High-throughput study of protein-surface interactions using a surface plasmon resonance imaging apparatus

Protein adsorption at the liquid-solid interface is critically important for the development of biomedical materials. Surface plasmon resonance (SPR) has been widely used in real-time monitoring of protein adsorption behavior on surfaces. However, the number of combinations of protein-surface interactions that can be measured in a single experiment is limited by a conventional SPR apparatus. We assembled an SPR imaging apparatus for high-throughput studies of many sets of protein-surface interactions. In addition, SPR sensor surfaces with arrayed spots carrying different surface properties were prepared by taking advantage of self-assembled monolayers of alkanethiols. The combination of the SPR imaging apparatus and the arrayed sensor surfaces allows for multiple and real-time monitoring of protein-surface interactions.