Authors Palumbo, M. ; Pearson, C. ; Nagel, J. ; Petty, M. C.
Title A single chip multi-channel surface plasmon resonance imaging system
Date 03.06.2003
Number 10997
Abstract A single chip, multi-channel surface plasmon resonance (SPR) imaging system has been developed. The equipment has no moving parts and uses a single sensor chip on which multiple channels can be incorporated. A light emitting diode is used as a photon source while a CCD camera forms the detector. The optical configuration has been designed to achieve a uniform illumination of the sample over a fixed area with a range of incident angles. A calibration test using sucrose solutions shows that the sensitivity of the equipment is 4.3×10-4 refractive index units per pixel line-pair. The use of the system for simultaneous interrogation of different polyelectrolyte thin films, formed by the electrostatic layer-by-layer deposition method, is demonstrated. A reversible pH-dependent response for these organic layers is also reported.
Publisher Sensors and Actuators / B
Citation Sensors and Actuators / B 90 (2003) 264-270

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