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Mobile SPR sensor system

A laboratory prototype of an eight-channel mobile surface plasmon resonance (SPR) sensor was developed at IREE. The sensor exploits the spectral modulation and the wavelength division multiplexing (WDM).

The wavelength division multiplexing is realized in a special multireflection sensing element coated with a thin film of SPR-active metal. The mobile SPR sensor encompassed the following key subsystems: an SPR coupling optics, a miniature broadband light source, a multichannel spectrograph module, a microfluidic flow-cell and supporting electronics.

Performed characterization experiments confirmed that the wavelength division multiplexed sensing channels exhibit minimum cross-sensitivity and that this approach is indeed a viable approach for the development of multichannel SPR sensing devices.

In model refractometric experiments it was demonstrated that the laboratory prototype of the mobile SPR sensor can detect variations in the refractive index as small as 10E-6 RIU (refractive index unit).

This sensor presents a generic sensing platform and can be combined with specific biorecognition elements and applied for detection of numerous chemical or biological analytes.

Reported by

ARC Seibersdorf research GmbH
Forschungszentrum Seibersdorf
2444 Seibersdorf