Triboelectrification between smooth metal surfaces coated with Self-assembled Monolayers (SAMs)

Journal of Physical Chemistry B

Volumn 110, Issue 44, 2006, Pages 22271-22278

  Akbulut, Mustafa ^a   Godfrey Alig, Anna R ^a   Israelachvili, Jacob ^a  

^a UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CHARGE TRANSFER; ELECTRIC LOADS; FRICTION; SURFACE ROUGHNESS; TRIBOELECTRICITY;

ELECTRONHOLE FORMATION; MOLECULAR-LEVEL ROUGHNESS; SMOOTH SLIDING; SYMMETRIC SURFACES;

SELF ASSEMBLY;

EID: 33751340743     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp063161j     Document Type: Article

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46. When comparing the results of different experiments, the highest load does not necessarily correspond to the highest pressure because of the different thicknesses of the glue layers used to support the mica substrates. Different glue layer thicknesses give rise to different stiffnesses of the mica "backing" and, therefore, different contact areas for a given load.
47. It is important to mention that, since these surfaces contained a light-absorbing layer of thin metal, the sharpness and intensity of the FECO were reduced. This caused a reduction in accuracy (or resolution) of measuring surface separations to ±3-4 Å (±1.5-2.0 Å per monolayer when one is present on each surface) instead of the typical resolution of ±1 Å.
48. These different distances and times reflect the different molecular processes associated with the "forced adaptation" and "natural relaxation" of tribological systems.
49. Different surfaces have a finite interfacial energy which inhibits mixing.
50. A common physics problem is to show that, when a charge Q located within the nonconducting gap between two capacitor plates (conducting electrode surfaces) moves a distance d normal to the surfaces, the charge flowing through an external wire connecting the two electrodes is Qd/D. This result is independent of any fixed voltage applied across the electrode surfaces.