Formation of surface nanodroplets facing a structured microchannel wall
Haitao Yu, Shantanu Maheshwari, Jiuyang Zhu, Detlef Lohse, Xuehua Zhang
LAB ON A CHIP | ROYAL SOC CHEMISTRY | Published : 2017
Surface nanodroplets are important units for lab-on-a-chip devices, compartmentalised catalytic reactions, high-resolution near-field imaging, and many others. Solvent exchange is a simple solution-based bottom-up approach for producing surface nanodroplets by displacing a good solvent of the droplet liquid by a poor one in a narrow channel in the laminar regime. The droplet size is controlled by the solution composition and the flow conditions during the solvent exchange. In this paper, we investigated the effects of local microfluidic structures on the formation of surface nanodroplets. The microstructures consist of a microgap with a well-defined geometry, embedded on the opposite microch..View full abstract
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Awarded by Australian Research Council
H. Yu acknowledges the Vice-Chancellor's PhD Scholarship from RMIT University. D. L. and X. H. Z. gratefully acknowledge the support from Netherlands Center for Multiscale Catalytic Energy Conversion (MCEC) and through the FOM-Shell collaborative grant. X. H. Z. also acknowledges the support from the Australian Research Council (FT120100473, DP140100805) and D. L. and S. M. acknowledge the support through the FOM-Shell CSER programme. We also acknowledge technical support from the RMIT Micro-Nano Research Facility and discussions with Steffen Hardt on Taylor-Aris dispersion.