nano-reactor (rus. нанореактор) — a reactor used to carry out chemical reactions in a limited space, whose size does not exceed 100 nm in at least one of its dimensions and is physically limited by the dimensions of the ordered structure elements.

Description

The key role of nanoreactors is to prevent the fusion and growth of solid particles during the synthesis process and, in some cases, in the course of subsequent heat treatment of synthesised materials. Nanoreactors are usually represented by pores of a natural or artificial material that is inert to the reagents and products of the reaction. When nanoobjects are synthesised, pores of an inert matrix are filled with one of the reagents, and the matrix is brought into contact with the other reagent (usually in the liquid or gas phase), the initiator (in the case of polymerisation), or exposed to an electric current (in the case of electrochemical synthesis). By controlling the size of pores in an artificial porous material or selecting a natural porous material with a narrow size distribution of pores in the required range, engineers can control the size of synthesised particles. Nanoreactors can be used both to produce nanocomposites of a synthesised material with the material of the inert matrix and to produce isolated nanoobjects, in which case matrices are subject to selective dissolution. Natural nanoreactors are often represented by zeolites and layered double hydroxides, and artificial nanoreactors – by artificial zeolites and porous membranes based on metal oxides produced in the electrochemical synthesis process (see anodizing).

Illustrations

Generation of different morphology iron-based magnetic nanoparticles in a matrix o layered doub
Generation of different morphology iron-based magnetic nanoparticles in a matrix o layered double hydroxide depending on experimental conditions [1].

Authors

  • Goodilin Evgeny A.
  • Shlyakhtin Oleg A.

Sources

  1. Yu D Tretyakov, A V Lukashin, A A Eliseev Synthesis of functional nanocomposites based on solid-phase nanoreactors (in Russian) // Uspekhi khimii. 2004. V. 73. №9. 974–998 pp.
  2. Grigor'eva N. A.et al. Method for Producing the ordered nano-composite materials (in Russian). Russian patent №2 322 384 dd 16.10.2006.
  3. Miura K. et al. Nano-reactor for producing high performance nanomaterials // Chem. Eng. News. 2007. V. 62. P. 5655–5660.
  4. Nakajima H. et al. Preparation and characterization of polypropylene/mesoporous silica nanocomposites with confined polypropylene // J. Polymer Sci. B. 2003. V. 41. P. 3324–3332.
  5. Microstructure of new functional materials. Ed. 1 (in Russian). — Мoscow: MGU, 2006. — 10 pp. —www.fnm.msu.ru/documents/8/poroes.pdf (reference date: 12.12.2011).

Contact us