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Polymer-based photocoupling agent for the efficient immobilization of nanomaterials and small molecules
KTH, School of Chemical Science and Engineering (CHE), Chemistry.
2011 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 27, no 15, 9372-9378 p.Article in journal (Refereed) Published
Abstract [en]

A highly efficient photocoupling agent, based on perfluorophenylazide (PFPA)-conjugated polyallylamine (PAAm), was developed for the efficient immobilization of polymers, nanoparticles, graphene, and small molecules. The conjugate, PAAm–PFPA, was synthesized, and the percentage of the photoactive moiety, PFPA, can be controlled by the ratio of the two components in the synthesis. By treating epoxy-functionalized wafers with PAAm–PFPA, photoactive surfaces were generated. Compared with the PFPA surface, these polymer-based photocoupling matrix resulted in significantly enhanced immobilization efficiencies, especially for nanomaterials and small molecules. Thus, polystyrene nanoparticles (PS NPs) and alkyl-functionalized silica nanoparticles (SNPs) were successfully immobilized on the PAAm–PFPA surface, resulting in a high material density. Graphene flakes patterned on the PAAm–PFPA surface showed improved feature resolution in addition to a higher material density compared to that of flakes immobilized on the PFPA surface. Furthermore, 2-O-α-d-mannopyranosyl-d-mannopyranose (Man2) immobilized on the PAAm–PFPA surface exhibited significantly enhanced signals when treated with lectin concanavalin A (Con A).

Place, publisher, year, edition, pages
2011. Vol. 27, no 15, 9372-9378 p.
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-77345DOI: 10.1021/la201324hISI: 000293035300038PubMedID: 21699222ScopusID: 2-s2.0-79960798835OAI: diva2:491986
QC 20120208Available from: 2012-02-07 Created: 2012-02-06 Last updated: 2012-02-13Bibliographically approved

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