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Aerosol-assisted self-assembly of mesostructured spherical nanoparticles

Author

Listed:
  • Yunfeng Lu

    (University of New Mexico/NSF Center for Micro-Engineered Materials, The Advanced Materials Laboratory)

  • Hongyou Fan

    (University of New Mexico/NSF Center for Micro-Engineered Materials, The Advanced Materials Laboratory)

  • Aaron Stump

    (University of New Mexico/NSF Center for Micro-Engineered Materials, The Advanced Materials Laboratory)

  • Timothy L. Ward

    (University of New Mexico/NSF Center for Micro-Engineered Materials, The Advanced Materials Laboratory)

  • Thomas Rieker

    (University of New Mexico/NSF Center for Micro-Engineered Materials, The Advanced Materials Laboratory)

  • C. Jeffrey Brinker

    (University of New Mexico/NSF Center for Micro-Engineered Materials, The Advanced Materials Laboratory
    Sandia National Laboratories)

Abstract

Particles possessing nanometre-scale pores of well-defined size and connectivity are of interest for catalysis, chromatography and controlled release of drugs, and as fillers with low dielectric constant, pigments and hosts for optically active compounds1,2. Silica containing ordered mesopores (of nanometre-scale width) can be prepared by templating of surfactant3,4 and block copolymer5 liquid-crystalline mesophases, and interfacial phenomena have been used to control the macroscopic form of these materials, providing mesoporous particles1,6, fibres7,8 and films9,10. A variety of spherical or nearly spherical particles has been reported1,6,7,11,12,13, but the degree of ordering and the range of the porous mesostructures have been limited. Here we report a rapid, aerosol-based14,15,16 process for synthesizing solid, well-ordered spherical particles with stable pore mesostructures of hexagonal and cubic topology, as well as layered (vesicular) structures. Our method relies on evaporation-induced interfacial self-assembly17 confined to spherical aerosol droplets. This simple, generalizable process can be modified for the formation of ordered mesostructured thin films.

Suggested Citation

  • Yunfeng Lu & Hongyou Fan & Aaron Stump & Timothy L. Ward & Thomas Rieker & C. Jeffrey Brinker, 1999. "Aerosol-assisted self-assembly of mesostructured spherical nanoparticles," Nature, Nature, vol. 398(6724), pages 223-226, March.
    • Handle: RePEc:nat:nature:v:398:y:1999:i:6724:d:10.1038_18410
    DOI: 10.1038/18410
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