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Organic-Inorganic Hybrid Materials Processing And Applications

Published online by Cambridge University Press:  10 February 2011

H. K. Schmidt ,
M. Mennig ,
R. Nonninger ,
P. W. Oliveira  and
H. Schirra
H. K. Schmidt
Affiliation:
Institut fuer Neue Materialien gem. GmbH, Im Stadtwald, Bldg. 43 A, D-66 123 Saarbruecken, Germany, [email protected]
M. Mennig
Affiliation:
Institut fuer Neue Materialien gem. GmbH, Im Stadtwald, Bldg. 43 A, D-66 123 Saarbruecken, Germany, [email protected]
R. Nonninger
Affiliation:
Institut fuer Neue Materialien gem. GmbH, Im Stadtwald, Bldg. 43 A, D-66 123 Saarbruecken, Germany, [email protected]
P. W. Oliveira
Affiliation:
Institut fuer Neue Materialien gem. GmbH, Im Stadtwald, Bldg. 43 A, D-66 123 Saarbruecken, Germany, [email protected]
H. Schirra
Affiliation:
Institut fuer Neue Materialien gem. GmbH, Im Stadtwald, Bldg. 43 A, D-66 123 Saarbruecken, Germany, [email protected]
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Abstract

Hybrid materials as inorganic-organic nanostructured composites require tailored surface chemistry in order to obtain a homogeneous distribution of the nanoparticles in the matrix. For this reason, nanoparticles with organic functions have been synthesized, first, to provide the desired ζ-potential at a given pH value, second, to avoid irreversible agglomeration due to the spacing effect, and third, to provide the appropriate surface chemistry. I could be shown that using this approach, it is possible to switch the ζ-potential of SiO2 nanoparticles from a negative to a positive potential at neutral and to bind DNA fragments to the particles for an effective transfection into cells. Other examples show that nanoparticles (TiO2, SiC2) coated with epoxy and methacryloxy groupings can be used as coating sol for the fabrication of thin films with green densities up to 67 % by volume only by photochemical crosslinking of the polymerizable groupings. Using this approach, interference layers have been fabricated on transparent plastics. In soft matrices, these particles permit to establish appropriate ζ-potentials and in electric fields by electrophoresis, it was possible to up-concentrate them to form gradient index optics. The investigations show that surface chemistry-tailored nanoparticles are a useful tool for the fabrication of nanocomposite hybrids.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 576: Symposium DD – Organic/Inorganic Hybrid Materials II , 1999 , 395
Copyright
Copyright © Materials Research Society 1999

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References

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