Inkjet printing as a tool for the patterned deposition of octadecylsiloxane monolayers on silicon oxide surfaces

• DOI: 10.1039/c3cp50331c
• Publication Date: 2013-02-18T23:08:34Z
• Authors: Christian Belgardt; Enrico Sowade; Thomas Blaudeck; Thomas Baumgärtel; Harald Graaf; Christian von Bor...; Reinhard R. Baumann
• Keywords: Octadecyltrichlorosilane; Microcontact Printing; Silicon oxide; Contact print; Self-assembled monolayer

We present a case study about inkjet printing as tool for molecular patterning of silicon oxide surfaces with hydrophobic functionality, mediated by n-octadecyltrichlorosilane (OTS) molecules. In contrast to state-of-the-art techniques such micro contact or chemical immersion subsequent lithography processes, piezo drop-on-demand does not depend on physical masters, which allows an effective direct-write rigid flexible substrates and enables short run-lengths the individual pattern. this paper, we used mesithylene-based OTS inks, jetted them in droplets 10 pL surface, evaluated water angle patterned areas fitted results Cassie's law. For inks 2.0 mM concentration, found that area coverages 38% can be obtained. Our hence show times order hundred milliseconds are sufficient form pattern regions molecules adsorbed representing at least fragmented, inhomogeneous self-assembled monolayer (OTS-SAM).