Mechanics and geometry of nanoasperity contacts in organic fluids

Mann, Adrian B.
November 2004
Applied Physics Letters;11/29/2004, Vol. 85 Issue 22, p5203
Academic Journal
Nanoindentation measurements show that immersion of GaAs (100) in a long-chain alcohol causes an apparent increase in both the hardness and reduced elastic modulus of the GaAs. In contrast to the results for alcohol, immersion in distilled water has no discernable effect on the mechanical behavior of the surface. The results are explained by the ability of the long-chain alcohols to sustain elastic strains when they are in the highly confined geometry around a nanoasperity contact. This “elastic fluid” behavior modifies both the contact area and elastic properties of the nanoasperity contact.


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