Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2011-10-26
J. Chem. Phys. 136, 034509 (2012)
Physics
Condensed Matter
Soft Condensed Matter
52 pages, 6 figures; Revised as per referee comments
Scientific paper
10.1063/1.3677191
A general theory of nucleation for colloids and macromolecules in solution is formulated within the context of fluctuating hydrodynamics. A formalism for the determination of nucleation pathways is developed and stochastic differential equations for the evolution of order parameters are given. The conditions under which the elements of Classical Nucleation Theory are recovered are determined. The theory provides a justification and extension of more heuristic equilibrium approaches based solely on the free energy. It is illustrated by application to the low-concentration/high-concentration transition in globular proteins where a novel two-step mechanism is identified where the first step involves the formation of long-wavelength density fluctuations and the second step is the actual nucleation event occuring within the fluctuation.
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