ANM
2010
3rd
International Conference on Advanced Nano Materials
12-15 September 2010 - Agadir, Morocco
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Abstract
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ANMM270 |
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ORGANIC- INORGANIC HYBRID MATERIALS BY ATOMIC LAYER
DEPOSITION |
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Ola Nilsen, Karina B. Klepper,
Heidi Ø. Nielsen, Helmer Fjellvåg |
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University of Oslo, Department of Chemistry, Centre for
Materials Science and Nanotechnology, P.O.Box 1033 Blindern, N-0315
Oslo, Norway |
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The
atomic layer deposition (ALD) technique has proved to be very suitable
for deposition of thin films of organic- inorganic hybrid type of
materials. This class of materials combines the rigid structures and
physical properties of inorganic materials with the flexibility and
physicochemical properties of organic compounds. The ALD growth of
these nanostructured hybrid films is enabled by the use of highly
reactive inorganic precursors and particular organic building units
that can bond to the inorganic component via functional groups such as
alcohols, carboxylic acids, amines, etc. The ALD technique enables
design of such materials, constructed from a variety of inorganic and
organic building units, at a resolution of one monolayer. This
represents a major step forward with respect to nanostructured hybrid
materials. Compared to the growth rate of purely inorganic materials by
ALD, the growth rates for hybrid materials are much larger, and
deposition rates as high as 4.2 nm/cycle has been demonstrated, thus
enabling rapid depositions. Dependent on the type of the organic
functional groups, the films range from air stable to air sensitive.
Traditionally the ALD technique has been used for deposition of
materials with a three dimensional network structure. With the aid of
organic- inorganic hybrid materials it has also been possible to
demonstrate growth of thin films of molecular type materials such as
Alq3, Znq3 and Tiq4 (q = 8-hydroxyquinoline). These are potential
candidates as luminescent materials in electroluminescent structures
such as OLEDs.
The unparalleled flexibility in the choice of building units provides a
huge range of possible applications for hybrid materials.
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