Reversible Control of Free Energy and Topography of Nanostructured Surfaces

We describe a facile method for the formation of dynamic nanostructured surfaces based on the modification of porous anodic aluminum oxide with poly(N-isopropyl acrylamide) (PNIPAAm) via surface-initiated atom transfer radical polymerization. The dynamic structure of these surfaces was investigated...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2004-07, Vol.126 (29), p.8904-8905
Main Authors: Fu, Qiang, Rama Rao, G. V, Basame, Solomon B, Keller, David J, Artyushkova, Kateryna, Fulghum, Julia E, López, Gabriel P
Format: Article
Language:English
Subjects:
Acrylic Resins - chemistry
Aluminum Oxide - chemistry
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Microscopy, Atomic Force
Nanotechnology - methods
Physics
Solid surfaces and solid-solid interfaces
Surface energy
thermodynamic properties
Surface Properties
Surface structure and topography
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Thermodynamics
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Summary:We describe a facile method for the formation of dynamic nanostructured surfaces based on the modification of porous anodic aluminum oxide with poly(N-isopropyl acrylamide) (PNIPAAm) via surface-initiated atom transfer radical polymerization. The dynamic structure of these surfaces was investigated by atomic force microscopy (AFM), which showed dramatic changes in the surface nanostructure above and below the aqueous lower critical solution temperature of PNIPAAm. These changes in surface structure are correlated with changes in the macroscopic wettability of the surfaces, which was probed by water contact angle measurements. Principal component analysis was used to develop a quantitative correlation between AFM image intensity histograms and macroscopic wettability. Such correlations and dynamic nanostructured surfaces may have a variety of uses.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja047895q