Fig. 1. Workflow of the microarray fabrication. (1) MIP microspheres selective to ENRO and NIP microspheres used as control, were prepared following a precipitation–polymerization approach. (2) MIP microspheres were extensively washed with MeOH : TFA (95 : 5, v/v), MeOH, followed by acetone until no trace of the template was observed. (3) MIP and NIP microspheres were then encoded with C30 and [Ru(dip)3]Cl₂, in THF and THF : MeCN (70 : 30, v/v), respectively. (4) A suspension of 0.25 mg mL^–1 of NIP and MIP microspheres were prepared in MeCN, and a drop of 1 μL of the suspension was deposited onto the etched distal end of the fiber.