Thermodynamics of surface defects at the aspirin/water interface

Efficient Calculation of Microscopic Dissolution Rate Constants: The Aspirin-Water Interface

We present a molecular simulation approach to efficiently determine quantitative rate constants for rare dissolution events from organic crystals. Metadynamics is employed to generate a tailored bias potential that accelerates the escape from the bound state in subsequent hyperdynamics simulations. The robustness and acceleration obtained in the application to kink site dissolution at the aspirin(001)/water interface suggests this technique as a suitable tool to unravel the atomic-scale mechanisms of crystal dissolution.