Coating Planar Surfaces
LbL technology was originally developed for planar surfaces (G. Decher). It is therefore suitable for coating and functionalizing larger surfaces in order to fine-tune surface structure. LbL coatings can create for example:
- Super-hydrophobic or super-hydrophilic surfaces (Fig. 1)
- Coatings to protect against corrosion of metal
- Fire-proof coatings on highly-flammable materials
- Bio-reactive surfaces
Even further, Sol-Gel processes of LbL films help create:
- Functional nano and micro particles on the surface (Fig. 2)
- Sol-Gel modified LbL layers (Fig. 3)
- Sol-Gel layers with nano reservoirs (Fig. 4+5)
- Structured iTiO2 layers with high haemo-compatibilty
Applications of LbL coatings include consumer goods, cosmetics, pharmecueticals, sensors, electronics and many more. Just CONTACT US and talk about your technical desire or challenge. Together, we will develop the best solution.
Fig. 1: Contact angle of water droplet on a glass surface coated with various LbL layers. Due to the nanoscale roughness and rich outer material options, surface properties can be 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 film, 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 the image shows (image size 160 µm x 160 µm).