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We report an optimized two-step thermopolymerization process carried out incontact with micropatterned molds that yields porous phenolic resin dual-usestamps with topographically micropatterned contact surfaces. With these stamps,two different parallel additive substrate manufacturing methods can beexecuted: capillary stamping and decal transfer microlithography. Undermoderate contact pressures, the porous phenolic resin stamps are used fornon-destructive ink transfer to substrates by capillary stamping. Continuousink supply through the pore systems to the contact surfaces of the porousphenolic resin stamps enables multiple successive stamp-substrate contacts forlithographic ink deposition under ambient conditions. No deterioration of thequality of the deposited pattern occurs and no interruptions for inkreplenishment are required. Under high contact pressure, porous phenolic resinstamps are used for decal transfer printing. In this way, the tips of thestamps' contact elements are lithographically transferred to counterpartsubstrates. The granular nature of the phenolic resin facilitates the ruptureof the contact elements upon stamp retraction. The deposited phenolic resinmicropatterns characterized by abundance of exposed hydroxyl groups are used asgeneric anchoring sites for further application-specific functionalizations. Asexample, we deposited phenolic resin micropatterns on quartz crystalmicrobalance resonators and further functionalized them with polyethyleniminefor preconcentration sensing of humidity and gaseous formic acid. We envisionthat also preconcentration coatings for other sensing methods, such asattenuated total reflection infrared spectroscopy and surface plasmon resonancespectroscopy, are accessible by this functionalization algorithm

Phenolic Resin Dual-Use Stamps for Capillary Stamping and Decal Transfer Printing