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Science 6 November 1998:
Vol. 282. no. 5391, pp. 1111 - 1114
DOI: 10.1126/science.282.5391.1111
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Reports
Nanoengineering of Inorganic and Hybrid Hollow Spheres by Colloidal Templating
Frank Caruso,
*
Rachel A. Caruso,
Helmuth Möhwald
Hollow silica and silica-polymer spheres with diameters between 720 and 1000 nanometers were fabricated by consecutively assembling silica
nanoparticles and polymer onto colloids and subsequently removing the
templated colloid either by calcination or decomposition upon exposure
to solvents. Scanning and transmission electron microscopy images
demonstrate that the wall thickness of the hollow spheres can be
readily controlled by varying the number of nanoparticle-polymer deposition cycles, and the size and shape are determined by the morphology of the templating colloid. The hollow spheres produced are
envisioned to have applications in areas ranging from medicine to
pharmaceutics to materials science.
F. Caruso and H. Möhwald, Max Planck Institute of Colloids
and Interfaces, Rudower Chaussee 5, D-12489 Berlin, Germany. R. A. Caruso, Max Planck Institute of Colloids and Interfaces, Kantstrasse
55, D-14513 Teltow-Seehof, Germany.
*
To whom correspondence should be addressed. E-mail:
caruso{at}mpikg.fta-berlin.de
Read the Full Text
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