Confinement of water droplets on rectangular micro/nano-arrayed surfaces

Micro-patterned surfaces with alternate hydrophilic and hydrophobic rectangular areas effectively confine water droplets down to attolitre volumes. The contact angle, volume, and geometry of the confined droplets as a function of the geometry and physico-chemical properties of the confining surfaces...

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Bibliographic Details
Published in:Lab on a chip 2016-01, Vol.16 (13), p.2487-2493
Main Authors: Kašpar, Ond ej, Zhang, Hailong, Tokárová, Viola, Boysen, Reinhard I, Suñé, Gemma Rius, Borrise, Xavier, Perez-Murano, Francesco, Hearn, Milton T. W, Nicolau, Dan V
Format: Article
Language:English
Subjects:
Arrays
Confinement
Confining
Droplets
Hydrophobicity
Nanostructure
Screening
Simulation
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Summary:Micro-patterned surfaces with alternate hydrophilic and hydrophobic rectangular areas effectively confine water droplets down to attolitre volumes. The contact angle, volume, and geometry of the confined droplets as a function of the geometry and physico-chemical properties of the confining surfaces have been determined by phenomenological simulations, validated by atomic force microscopy measurements. The combination between experiments and simulations can be used for the purposeful design of arrays with surface-addressable hydrophobicity employed in digital microfluidics and high-throughput screening nanoarrays. Micro-patterned surfaces with alternate hydrophilic and hydrophobic rectangular areas effectively confine water droplets down to attolitre volumes.
ISSN:1473-0197
1473-0189
DOI:10.1039/c6lc00622a