A technique to measure Poisson’s ratio of ultrathin polymeric films using atomic force microscopy

2003 ◽  
Vol 74 (2) ◽  
pp. 1043-1047 ◽  
Author(s):  
Bharat Bhushan ◽  
Prasad S. Mokashi ◽  
Tiejun Ma
Keyword(s):  
Atomic Force Microscopy ◽  
Poisson’S Ratio ◽  
Polymeric Films ◽  
Poisson's Ratio ◽  
Force Microscopy ◽  
Atomic Force

Simultaneous Determination of E, G and ν of Soft Hydrogels Using Theory of Elasticity

2009 ◽  
Author(s):  
Uday Chippada ◽  
Xue Jiang ◽  
Lulu Li ◽  
Rene Schloss ◽  
Bernard Yurke ◽  
...  
Keyword(s):  
Poisson’S Ratio ◽  
Theory Of Elasticity ◽  
Complete Characterization ◽  
Poisson's Ratio ◽  
Force Microscopy ◽  
Cellular Processes ◽  
Atomic Force ◽  
Significant Research

Hydrogels have been used as substrates by many researchers in the study of cellular processes. The mechanical properties of these gels play a significant role in the growth of the cells. Significant research using several methods like compression, indentation, atomic force microscopy and manipulation of beads has been performed in the past to characterize the stiffness of these substrates. However, most of the methods employed assume the gel to be incompressible, with a Poisson’s ratio of 0.5. However, Poisson’s ratio can differ from 0.5. Hence, a more complete characterization of the elastic properties of hydrogels requires that one experimentally obtain the value of at least two of the three quantities: Poisson’s ratio, shear modulus, and elastic modulus.

Characterization of cross-linking depth for thin polymeric films using atomic force microscopy

2014 ◽  
Vol 132 (8) ◽  
pp. n/a-n/a ◽  
Author(s):  
Qiuquan Guo ◽  
Maxim Paliy ◽  
Brad Kobe ◽  
Tomas Trebicky ◽  
Natalie Suhan ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Polymeric Films ◽  
Cross Linking ◽  
Force Microscopy ◽  
Atomic Force

Interfacially Confined Polymeric Systems Studied by Atomic Force Microscopy

1996 ◽  
Vol 464 ◽  
Author(s):  
René M. Overney ◽  
Lantao Guo ◽  
Hirono Totsuka ◽  
Miriam Rafailovich ◽  
Jonathan Sokolov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Surface Science ◽  
Ultrathin Films ◽  
Polymeric Films ◽  
Nanometer Scale ◽  
Polymeric Systems ◽  
Force Microscopy ◽  
Copolymer Films ◽  
Atomic Force

ABSTRACTWithin the last few years, a surface science technique, the atomic force microscopy (AFM), has evolved to be capable of simultaneously measuring tribological (friction, wear, adhesion) and rheological (elastic moduli, viscosity, hardness) properties and topography on the nanometer scale. Particularly for thin polymeric films, the AFM can be efficiently used for studying surface mechanical properties which are of fundamental importance to help predict stress and frictional behavior of interfacially confined ultrathin films.In this paper, the following aspects will be discussed: (a) mechanical properties of ultrathin homopolymer and copolymer films, (b) dewetting dynamics of interfacially confined phase-separated homopolymers, and (c) the influence of graft-copolymers on the wetting and dewetting characteristics of homopolymers.

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