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最小化 最大化


 From "Impossible" to "I'm possible"

---Prof. Yanlin Song

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最小化 最大化

Prof. Yanlin Song

Address: Institute of Chemistry, Chinese Academy of Sciences

TEL: 86-10-62529284

FAX: 86-10-62529284


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最小化 最大化

Welcome to Song's group!


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最小化 最大化

Printed Integrated Circuits by Swarm Intelligence Inspirations

Swarm Intelligence-Inspired Spontaneous Fabrication of Optimal Interconnect at the Micro/Nanoscale. Adv. Mater.. doi:10.1002/adma.201605223

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Rate-dependent interface capture beyond the coffee-ring effect



  The mechanism of droplet drying is a widely concerned fundamental issue since controlling the deposition morphology of droplet has significant influence on printing, biology pattern, self-assembling and other solution-based devices fabrication. Here we reveal a striking different kinetics-controlled deposition regime beyond the ubiquitous coffee-ring effect that suspended particles tend to kinetically accumulate at the air-liquid interface and deposit uniformly. As the interface shrinkage rate exceeds the particle average diffusion rate, particles in vertical evaporation flow will be captured by the descending surface, producing surface particle jam and forming viscous quasi-solid layer, which dramatically prevents the trapped particles from being transported to drop edge and results in uniform deposition. This simple, robust drying regime will provide a versatile strategy to control the droplet deposition morphology, and a novel direction of interface assembling for fabricating superlattices and high quality photonic crystal patterns.

(Yanan Li, Qiang Yang, Mingzhu Li, Yanlin Song. Rate-dependent interface capture beyond the coffee-ring effect [J]. Scientific reports, 2016, 6:24628.)