Surface Plasmon Resonance Imaging Measurements of Ultrathin Organic Films

Abstract

The surface-sensitive optical technique of surface plasmon resonance (SPR) imaging is used to characterize ultrathin organic and biopolymer films at metal interfaces in a spatially resolved manner. Because of its high surface sensitivity and its ability to measure in real time the interaction of unlabeled biological molecules with arrays of surface-bound species, SPR imaging has the potential to become a powerful tool in biomolecular investigations. Recently, SPR imaging has been successfully implemented in the characterization of supported lipid bilayer films, the monitoring of antibody-antigen interactions at surfaces, and the study of DNA hybridization adsorption. The following is included in this review: (a) an introduction to the principles of surface plasmon resonance, (b) the details of SPR imaging instrumental design, (c) a short discussion concerning resolution, sensitivity, and quantitation in SPR imaging, (d) the details of DNA array fabrication on chemically modified gold surfaces, and (e) two...