# Surface plasmon resonance (SPR)

We are searching data for your request:

Forums and discussions:
Manuals and reference books:
Data from registers:
Wait the end of the search in all databases.
Upon completion, a link will appear to access the found materials.

Surface plasmon resonance is a method for investigating processes at metal / air or metal / liquid interfaces. Changes in the refractive index up to a depth of a few are recorded $100nm$ over the metal film. Such an analyte can be detected with the help of a recognition structure.

### Principle

• Total reflection of light polarized parallel to the plane of incidence on a metal layer applied to a prism
• Excitation of a plasmon on the metal surface facing away from the prism
• Wavelength or angle-dependent detection of the intensity of the reflected light

### Signal

Displacement of the plasmon as a function of the effective refractive index