41. The light from the lamp consists of Van der Waals forces from the mercury atoms in the arc. 42. In liquid solutions, the metal nanoparticles are close enough together to be affected by van der Waals force . 43. In liquid helium, Van der Waals forces actually work to solidify the first few monolayers against a solid. 44. Raising the temperature gradually increases the molecular vibrations that overcome the van der Waals forces making it elastic. 45. A dihelium molecule bound by Van der Waals forces was first proposed by John Clarke Slater in 1928. 46. Uncontrolled flocculation of powders due to attractive van der Waals forces can also give rise to microstructural inhomogeneities. 47. Its resistance to van der Waals forces makes PTFE the only known surface to which a gecko cannot stick. 48. Indeed, TEM observation of radial elasticity suggested that even the van der Waals forces can deform two adjacent nanotubes. 49. Expressions for the van der Waals forces for many different geometries using the Lifshitz theory have likewise been published. 50. This allows them to overcome the van der Waals force by peeling their toes off surfaces from the tips inward.
