Brandow Susan L, Schull Terence L, Martin Brett D, Guerin Daniel C, Dressick Walter J
Center for Bio/Molecular Science & Engineering (Code 6950), Naval Research Laboratory, 4555 Overlook Avenue, S.W. Washington, DC 20375-5348, USA.
Chemistry. 2002 Dec 2;8(23):5363-7. doi: 10.1002/1521-3765(20021202)8:23<5363::AID-CHEM5363>3.0.CO;2-6.
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 degrees C, 5 min) leads to the efficient alkylation of mobile pyridine adsorbate by the C-Cl 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.
我们展示了基于水凝胶的微接触印刷，将胺配体印入氯甲基苯基硅氧烷或聚合物薄膜的溶剂模板化纳米腔中。印刷后薄膜中吡啶配体的迁移会影响图案保真度，通过对基材进行热处理可消除这种迁移。温和加热（例如，50摄氏度，5分钟）会使薄膜的C-Cl键将移动的吡啶吸附物有效烷基化，将吸附物作为吡啶鎓盐共价连接到表面。随后，基于钯的胶体与表面吡啶鎓（以及剩余牢固结合且不移动的吡啶配体）位点结合，可实现选择性化学镀金属并制造图案化金属薄膜。
