Spontaneous Formation of Micrometer-Size Inorganic Peapods

We show that polyoxometalate (ammonium phosphomolybdate) Keggin in aqueous dispersions upon sonication spontaneously transforms into micrometer-sized, peapod-shaped structures. The formation of these peapods is preceded by the generation of spherical aggregates. The particles have been characterized...

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Bibliographic Details
Published in:Langmuir 2007-05, Vol.23 (10), p.5292-5295
Main Authors: Roy, Soumyajit, Rijneveld-Ockers, Maria T, Groenewold, Jan, Kuipers, Bonny W. M, Meeldijk, Hans, Kegel, Willem K
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
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Summary:We show that polyoxometalate (ammonium phosphomolybdate) Keggin in aqueous dispersions upon sonication spontaneously transforms into micrometer-sized, peapod-shaped structures. The formation of these peapods is preceded by the generation of spherical aggregates. The particles have been characterized experimentally by time-resolved dynamic light scattering (DLS), transmission electron microscopy (TEM), and scanning TEM with a high-angle annular dark field detector (STEM-HAADF) for energy-dispersive X-ray (STEM/EDX) elemental analyses. A pathway for the phenomenon is proposed.
ISSN:0743-7463
1520-5827
DOI:10.1021/la700373h