Induction time in nucleation kinetics

Abstract

The full expression for the induction time in homogeneous nucleation given by Wu has been evaluated for small critical nucleus sizes. It is shown, using parameters relevant to the Cu-Co alloy system, that Wu's analytical approximation for large critical nucleus sizes holds to quite small values (~10 atoms). A more elaborate expression from Shneidman and Weinberg was also examined; it yields slightly different predictions.     

Study of electroplated silver–palladium biofouling inhibiting coating

Abstract

Biofouling can cause many undesirable effects in industrial and medical settings. In this study, a new biofouling inhibiting Ag–Pd surface was designed to form an inhibiting effect by itself. This design was based on silver combined with nobler palladium, both with catalytic properties. Owing to the potential difference between silver and palladium while contacting with an electrolyte, the surface can form numerous discrete anodic and cathodic areas, so that an inhibiting reaction can occur. In this paper, a series of electrochemical and biological investigations were conducted to study the properties and biofouling inhibiting mechanism of these surfaces. In this study, the evidence is presented that the inhibiting effect can be caused by the electrochemical interactions and/or electric field between Pd and Ag/AgCl combined with an organic environment.