Squeeze-out of branched alkanes on graphite

Autor: Gosvami, N. N., Sinha, S. K., O Shea, S. J.
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: PHYS REV LETT, 100 (7), Article 076101. (2008)
Popis: We study squalane and heptamethylnonane (HMN) confined between a conducting atomic force microscope tip and a graphite surface. Solvation layering occurs for both liquids but marked differences in the squeeze out mechanics are observed for ordered or disordered monolayers. The squalane monolayer at 25 degrees C is an ordered solid, as verified by direct imaging, and the squeeze out can be modeled using elastic continuum mechanics. HMN is in a disordered state at 25 degrees C and cannot be modeled as a single elastic asperity even in solid-solid contact because HMN liquid is trapped in the contact zone.
Databáze: OpenAIRE