Effect of solvent on organic nanocrystal growth using the reprecipitation method

被引：72

作者：

Chung, Hae-Ryong ^{[1
]}

Kwon, Eunsang ^{[1
]}

Kawa, Hidetoshi ^{[1
]}

Kasai, Hitoshi ^{[1
]}

Nakanishi, Hachiro ^{[1
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF CRYSTAL GROWTH | 2006年 / 294卷 / 02期

关键词：

growth models; nanocrystallization; solubility; solvents; aromatic compounds; nanomaterials;

D O I：

10.1016/j.jcrysgro.2006.07.010

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

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. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：459 / 463

页数：5

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