Synthesis and organic modification of CoAl2O4 nanocrystals under supercritical water conditions

Dinesh Rangappa, Satoshi Ohara, Takashi Naka, Akitsugu Kondo, Masahiko Ishii, Tadafumi Adschiri

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


The synthesis and in situ organic surface modification of cobalt aluminate nanoparticles were carried out to change the hydrophilic surface of pigment nanoparticles to hydrophobic by using organic reagents such as R-COOH and R-NH2 along with the respective metal hydroxide as starting materials at supercritical temperature, under 30-40 MPa pressure at a rapid reaction rate. The organic ligand capping could effectively inhibit the particle growth and also control the size of the nanocrystals. The resultant nanoparticles are dispersed in a binary solvent system, where organic modified particles are dispersed well in an upper organic solvent medium.

Original languageEnglish
Pages (from-to)4426-4429
Number of pages4
JournalJournal of Materials Chemistry
Issue number41
Publication statusPublished - 2007 Oct 22

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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