Supercritical Hydrothermal Synthesis of Nanoparticles

Akira Yoko, Tsutomu Aida, Nobuaki Aoki, Daisuke Hojo, Masanori Koshimizu, Satoshi Ohara, Gimyeong Seong, Seiichi Takami, Takanari Togashi, Takaaki Tomai, Takao Tsukada, Tadafumi Adschiri

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

16 Citations (Scopus)


In this chapter, nanoparticle synthesis using supercritical water is introduced. The characteristic phase behavior of supercritical water enables organic ligand modification, and fine tuning of particle size and morphology can be realized by the method. Synthesis of metal nanoparticles is possible in homogeneous reductive atmosphere provided in supercritical water. Nanocatalysts and radiation detection materials are presented as promising applications of the fine-tuned nanoparticles synthesized in supercritical water. In addition, mechanistic studies of nanoparticle formation in supercritical water were reviewed, including kinetics analysis of particle formation with a flow reactor, visualization of supercritical water flow with neutron beams, and in situ measurements of structural formation of nanoparticles using synchrotron X-rays.

Original languageEnglish
Title of host publicationNanoparticle Technology Handbook
Number of pages7
ISBN (Print)9780444641106
Publication statusPublished - 2018 May 11


  • Nanocatalyst
  • Nanocrystals
  • Nanoparticle formation
  • Organic-inorganic hybrid nanoparticles
  • Supercritical hydrothermal synthesis
  • Supercritical water


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