Large surface area sensors

The Layer-by-layer coating of surfaces with polymers marked with fluorescent sensor molecules enables the fabrication of large surface area sensors. Especially nanoporous filter or glass materials give extremely intense fluorescence signals once coated as they offer a large specific area (see figure). Due to the direct contact of the sensor molecules with the medium, the response is extremely fast.

Figure: Porous glass bodies coated with pH-sensitive fluorescent polyelectrolyte in different pH environments (Excitation at 254 nm).

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