Conventional Fabrication Method for TCNQ Radical Anion Salts Molecular Wires

NMP-TCNQ (NMP = N-methylphenazinium, TCNQ = 7,7,8,8-tetracyano- quinodimethane) and (NEt₄)TCNQ gave molecular wires on a glass substrate by recrystallization from the acetone solution coexistence with the substrate. The width of the wires largely depends on the evaporation ratio of the solvent through recrystallization. When evaporating ratio of NMP-TCNQ solution was 167 μl/min, the width was minimized to 35 nm. Comparison of the IR spectra and XRD patterns with the corresponding single crystals clearly indicates that these wires have same crystallinity as the single crystals.