably in water. It was found that the average size of perylene nanocrystals formed, as evaluated by dynamic light scattering technique, decreased as the dielectric constant of the good solvent increased, while the size of the anthracene nanocrystals increased with increasing dielectric constant due to association in the aqueous dispersion liquid. The influence of solvent polarity and solubility on the nanocrystallization process in the reprecipitation method is discussed in detail.
KW - A1. Growth models
KW - A1. Nanocrystallization
KW - A1. Solubility
KW - A1. Solvents
KW - B1. Aromatic compounds
KW - B1. Nanomaterials
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U2 - 10.1016/j.jcrysgro.2006.07.010
DO - 10.1016/j.jcrysgro.2006.07.010
M3 - Article
AN - SCOPUS:33845582124
SN - 0022-0248
VL - 294
SP - 459
EP - 463
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
IS - 2
ER -