Surface Patterning Using Two‐Phase Laminar Flow and In Situ Formation of Aryldiazonium Salts

In the reaction zone: Reaction of an aryltriazene with acid generates the corresponding aryldiazonium ion. When this reaction takes place in the mixing zone, at the interface between two streams flowing laminarly and in parallel through a 100 μm microchannel, a submicrometer line of organic film is grafted at the substrate surface.