Drop formation and coalescence of liquid Au on nano carbon substrate. Issue 47 (25th April 2016)

• Record Type: Journal Article
• Authors: Wang, Long; Li, Xiongying; Zhou, Xuyan; Li, Yifan; Li, Hui
• Is Part Of: RSC advances. Volume 6:Issue 47(2016)
• Page Start: 41053
• Page End: 41059
• Publication Date: 2016-04-25
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra04684c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The rapid growth of the bridge connecting the two drops implies the self-similar dynamics of the coalescence of the Au liquid drops on carbon nano substrate. Abstract : Molecular dynamics simulations have been performed to investigate the coalescence of two spreading droplets on different nano carbon substrates. Simulation results show that the drop formation behavior is influenced by the surface structures of carbon substrates and geometrical shapes of drops. In the case of pillared graphene substrates, the unexpected detachment of Au drops is observed due to the dewettability. Moreover, the increase of minimum height of the bridge connecting drops exhibits power-law behavior, revealing that the bridge evolves with self-similar dynamics, which is further illustrated by the scaling profiles. Our results provide an available method to tune the coalescence of metallic liquid drops with alteration of surfaces or initial shapes, which has important implications in the industrial application such as ink-jet printing and metallurgy.