@article {Choi2018Jan, title = {Rapid Patterning of PDMS Microfluidic Device Wettability Using Syringe-Vacuum-Induced Segmented Flow in Nonplanar Geometry}, journal = {ACS Appl. Mater. Interfaces}, volume = {10}, number = {4}, year = {2018}, month = {Jan}, pages = {3170{\textendash}3174}, publisher = {American Chemical Society}, abstract = {We present a simple and rapid method to spatially pattern the surface wetting properties of PDMS microfluidic devices by layer-by-layer (LbL) deposition of polyelectrolytes using syringe-vacuum-induced segmented flow in nonplanar geometry. Our technique offers selective surface modification in microfluidic chips with multiple flow-focusing junctions, enabling production of monodisperse double- and triple-emulsion drops.}, issn = {1944-8244}, doi = {10.1021/acsami.7b17132}, url = {https://pubs.acs.org/doi/abs/10.1021/acsami.7b17132}, author = {Choi, Chang-Hyung and Hyomin Lee and Weitz, DavidA.} }