Fraunhofer in the Nanoworld Chemical Nanotechnologies

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Fraunhofer in the Nanoworld -Chemical
Nanotechnologies
Dr. Karl-Heinz Haas Fraunhofer Nanotechnology
Alliance haas_at_isc.fhg.de
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Fraunhofer Nanotechnology Alliance 21
Instituteswww.nano.fraunhofer.de
nanomaterials
nanobiotechnology
examples presented chemical nanotechnology
nanooptics/ -electronics
analytics, processing
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Chemical nanotechnologyfor glasses, ceramics and
hybrid polymers (ORMOCERs)
molecular dispersed precursors (organically
modified metal alkoxides)
Sol-Gel-Processing formation of Me-O-Me bonds in
solutionf.e. Si-O-Si
Ceramics, glasses, hybrid polymers
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Chemical nanotechnology - inorganic/hybrid
materials
fibers, membranes
coatings
(nano-) particles
bulk materials

• hardcoats
• barriers, decoration
• corrosion protection
• antisoiling/-fogging
• antireflective
• dielectric layers
• passivation
• optical waveguides
• (polymer) ion conductors
• sensors, adhesives
• piezoelectric
• antimicrobial

• separation processes
• batteries (Li)
• fuel cells
• medical technology
• high-T fibers
• ceramic membranes

• fillers, pigments
• optics
• electronics
• medical technol.
• diagnostics
• cosmetics

• dental composites
• electronics
• (micro-)optics
• ceramic composites
• adaptronic components (piezo-fibers)
• transparent ceramics

succesful product developments
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Redispersible nanoparticles by spray-drying
process
SiO2-nanoparticles ISC-Würzburg
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Nanosilver for antibacterial functions
HyGentic 9000 20 nm
Source \2246\ Luther VDI Study
Commercialization Spin-off company Biogate AG
HyGentic 4000 200 nm
Source Lampe Nov 2006 Biogate AG
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Antibacterial PP-Nanocomposites Nano-Ag
Easy-to-Clean
Development ICT-Karlsruhe with Pearl Capri gt
Injection Moulding
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Nanoparticles with biological functions
Reaction of cells after TNF-modified
SiO2-particle addition (IGB-Stuttgart)
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Selective nano-adsorbers e.g. for removal of
toxic compounds from mixtures
NanoMIP molecularly imprinted polymers
NanoMIP membranes
IGB-Stuttgart
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Nanoporous Materials

• Self-supporting membranes of nanoporous alumina
• oxide with regular pore structures
• Surface functionalization
• with lipid layers to
• achieve size and shape
• separation of
• protein mixtures

Size filtration
chemical filtration electrochemical filtration
tetraether lipide
IWM-Halle
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Topic antireflective coatings ?/4-layers

• optical losses through reflection caused by
  different refractive indices of materials(glass
  air)
• solution coating with controlled refractive
  indexand film thickness of ?/4
• but n1,24 required, no dense solids possible
• solution porous SiO2-layer (d?/4)by sol-gel
  processing
• challenges adhesion, mechanics, large areafilm
  thickness homogeneity

influence spectral widthangledispersion
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Wide-band antireflective coatings with nanoporous
SiO2-layers
nanoporous SiO2-layer on glass (film thickness
120 nm)
ISC-Wuerzburg
Increase of solar efficiency especially between
1-2 µm commercial product
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Materials for dyestuff-sensitized solar-cells
TEM micrograph of 20 nm AlTiO2 synthesized as a
co-gel.
ISE-Freiburg
TiO2 cast on glass coated with SnO2F. Spherical
voids are left behind in the film of TiO2 when
the polystyrene spheres are burnt out during the
sintering of the films at 450 C.
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Hybrid polymers Based on reactive organically
modified inorganic clusters
cluster size 1-5 nm (DLS, SAXS)
.wmf
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Hybrids UV- and/or thermal crosslinking
crosslinked organic-inorganic nanoscaled hybrid
polymer
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Hybrid polymers as transparent hardcoats
ISC-Wuerzburg
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Oxygen barrier layers on polymers SiOx/ hybrid
polymers
vapor-borne wet chemical coatings -gt
synergetic effects
ISC/IVV
lt 0,05 lt 0,05
oxygen-barrier.ppt
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Analytics and simulation
simulation binding of aminosilane on
SiO2 nanoparticle (IFAM, Bunsen 2006)
3D-TEM picture Nanoclay in epoxy matrix (IFAM)
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Fraunhofer NanotechnologyAlliance
New and improved processes and products
21 Fraunhofer Institutes
Nano- bio- technology
Nano- optics/ -electronics
IISB IZM ISE IOF
IGB ITEM IVV
Nano- techno- logy
IAO IUSE IPA IFF TEG
New measuring tools
Processing
IzFP LBF
New materials
www.nano.fraunhofer.de
IFAM, ISC, IKTS, IWM IWS, ICT, IAP
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(Nano)-structures
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Antibacterial polymers and coatings based on
nano-Ag (IFAM)
nano - Ag in silicon / PVC
Test method T.Bechert , Nature Medicine 2000
6(9) 1053
PVC nano-Ag