Coating composition and random array of microspheres

摘要

A coating composition for making a microarray comprising: a gelling agent or a precursor to a gelling agent and microspheres dispersed in a fluid; wherein, upon coating the composition on a substrate, said microspheres become immobilized in the plane of coating and form a random pattern on the substrate. The substrate is characterized by an absence of specific sites capable of interacting physically or chemically with the microspheres.