Solid-Phase Microcontact Printing for Precise Patterning of Rough Surfaces: Using Polymer-Tethered Elastomeric Stamps for the Transfer of Reactive Silanes
Autor: | Pinar Akarsu, Stefan Reinicke, Richard Grobe, Martin Reifarth, Marcel Sperling, Alexander Böker, Julius Nowaczyk, Matthias Hartlieb |
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Rok vydání: | 2021 |
Předmět: |
microcontact printing
Materials science Polymers and Plastics surface patterning 02 engineering and technology Substrate (printing) 010402 general chemistry Elastomer Polymer brush 01 natural sciences Article capillary-active substrates PDMS surface grafting chemistry.chemical_compound silane chemistry chemistry.chemical_classification Silanes Polydimethylsiloxane Process Chemistry and Technology Organic Chemistry Polymer 021001 nanoscience & nanotechnology Silane 0104 chemical sciences chemistry Chemical engineering shuttled RAFT-polymerization Microcontact printing 0210 nano-technology |
Zdroj: | ACS Applied Polymer Materials |
ISSN: | 2637-6105 |
Popis: | We present a microcontact printing (μCP) routine suitable to introduce defined (sub-) microscale patterns on surface substrates exhibiting a high capillary activity and receptive to a silane-based chemistry. This is achieved by transferring functional trivalent alkoxysilanes, such as (3-aminopropyl)-triethoxysilane (APTES) as a low-molecular weight ink via reversible covalent attachment to polymer brushes grafted from elastomeric polydimethylsiloxane (PDMS) stamps. The brushes consist of poly{N-[tris(hydroxymethyl)-methyl]acrylamide} (PTrisAAm) synthesized by reversible addition–fragmentation chain-transfer (RAFT)-polymerization and used for immobilization of the alkoxysilane-based ink by substituting the alkoxy moieties with polymer-bound hydroxyl groups. Upon physical contact of the silane-carrying polymers with surfaces, the conjugated silane transfers to the substrate, thus completely suppressing ink-flow and, in turn, maximizing printing accuracy even for otherwise not addressable substrate topographies. We provide a concisely conducted investigation on polymer brush formation using atomic force microscopy (AFM) and ellipsometry as well as ink immobilization utilizing two-dimensional proton nuclear Overhauser enhancement spectroscopy (1H–1H-NOESY-NMR). We analyze the μCP process by printing onto Si-wafers and show how even distinctively rough surfaces can be addressed, which otherwise represent particularly challenging substrates. |
Databáze: | OpenAIRE |
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