Weak dispersive forces between glass and gold macroscopic surfaces in alcohols

Abstract

In this work we concentrate on an experimental validation of the Lifshitz theory for the van der Waals and the Casimir forces in gold-alcohol-glass systems. From this theory weak dispersive forces are predicted when the dielectric properties of the intervening medium become comparable to one of the interacting surfaces. Using inverse colloid probe atomic force microscopy dispersive forces were measured occasionally and under controlled conditions by addition of salt to screen the electrostatic double layer force if present. The dispersive force was found to be attractive and an order of magnitude weaker than that in air. Although the theoretical description of the forces becomes less precise for these systems even with full knowledge of the dielectric properties, we find still our results in reasonable agreement with the Lifshitz theory.

Nanoscale Radiative Heat Flow due to Surface Plasmons in Graphene and Doped Silicon

“…In the plate-sphere case for SiO 2 -SiC the calculations varied significantly but only within 20%. For calculations based on the dielectric data of sodalime glass [32,33] the results were 20% higher than the experimental result. The precise result strongly depended on the absorption of silica in the range of the phonon-polariton peak in SiC.…”

“…For the SoI15 sample we used different dielectric data for silica [31][32][33]. For the SoI20 sample we varied n h by a factor two around the measured value from 1.8 to 7.…”

“…SiC was optically modeled as a single oscillator [8], and optical data for graphite, silica and sodalime glasses were used from refs. [30][31][32][33]. The RHT theory for graphene is based on [10], in which values for n h and μ from the literature are used.…”

Variations of the Lifshitz–van der Waals force between metals immersed in liquids

“…Experiments by van Zwol et al also validated Lifshitz theory measuring the force between Au and glass immersed in alcohol using inverse colloid probe atomic force microscopy [15].…”

Influence of ultrathin water layer on the van der Waals/Casimir force between gold surfaces

“…[7][8][9] These properties make the dispersive force an important player in nanosciencies. Moreover, from the fundamental point of view, measurements of the forces from nano to microscales have attracted strong interest in a search of hypothetical fields beyond the standard model.…”