Creation of 3-dimensional carbon nanostructures from UV irradiation of carbon dioxide at room temperature

Ortrud Aschenbrenner, Takahiro Fukuda, Takashi Hasumura, Toru Maekawa, Vladimir M. Gun'Ko, Sergey V. Mikhalovsky, Andrew B. Cundy, Raymond L.D. Whitby

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A method is presented for the production of carbon nanomaterials from carbon dioxide in a low temperature process. In this method, carbon dioxide is irradiated with an ultraviolet laser at the conditions of critical opalescence where light is scattered and absorbed. Spherical carbon nanoparticles are obtained under these conditions on metal substrates without any additional catalyst near room temperature. The particles are of approximately uniform shape and size of around 100 nm. Some of the particles form clusters. The method is reproducible on different substrates. Quantum chemical calculations have been employed in order to elucidate the role of critical opalescence and of the substrate. The calculations show that the presence of molecular clusters at the critical point is essential in decreasing the excitation energy. The dissociation reaction most likely occurs on the surface of the substrate, where the excitation energy is decreased even further.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalJournal of Supercritical Fluids
Publication statusPublished - Dec 2012


  • Carbon dioxide conversion
  • Carbon nanomaterials
  • Critical opalescence
  • Photolysis
  • Supercritical carbon dioxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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