Functional imaging with chemically amplified resists and organic molecules

Chemically amplified resists were tested for preparing universal templates to bind various organic species in micron-scale patterns (functional images). PTV exposure and heating of a poly(di-tert-butyl fumarate-co-styrene):onium salt resist produced alternating areas of nonpolar ester and polar acid/anhydride polymers. Various compounds that were fluorescent dyes or amines could then be placed selectively either into of onto exposed or nonexposed areas, according to the nature of solvents and binding species. The ease and extent of immobilization were found to depend on (i) resist composition, (ii) matrix wettability and permeability by a solvent, and (iii) covalent, ionic, dipole-dipole, or other sorbate-matrix binding interactions.