Scanning Force Microscopy of Surface Structure and Surface Mechanical Properties of Organotrichlorosilane Monolayers Prepared by Langmuir Method

1998 ◽  
pp. 204-222 ◽  
Author(s):  
Atsushi Takahara ◽  
Shouren Ge ◽  
Ken Kojio ◽  
Tisato Kajiyama
Keyword(s):  
Mechanical Properties ◽  
Surface Structure ◽  
Scanning Force Microscopy ◽  
Force Microscopy ◽  
Scanning Force ◽  
Langmuir Method

Spatial mapping of the mechanical properties of the living retina using scanning force microscopy

Soft Matter ◽  
2011 ◽  
Vol 7 (7) ◽  
pp. 3147 ◽  
Author(s):  
Kristian Franze ◽  
Mike Francke ◽  
Katrin Günter ◽  
Andreas F. Christ ◽  
Nicole Körber ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Scanning Force Microscopy ◽  
Spatial Mapping ◽  
Force Microscopy ◽  
Scanning Force

The boron oxide–boric acid system: Nanoscale mechanical and wear properties

1999 ◽  
Vol 14 (8) ◽  
pp. 3455-3466 ◽  
Author(s):  
Xiangdong Ma ◽  
W. N. Unertl ◽  
A. Erdemir
Keyword(s):  
Mechanical Properties ◽  
Boric Acid ◽  
Boron Oxide ◽  
Surface Film ◽  
Water System ◽  
Scanning Force Microscopy ◽  
Wear Properties ◽  
Force Microscopy ◽  
Preparation Conditions ◽  
Scanning Force

The film that forms spontaneously when boron oxide (B2O3) is exposed to humid air is a solid lubricant. This film is usually assumed to be boric acid (H3BO3), the stable bulk phase. We describe the nanometer-scale surface morphology, mechanical properties, and tribological properties of these films and compare them with crystals precipitated from saturated solutions of boric acid. Scanning force microscopy (SFM) and low-load indentation were the primary experimental tools. Mechanical properties and their variation with depth are reported. In all cases, the surfaces were covered with a layer that has different mechanical properties than the underlying bulk. The films formed on boron oxide showed no evidence of crystalline structure. A thin surface layer was rapidly removed, followed by slower wear of the underlying film. The thickness of this initial layer was sensitive to sample preparation conditions, including humidity. Friction on the worn surface was lower than on the as-formed surface in all cases. In contrast, the SFM tip was unable to cause any wear to the surface film on the precipitated crystals. Indentation pop-in features were common for precipitated crystals but did not occur on the films formed on boron oxide. The surface structures were more complex than assumed in models put forth previously to explain the mechanism of lubricity in the boron oxide–boric acid–water system.

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