Reversing Coffee-Ring Effect by Laser-Induced Differential Evaporation.

ABSTRACT: The coffee-ring effect, ubiquitously present in the drying process of aqueous droplets, impedes the performance of a myriad of applications involving precipitation of particle suspensions in evaporating liquids on solid surfaces, such as liquid biopsy combinational analysis, microarray fabrication, and ink-jet printing, to name a few. We invented the methodology of laser-induced differential evaporation to remove the coffee-ring effect. Without any additives to the liquid or any morphology modifications of the solid surface the liquid rests on, we have eliminated the coffee-ring effect by engineering the liquid evaporation profile with a CO₂ laser irradiating the apex of the droplets. The method of laser-induced differential evaporation transitions particle deposition patterns f

SUBMITTER: Yen TM 

PROVIDER: S-EPMC5816656 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature