The success of
nucleation hinges on many factors: thermodynamics, probability and chemical
properties of CCN. In a one component system, only one precursor species is
present. Many examples cite sulphuric acid as the predominant precursor species
due widespread research agreeing its direct involvement in nucleation. As sulphuric
acid gas particles aggregate onto each other in a single component system
(consisting only one chemical species: itself). The rate of condensation (gas
particles aggregating onto each other) is directly proportional to the particle
radius to which it is adhesively bonding to. The larger the particle radius, the
larger the surface energy.