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Membranes used in Biosensors

Membranes play a crucial role in the functionality of biosensors, serving as a protective barrier between the sample and the sensor, while also amplifying the sensor's selectivity and sensitivity. Various types of membranes are employed in biosensors, each with distinct applications:

Polymer Membranes: Polymer Membranes are popular options for biosensors, along with polyurethane and polyethylene. By including particular functional groups or biomolecules, polymer membranes can be tailored to increase sensor selectivity.

Lipid Membranes: Lipid membranes, which include liposomes and lipid bilayers, resemble biological membranes and serve as a basis for the identification of biomolecules linked with membranes. The sensitivity and selectivity of the sensor can be increased by adding receptors or antibodies to sensors.

Hydrogel Membranes: Hydrogel membranes like polyacrylamide and agarose are utilized for immobilizing enzymes and other biomolecules in biosensors. Functional group modifications enhance the binding of the target analyte, thereby improving sensitivity and selectivity.

Ceramic Membranes: Zeolites and alumina are two examples of ceramic membranes that provide stability and rigidity to biosensors that are used to detect gases and tiny molecules. To improve sensor sensitivity and selectivity, these membranes can be customized with particular functional groups.

Nanoporous Membranes: Nanoporous membranes such as nanofibers and nanotubes provide a high surface area for biomolecule detection. They can be customized with receptors or antibodies to heighten sensor sensitivity and selectivity.

The particular application and the properties of the target substance determine which membrane is best for a certain biosensor. The sensitivity, selectivity, and general performance of the biosensor can be improved for a wide range of applications by carefully selecting and altering the membrane.

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