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RESEARCH PRODUCT

Mass Diffusion: a Molecular Description

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By definition, diffusion is the action to spread a given property i.e. a physical quantity (mass, energy) or a concept (new ideas), outside an initial space zone to the surroundings. It is a transport process that takes its origin in the interaction of a given property with the medium or system (surrounding + initial space zone). This definition is very broad and is used to label situations as either concrete or abstract, and the word itself has been used both in common language since the ancient times (diffusio in Latin) and in different fields of knowledge such as biology, chemistry, physics, economy, sociology, etc [1]. The aim of this article is to give a simple description of what is known as diffusion in the physics of mass transfer from the perspective of the molecule (nano-scale), where it originates.