Role of architecture and molecular weight in the formation of tailor-made ultrathin multilayers using dendritic macromolecules and click chemistry

Robert Vestberg, Michael Malkoch, Matthew Kade, Peng Wu, Valery V. Fokin, K. Barry Sharpless, Eric Drockenmuller, Craig J. Hawker

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

The high efficiency and mild reaction conditions associated with the Cu(I) catalyzed cycloaddition of azides and alkynes were exploited for the covalent layerby-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.

Original languageEnglish (US)
Pages (from-to)2835-2846
Number of pages12
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume45
Issue number14
DOIs
StatePublished - Jul 15 2007
Externally publishedYes

Fingerprint

Macromolecules
Dendrimers
Multilayers
Alkynes
Azides
Molecular weight
Thin films
Cycloaddition
Ellipsometry
Silicon wafers
Self assembly
Film thickness
Polymers
X ray photoelectron spectroscopy
Defects

Keywords

  • Dendrimers
  • Functionalization of polymers
  • Layer growth
  • Thin films

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Role of architecture and molecular weight in the formation of tailor-made ultrathin multilayers using dendritic macromolecules and click chemistry. / Vestberg, Robert; Malkoch, Michael; Kade, Matthew; Wu, Peng; Fokin, Valery V.; Sharpless, K. Barry; Drockenmuller, Eric; Hawker, Craig J.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 45, No. 14, 15.07.2007, p. 2835-2846.

Research output: Contribution to journalArticle

Vestberg, Robert ; Malkoch, Michael ; Kade, Matthew ; Wu, Peng ; Fokin, Valery V. ; Sharpless, K. Barry ; Drockenmuller, Eric ; Hawker, Craig J. / Role of architecture and molecular weight in the formation of tailor-made ultrathin multilayers using dendritic macromolecules and click chemistry. In: Journal of Polymer Science, Part A: Polymer Chemistry. 2007 ; Vol. 45, No. 14. pp. 2835-2846.
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