Coating of Planar Surfaces

LbL technology was originally developed for planar surfaces (G. Decher) and is therefore suitable for coating and functionalising larger surfaces which can by all means also have a very fine surface structure. In addition to the aforementioned functions of the beads, such as fluorescence or magnetic charge, there are further possibilities offered such as:

  • Super-hydrophobic or super- hydrophilic surfaces
  • Coatings to protect against corrosion of metal
  • Fire-proof coatings on highly-flammable materials

Sol-Gel processes LbL-Films

  • Functional nano and micro particles on the surface
  • Sol-Gel modified LbL layers
  • Sol-Gel layers with nano reservoirs
  • Structured iTiO2 layers with high haemo-compatibilty 

We offer such coatings and their development based on the LbL technology and our expertise.

Planare Öberflächen

Fig. 1: Water drops and the resulting contact angle on a glass surface coated with various LbL layers. Due to the nano-roughness, the properties of the surface can be infinitely adjusted from super hydrophilic to super hydrophobic.

 

 

 

Fig. 2: SEM of 500 nm-sized PS beads, which are immobilized by means of LbL on a planar silica surface.


Fig. 3: Reflectance image of a 100 nm-thick Sol-Gel layer, which has been selectively created in an LbL layer. The interference is caused by the height differences in the swollen state of the gel.

Fig. 4+5: Transmission and fluorescence image of a silica layer with cavities (Ø = 1 µm) which are filled with a fluorescent polymer (some of the cavities are open as can be seen in the image (image size 160 µm x 160 µm).

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