Rapid and Facile Microwave-Assisted Surface Chemistry for Functionalized Microarray Slides

This report describes a rapid and facile method for surface functionalization and ligand patterning of glass slides based on microwave-assisted synthesis and a microarraying robot. The optimized reaction enables surface modification 42-times faster than conventional techniques and includes a carboxylated self-assembled monolayer, polyethylene glycol linkers of varying length, and stable amide bonds to small molecule, peptide, or protein ligands to be screened for binding to living cells. Customized slide racks that permit functionalization of 100 slides at a time to produce a cost-efficient, highly reproducible batch process. Ligand spots can be positioned on the glass slides precisely using a microarraying robot, and spot size adjusted for any desired application. Using this system, live cell binding to a variety of ligands is demonstrate and PEG linker length is optimized. Taken together, the technology we describe should enable high-throughput screening of disease-specific ligands that bind to living cells.