Role of architecture and molecular weight in the formation of tailor-made ultrathin multilayers using dendritic macromolecules and click chemistry
2007 (English)In: Journal of Polymer Science Part A: Polymer Chemistry, ISSN 0887-624X, E-ISSN 1099-0518, Vol. 45, no 14, 2835-2846 p.Article in journal (Refereed) Published
The high efficiency and mild reaction conditions associated with the Cu(I) catalyzed cycloaddition of azides and alkynes were exploited for the covalent layer-by-layer synthesis of dendritic thin films on silicon wafers. The preparation of azide and alkyne-terminated dendrimers based on bisMPA was accomplished by a divergent strategy; combinations of these monodisperse building blocks from the 2nd to the 5th generation were used for construction of the thin films. The layer-by-layer self assembly process proceeds under ambient conditions and was monitored by ellipsometry, XPS, and ATR-IR, which showed extremely regular growth of the dendritic thin films. Film thickness could be accurately controlled by both the size/generation number of the dendrimers as well as the number of layers. In comparison with linear analogues, the growth of the dendritic films was significantly more controlled and defect-free with each layer being thinner than the corresponding films prepared from the isomeric linear polymers, demonstrating the well-defined, three-dimensional nature of the dendritic architecture.
Place, publisher, year, edition, pages
2007. Vol. 45, no 14, 2835-2846 p.
dendrimers, functionalization of polymers, layer growth, thin films, 2,2-bis(methylol)propionic acid dendrimers, chain-transfer agents, surface-confined monolayers, phase probe molecules, air-water-interface, composite films, layer, polymer, azides, copolymers
IdentifiersURN: urn:nbn:se:kth:diva-16761DOI: 10.1002/pola.22178ISI: 000247763500001ScopusID: 2-s2.0-34547486585OAI: oai:DiVA.org:kth-16761DiVA: diva2:334804
QC 201005252010-08-052010-08-05Bibliographically approved