Mechanical properties of thin polymer films on stiff substrates
Article first published online: 17 AUG 2010
Copyright © 2010 Wiley Periodicals, Inc.
Special Issue: Special Issue on Nanofriction and Nanoindentation Using Advanced Scanning Probe Techniques
Volume 32, Issue 5, pages 282–293, September/October 2010
How to Cite
Silbernagl, D. and Cappella, B. (2010), Mechanical properties of thin polymer films on stiff substrates. Scanning, 32: 282–293. doi: 10.1002/sca.20196
- Issue published online: 12 NOV 2010
- Article first published online: 17 AUG 2010
- Manuscript Accepted: 6 JUL 2010
- Manuscript Received: 7 JUN 2010
- atomic force microscopy;
- thin films
Force–displacement curves have been acquired with a commercial atomic force microscope on thin films of poly(n-butyl methacrylate) on glass substrates in order to examine the so-called “mechanical double layer” topic, i.e. the influence of the substrate on the mechanical properties of the film in dependence of the film thickness. The hyperbolic fit, a novel semi-empirical equation introduced in previous articles, has been further corroborated. The interpretation of this equation has been deepened, yielding a quantitative and demonstrative characterization of the mechanical properties of double layers. Provided that the Young's moduli of bulk polymer and substrate are measured from the deformation curves, this mathematical model permits to fit the deformation–force curves on the double layers and to determine the thickness of the polymer films in wide range (0–200 nm). SCANNING 32: 282–293, 2010. © 2010 Wiley Periodicals, Inc.