2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Size Relations in Micro and Nanoscale Coalescence

B.M. Weon, K.H. Lee, J.H. Je, Y. Hwu and G. Margaritondo
Pohang University of Science and Technology, KR

coalescence, size, bubble, droplet

Coalescence is a ubiquitous, very important, and largely unexplored issue in soft materials science. Size effects and the corresponding mathematical relations are particularly interesting because of their links with the driving factor and with the coalescence rate. Quantitative results are particularly valuable for the control of bubbles and droplets in microfluidics and nanofluidics. We present an experimental and theoretical study of coalescence phenomena focused on the relation between the sphere sizes and on the factor that drives the mechanism. Our simple model explains the experimental results on the size relation for the coalescence of microbubbles and mercury droplets in terms of a general equation linking all radii. It also clarifies the link between the coalescing particle sizes and the energy difference that drives coalescence, opening the way to possible applications in predicting the characteristics of many different coalescence phenomena in soft materials, particularly in micro and nanoscale events.

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Nanotech 2007 Conference Program Abstract


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