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Use of Low‐Temperature Thermal Alkylation to Eliminate Ink Migration in Microcontact Printed Patterns
Author(s) -
Brandow Susan L.,
Schull Terence L.,
Martin Brett D.,
Guerin Daniel C.,
Dressick Walter J.
Publication year - 2002
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20021202)8:23<5363::aid-chem5363>3.0.co;2-6
Subject(s) - microcontact printing , materials science , pyridinium , pyridine , siloxane , chemical engineering , polymer , substrate (aquarium) , solvent , aqueous solution , alkylation , covalent bond , polymer chemistry , nanotechnology , chemistry , organic chemistry , composite material , catalysis , oceanography , geology , engineering
We demonstrate aqueous hydrogel‐based microcontact printing of amine ligands into solvent‐templated nanocavities of chloromethylphenyl‐based siloxane or thin polymer films. Migration of pyridine ligands within films following printing, which can compromise pattern fidelity, is eliminated by heat treatment of the substrate. Gentle heating (e.g., 50 °C, 5 min) leads to the efficient alkylation of mobile pyridine adsorbate by the CCl bonds of the film, covalently tethering the adsorbate to the surface as a pyridinium salt. Subsequent binding of a Pd‐based colloid to surface pyridinium (and remaining strongly bound and immobile pyridine ligand) sites permits selective electroless metal deposition and fabrication of patterned metal films.