Van der Waal Force by Heartsound Audio



 In both molecular physics and chemistry, the Van der Walls Force is a distance dependent interaction between molecules and atoms. It is unlike ionic or covalent bonds. This is because these attractions are not a result of chemical electronic bonds. The forces are correspondingly weak and are more susceptible to interference. The Van der Waals Force quickly disappears at longer distances between interacting molecules.

Dutch physicist Johannesburg Diderik Van der Waals Was a schoolteacher who became the first physics professor at the University of Amsterdam. He won a Nobel prize in 1910 for his work on the equation of state for gases and liquids.

Van der Waals Forces play an important role in a diverse number of fields Including: Supra molecular Chemistry, structural biology, polymer science, nanotechnology, surface science, and even the underlying force in some organic compound and molecular solid research.

If no other force is present, the distance between molecules at which force becomes repulsive rather than attractive as the Atoms approach one another is called the Van der Waal contact distance. This occurrence happens because of the mutual repulsion between the molecule electron clouds.

The Van der Waal forces are best described as a combination of the dispersion forces between immediately induced dipoles, the Debye Forces between permanent dipoles and induced dipoles, and the Keesom force, Whose rotational bearings are dramatically averaged overtime. 

Van der Waal Forces are dominant for collections of very small particles, such as as very fine grain powders (Were there are no capillary present). This happens, even though the force of attraction is smaller than it is for the bigger particles of the same substance. 

Another famous older example discussed is the ability of geckos to hang on a glass surface, using only one toe— To climb on sheer surfaces has been attributed to the Van der Waals forces Between the surfaces and the spatulae, Or microscopic hair like setae Found on footpads. However, in 2014, one study found that gecko adhesion to smooth Teflon surfaces is mainly determined by electrostatic interaction and not Van der Waals forces. 

More research into this amazing force  and transmitting the information to other industry applications is surely in the future. 

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