Determination of Surface Free Energy at the Nanoscale via Atomic Force Microscopy without Altering the Original Morphology

2013 ◽  
pp. 173-189
Author(s):  
L. Mazzola ◽  
A. Galderisi
Keyword(s):  
Atomic Force Microscopy ◽  
Free Energy ◽  
Surface Free Energy ◽  
Force Microscopy ◽  
Atomic Force

Determination of the Surface Free Energy of Crystalline and Amorphous Lactose by Atomic Force Microscopy Adhesion Measurement

2006 ◽  
Vol 23 (2) ◽  
pp. 401-407 ◽  
Author(s):  
Jianxin Zhang ◽  
Stephen Ebbens ◽  
Xinyong Chen ◽  
Zheng Jin ◽  
Shen Luk ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Free Energy ◽  
Surface Free Energy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Adhesion Measurement ◽  
Amorphous Lactose

Measurement of the Surface Free Energy of Streptavidin Crystals by Atomic Force Microscopy

Langmuir ◽  
2003 ◽  
Vol 19 (7) ◽  
pp. 2908-2912 ◽  
Author(s):  
Annalisa Relini ◽  
Silvia Sottini ◽  
Simone Zuccotti ◽  
Martino Bolognesi ◽  
Alessandra Gliozzi ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Free Energy ◽  
Surface Free Energy ◽  
Force Microscopy ◽  
Atomic Force

The effects of humidity and surface free energy on adhesion force between atomic force microscopy tip and a silane self-assembled monolayer film

2010 ◽  
Vol 25 (3) ◽  
pp. 556-562 ◽  
Author(s):  
Chien-Chao Huang ◽  
Lijiang Chen ◽  
Xiaohong Gu ◽  
Minhua Zhao ◽  
Tinh Nguyen ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Free Energy ◽  
Surface Free Energy ◽  
Adhesion Force ◽  
Capillary Condensation ◽  
Self Assembled Monolayer ◽  
Force Microscopy ◽  
Atomic Force ◽  
Rate Of Increase ◽  
Self Assembled

The relationship between atomic force microscopy probe-sample adhesion force and relative humidity (RH) at five different levels of surface free energy (γs) of an organic self-assembled monolayer (SAM) has been investigated. Different γs levels were achieved by exposing a patterned SiO2/CH3-terminated octyldimethylchlorosilane SAM sample to an ultraviolet (UV)/ozone atmosphere. A model consisting of the Laplace-Kelvin theory for capillary condensation for nanosized probe and probe-sample molecular interaction was derived to describe the adhesion force as a function of RH from 25 to 90% for different SAM γs values. The equations were solved analytically by using an equivalent curvature of the probe tip shape. Experimental results show that the adhesion force increases slightly with RH for nonpolar SAM. However, for polar SAM surfaces, it increases at first, reaches a maximum, and then decreases. Both the rate of increase and the maximum of the adhesion force with humidity are γs-dependent, which is in good agreement with theoretical prediction. The large rise in the adhesion force in this RH range is due to the capillary force.

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