Self-assembly of gradient concentric rings via solvent evaporation from a capillary bridge

Jun Xu, Jianfeng Xia, Suck Won Hong, Zhiqun Lin, Feng Qiu, Yuliang Yang

Research output: Contribution to journalArticlepeer-review

246 Scopus citations

Abstract

A drop of solution containing nonvolatile solute is allowed to evaporate from a sphere-on-flat geometry. Left behind is a striking pattern of gradient concentric rings with unprecedented regularity. The center-to-center distance between adjacent rings, λC-C, and the height of the ring, hd, are strongly affected by the concentration of the solution and the properties of the solvent. The nature of the formation of regular gradient ring patterns during the course of irreversible solvent evaporation is revealed through theoretical calculations based on the mass conservation of the solution.

Original languageEnglish
Article number066104
JournalPhysical Review Letters
Volume96
Issue number6
DOIs
StatePublished - 2006

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