Heterogeneous critical nucleation on a completely-wettable substrate

Details Heterogeneous critical nucleation on a completely-wettable substrate Heterogeneous critical nucleation on a completely-wettable substrate

2011-05-27

arxiv.org/abs/1105.5470v1

Physics

Condensed Matter

Soft Condensed Matter

11pages, 9 figures, Journal of Chemical Physics to be published

Scientific paper

Heterogeneous nucleation of a new bulk phase on a flat substrate can be associated with the surface phase transition called wetting transition. When this bulk heterogeneous nucleation occurs on a completely-wettable flat substrate with a zero contact angle, the classical nucleation theory predicts that the free energy barrier of nucleation vanishes. In fact, there always exist a critical nucleus and a free energy barrier as the first-order pre-wetting transition will occur even when the contact angle is zero. Furthermore, the critical nucleus changes its character from the critical nucleus of surface phase transition below bulk coexistence (undersaturation) to the critical nucleus of bulk heterogeneous nucleation above the coexistence (oversaturation) when it crosses the coexistence. Recently, Sear [J.Chem.Phys {\bf 129}, 164510 (2008)] has shown by a direct numerical calculation of nucleation rate that the nucleus does not notice this change when it crosses the coexistence. In our work the morphology and the work of formation of critical nucleus on a completely-wettable substrate are re-examined across the coexistence using the interface-displacement model. Indeed, the morphology and the work of formation changes continuously at the coexistence. Our results support the prediction of Sear and will rekindle the interest on heterogeneous nucleation on a completely-wettable substrate.

Affiliated with

Also associated with

No associations

Rating

Heterogeneous critical nucleation on a completely-wettable substrate does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Heterogeneous critical nucleation on a completely-wettable substrate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heterogeneous critical nucleation on a completely-wettable substrate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-664493