Effect of solvent on organic nanocrystal growth using the reprecipitation method

Hae Ryong Chung, Eunsang Kwon, Hidetoshi Oikawa, Hitoshi Kasai, Hachiro Nakanishi

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)459-463
Number of pages5
JournalJournal of Crystal Growth
Volume294
Issue number2
DOIs
Publication statusPublished - 2006 Sep 4

Keywords

  • A1. Growth models
  • A1. Nanocrystallization
  • A1. Solubility
  • A1. Solvents
  • B1. Aromatic compounds
  • B1. Nanomaterials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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