BioGold SPR Substrates :
Surface plasmon resonance (SPR) occurs when light energy couples into the electromagnetic field at a metal-coated surface. The reflectivity of the incident light is inverse to the extent of plasmon resonance, and is determined by the identity and the thickness of the metal layer, the angle of incidence, the wavelength of the incident light, and the refractive index of the medium at the interface. Because the refractive index is proportional to the amount of adsorbate at the surface, SPR has been used as a quantitative, sensitive, and label-free technique for measuring the binding kinetics of proteins, DNA, and small molecules, to surface immobilized capture agents.
Available in 25, 35 and 45 nm gold (99.9% pure) thicknesses, over titanium or chromium binding layers as well as 80 nm over binding layer.
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